Malicious PDF — malware analysis report

Static analysis result for SHA-256 ba543de87512494b…

MALICIOUS

PDF

97.5 KB Created: 2021-06-26 09:07:16 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-14
MD5: ba9bcb31ef87c0e01407d93c6af9569f SHA-1: f36a90796ee490237ac8a5446b34cd98f412b9fd SHA-256: ba543de87512494b5a1e6b79d395ed66949889157c840a7e2813b509ef75423e
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The sample is a PDF file flagged by ClamAV as a phishing trojan. Heuristics indicate it functions as a link farm, with many URLs pointing to compromised CMS uploads and disposable hosting, likely to disguise malicious content. The presence of a download button lure further supports a phishing or social engineering attack. No scripts were extracted, but the overall structure suggests a malicious document intended to trick users into downloading further malware.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9712

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • PDF link farm points to compromised-WordPress upload storage medium PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM
    PDF contains multiple clickable links, across many distinct hosts, whose targets are random-slug files parked in the upload directories of vulnerable WordPress form plugins (FormCraft, Super Forms). This is the hallmark of the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains hosted on compromised sites. The PDF itself carries no exploit — the risk is the linked destinations.
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • External URI info PDF_URI
    PDF contains an external URL action
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL https://www.electriclighting.com/wp-content/plugins/super-forms/uploads/php/files/6542d55e6257f144af8bfc68473ada1a/norejiwotewuminosezu.pdf In PDF document text
    • http://zafirkort.com/uploads/files/mimotiluxik.pdfIn PDF document text
    • https://e-lightingcontrols.com/wp-content/plugins/super-forms/uploads/php/files/25a188021cbf3f0779032f19d8ea9ddd/nekizomap.pdfIn PDF document text
    • https://markzone.az/wp-content/plugins/super-forms/uploads/php/files/h1ukqs7emshjhhcs4tkiuk8m7d/wosatusokitasenufatepiv.pdfIn PDF document text
    • https://www.hungarianassociation.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608f5ce91fa3f---suxakoxonidev.pdfIn PDF document text
    • https://kicksomeglass.com/wp-content/plugins/super-forms/uploads/php/files/46a1a57fa23cb66223903708f7962c81/tumilajazeniterex.pdfIn PDF document text
    • http://famcareconnect.org/wp-content/plugins/formcraft/file-upload/server/content/files/1608ff2804bbc1---69378655931.pdfIn PDF document text
    • http://alnadaoil.com/userfiles/file/22560439329.pdfIn PDF document text
    • https://vickers-electronics.co.uk/wp-content/plugins/super-forms/uploads/php/files/efd9943054baa9713985b440954d882d/90814491222.pdfIn PDF document text
    • https://kompaspt1.com/contents//files/91334749269.pdfIn PDF document text
    • https://personalloan2u.com/wp-content/plugins/super-forms/uploads/php/files/261c0831b5e545f234237e56ef64600c/bugomodufimobolam.pdfIn PDF document text
    • https://adlinefor.com/home/webagen/public_html/korn/data/file/dunikivejinowuvapafog.pdfIn PDF document text
    • http://www.theflightfest.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609849f5be267---kageni.pdfIn PDF document text
    • https://readxyz.com/wp-content/plugins/super-forms/uploads/php/files/9551fc71ec625e6cf5d42a8c5100bf74/28946688975.pdfIn PDF document text
    • http://secohthailand.com/file_media/file_image/file/76894410463.pdfIn PDF document text
    • http://www.microsinusectomi.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607ba8f073b50---pasigewufegovulasafepa.pdfIn PDF document text
    • http://pusancard.com/userData/board/file/kosobadidopuwulaxa.pdfIn PDF document text
    • https://samtee.com/admin/images/file/misanibowasaxefefozed.pdfIn PDF document text
    • https://www.financedeclined.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/16085ed1451732---61946138211.pdfIn PDF document text
    • http://ajtoablakcentrum.com/_user/file/12879776841.pdfIn PDF document text
    • https://movesforfree.com/wp-content/plugins/super-forms/uploads/php/files/7plccpv7kk4i6vf44o3infn1g4/xuwudinukunaxeban.pdfIn PDF document text
    • https://medius.sk/userfiles/file/6230444829.pdfIn PDF document text
    • http://baharemadinah.com/wp-content/plugins/formcraft/file-upload/server/content/files/16077efe2a4a3b---vijibugefogabusa.pdfIn PDF document text
    • http://www.mkkdigital.pt/wp-content/plugins/formcraft/file-upload/server/content/files/160acf23fedc1f---vofikejodi.pdfIn PDF document text
    • http://hzjksj.com/images/upload/File/51914387757.pdfIn PDF document text
    • https://rclurie.com/wp-content/plugins/super-forms/uploads/php/files/a744eea9176ed86b09bcf6bffffdafd9/20783217428.pdfIn PDF document text
    • https://deewo.de/wp-content/plugins/formcraft/file-upload/server/content/files/1608ffef88730b---21742966261.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/GLLx1DTH0VQ/uplcv?utm_term=home+alone+3+watch+online+123moviesPDF link annotation
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000100af.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x100AF 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off000118c6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x118C6 10880 bytes
SHA-256: eca499fb37f53f04e81ee73184b551e40006f0e97ced3e838836661271921f2d
font_02_sfnt_off000131da.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x131DA 16068 bytes
SHA-256: 6d636ebcb28a43c11a0b96216d988d0aaa25e428b847d4e039b2a2a6b6e27b6d
font_03_sfnt_off000146f6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x146F6 18472 bytes
SHA-256: f9180406bf9cf000bd5a0483a8ef99323922cbab97d75b18916e7f3c6cb25919