Malicious PDF — malware analysis report

Static analysis result for SHA-256 d91894bc9cbd7eec…

MALICIOUS

PDF

88.7 KB Created: 2021-09-07 14:55:51 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-31
MD5: 3ee13e21514839fb8b8b282cb42b80ca SHA-1: fa4f92bb37f9ccb0047fbfcd6e2ca448558cd9be SHA-256: d91894bc9cbd7eec11013f25edf9380b9f53c3741e9649d8c6a59bc504ac95a8
164 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ML classifiers and ClamAV, indicating a phishing or trojan threat. It functions as a link farm, with numerous embedded URLs pointing to compromised CMS upload directories and disposable hosting. These links likely lead to further malicious content or phishing pages, aiming to trick users into downloading payloads or divulging sensitive information.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9922

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.
  • Urgency / deadline lure low SE_URGENCY_LURE
    Document contains urgency or deadline language ('account will be terminated', 'action required within 24 hours', etc.) — useful context, but low-signal without other findings
  • 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://pixomot.ru/uplcv?utm_term=write+on+pdfs+ipad PDF link annotation
    • https://wavesmaroochydore.com/wp-content/plugins/super-forms/uploads/php/files/lvma0297smmoafcdhgpfl72qc6/82955908154.pdfIn PDF document text
    • https://lightingsystemscol.com/wp-content/plugins/super-forms/uploads/php/files/c1cbb50c21aeec1c45f5e00652613472/64760141671.pdfIn PDF document text
    • http://czechdidgeridoo.com/admin/upload/file/49130810268.pdfIn PDF document text
    • https://www.rath-catering.de/wp-content/plugins/formcraft/file-upload/server/content/files/1609139745f4e8---mewadogipulefibegalij.pdfIn PDF document text
    • https://ijpdua.com/contents//files/rukifotuzozugogokal.pdfIn PDF document text
    • https://wickedcheesy.com/images/file/kavonera.pdfIn PDF document text
    • http://www.sg-callenberg.de/wp-content/plugins/formcraft/file-upload/server/content/files/1607abb4c09e9e---finefefasitibukop.pdfIn PDF document text
    • http://subventionsbetrug.de/wp-content/plugins/super-forms/uploads/php/files/mipe2hjja1g4vs9h9je1jlagn6/guwef.pdfIn PDF document text
    • http://anm-av.de/uploads/files/16670240307.pdfIn PDF document text
    • http://irmascaritasdejesus.org.br/wp-content/plugins/formcraft/file-upload/server/content/files/160f1e84051b19---sufatitebapog.pdfIn PDF document text
    • https://ht-cooling-j3t.com/contents//files/sisibo.pdfIn PDF document text
    • http://kyanite.tv/userfiles/file/63781388233.pdfIn PDF document text
    • https://grdr.org/paidel/ckfinder/userfiles/files/geveluragozarawikukon.pdfIn PDF document text
    • http://fratellilongoni.com/userfiles/files/wisivekivovel.pdfIn PDF document text
    • https://tattica.byespresso.com/app/webroot/files/upload/files/vakojezomunok.pdfIn PDF document text
    • http://banphimchuot.com/userfiles/file/rumozinul.pdfIn PDF document text
    • https://lightingsystemscol.com/wp-content/plugins/super-forms/uploads/php/files/365adb8efafd77ea635b2f2d1c90b3cc/36044546642.pdfIn PDF document text
    • http://cctechlaw.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/6782714158.pdfIn PDF document text
    • https://precisionautoandac.com/wp-content/plugins/super-forms/uploads/php/files/9cf17da22e2c2c20acc282107958ebca/jawoximumilodagixoreno.pdfIn PDF document text
    • http://supair-lux.hu/ckfinder/userfiles/files/15669246036.pdfIn PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/160e90202d8aac---boruzogabubo.pdfIn PDF document text
    • http://ramz-alqassim.com/Files/files/74862509388.pdfIn PDF document text
    • https://motionslam.com/wp-content/plugins/super-forms/uploads/php/files/f8daa04a8790d21ab0de8039435a4413/70891508393.pdfIn PDF document text
    • http://businessplan-capalpha.fr/mbp/upload/images/images/upload/ckfinder/legafutasowupuxig.pdfIn PDF document text
    • http://oilandgaswork.com/userfiles/file/56990217267.pdfIn PDF document text
    • 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_off0000da48.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDA48 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000f25a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF25A 25396 bytes
SHA-256: b9294a48c30b60424123588537992e401ac36cd7eb3f8aa6c5d12b1b95c4bc28
font_02_sfnt_off00013303.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13303 10440 bytes
SHA-256: 6fd6ee548fed10ecddb0e139279f39074fbfc50adfa7917e2637e24117c268b8
font_03_sfnt_off00014ace.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14ACE 1908 bytes
SHA-256: e1b34b56f766b52dd7f6f1608e19e75f17ced996a683346d6fdfd66d0a8877c1

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