Malicious PDF — malware analysis report

Static analysis result for SHA-256 028301e180ffbdb6…

MALICIOUS

PDF

85.4 KB Created: 2021-09-18 09:14:13 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26
MD5: 95471f9e6a0c41a39a5c02a1c9194334 SHA-1: 80a66b012926104a712b2291463dc175554fe8e5 SHA-256: 028301e180ffbdb6e10fe104812f28043cab90aad7565fd5bf46d38d3bc17254
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF file was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. Heuristics indicate the document functions as a link farm, directing users to potentially compromised CMS uploads and disposable hosting sites. The presence of a 'download button' lure further supports a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9912

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://bgg.pirkitpadangas.lt/ckfinder/userfiles/files/vajenebobebelozinawopo.pdf In PDF document text
    • http://www.cascinasorigherio.it/wp-content/plugins/formcraft/file-upload/server/content/files/16140ff1c280b3---tenutudinamipaxuwidugapex.pdfIn PDF document text
    • https://superchills.com/userfiles/file/17269483941.pdfIn PDF document text
    • http://modernplating.com/userfiles/file/jatizezimusowogu.pdfIn PDF document text
    • https://www.lokalesichtbarkeit.de/wp-content/plugins/super-forms/uploads/php/files/273m65iml2huefa7t8pa5cqspl/72231821079.pdfIn PDF document text
    • https://cissud.eu/uploads/ck_editor/files/50106938313.pdfIn PDF document text
    • https://sinarlangit1.com/contents/files/20574953328.pdfIn PDF document text
    • https://accuratesearch.com/userfiles/file/kubevez.pdfIn PDF document text
    • https://fjordancv.info/wp-content/plugins/super-forms/uploads/php/files/6376fd3d8cf78f796694b46c7db01068/sojitugi.pdfIn PDF document text
    • http://ivelinabozilova.com/userfiles/file/57765860293.pdfIn PDF document text
    • http://evabody.ro/wp-content/plugins/formcraft/file-upload/server/content/files/1613bbf9ac821c---petibugatuwodexefotagune.pdfIn PDF document text
    • http://onyx-innovations.com/assets/ckfinder/userfiles/files/milobiduxug.pdfIn PDF document text
    • http://www.gradur.ba/wp-content/plugins/formcraft/file-upload/server/content/files/16138b8c3ac6f8---porubiko.pdfIn PDF document text
    • http://vibrobeton.by/pics/files/73481837768.pdfIn PDF document text
    • http://pataibicaj.hu/userfiles/file/vaxesinerowupabimataladid.pdfIn PDF document text
    • http://satyavnetworks.com/fck_upload_images/file/vozaxevijifowoxemivowiko.pdfIn PDF document text
    • https://lekkermooi.nl/userfiles/file/lanubonasusajenudi.pdfIn PDF document text
    • https://goodnest.info/tctt/sites/aaa/file/90997457928.pdfIn PDF document text
    • http://purepoem.com/resource/docContentImg/file/2021-09-17/f2d3be851d42b4ad91d50475d1aa6bfc.pdfIn PDF document text
    • http://talk200.com/admin/admin/uploadfiles/file/47561475663.pdfIn PDF document text
    • http://antoniolescio.net/userfiles/files/pinibepemo.pdfIn PDF document text
    • http://kibbkw.com/uploads/file/70113405546.pdfIn PDF document text
    • https://acethamessecurity.co.uk/wp-content/plugins/super-forms/uploads/php/files/117c65fc62ab32d94185a515a39753f7/masajivubobol.pdfIn PDF document text
    • https://ibextrail.com/editor-images/rokojojokir.pdfIn PDF document text
    • https://xn--80ag1a2a.xn--p1ai/files/file/galilidajumite.pdfIn PDF document text
    • http://qataminational.com/uploaded_files/userfiles/files/28112401667.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/DOqCt-cVA4I/uplcv?utm_term=mcmoney+app+apkPDF 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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e75c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE75C 18932 bytes
SHA-256: af43bb6e85f1c6546285dc07db5000a16810beadcb38f05d41132fb72a604fd3
font_01_sfnt_off000118bb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x118BB 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off000130d2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x130D2 10232 bytes
SHA-256: 634e59315b4e387c29a4094f91198854bd242b4ea62f929de75e9b9d9e5dd386