Malicious PDF — malware analysis report

Static analysis result for SHA-256 f4a2969291a4bdd2…

MALICIOUS

PDF

85.7 KB Created: 2021-08-11 05:06:35 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: f34d8c2f0e2eab49e055cc850c6365e0 SHA-1: 41132fcc5546490de236771ea0e9f95b6548022c SHA-256: f4a2969291a4bdd2e8ed48c396ec8a54c24145ac1ab57543e1e5396be2c8f260
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous links to external websites, many of which are hosted on compromised CMS platforms. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' indicates a pattern of using disposable hosting for these links. This suggests the document is part of a link farm designed to direct users to potentially malicious or phishing content, rather than providing legitimate information.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9974

Heuristics 6

  • 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.
  • 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 http://crystalnymph.by/wp-content/plugins/super-forms/uploads/php/files/23390142926d9f5f9a437c4c3c253965/lepofaxozimupitukulo.pdf In PDF document text
    • https://portsidestrategies.com/wp-content/plugins/super-forms/uploads/php/files/c9fc4a641c873c9db74e87ba34a2ee2e/xapususaxatoroso.pdfIn PDF document text
    • https://www.geo-decouverte.com/ck/ckfinder/userfiles/files/75600938103.pdfIn PDF document text
    • https://morganmethod.com/ci/userfiles/files/sigawakezokilisesepope.pdfIn PDF document text
    • http://xn--80ab1a9a.xn--p1ai/sadm_files/jawovetur.pdfIn PDF document text
    • https://speakingparrot.com/upload/ckfinder/files/55547922265.pdfIn PDF document text
    • http://ledseoul.com/userData/board/file/lajiguluzegupumumes.pdfIn PDF document text
    • https://endoaccessories.com/wp-content/plugins/super-forms/uploads/php/files/7e67oc5pf35fqepttgcrgghv95/jagopinadaxomapani.pdfIn PDF document text
    • http://kqcme.yiaiwang.com.cn/upload/files/22640593173.pdfIn PDF document text
    • https://purefeeling8.com/data/file/32014329020.pdfIn PDF document text
    • http://remont-etalon.ru/upload/files/10793509443.pdfIn PDF document text
    • http://ahcxdq.com/uploads/file/070556123862.pdfIn PDF document text
    • https://epgeptech.hu/ckfinder/userfiles/files/32816128387.pdfIn PDF document text
    • http://indiebookoftheday.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b779622683d---zanosuja.pdfIn PDF document text
    • https://vashadvokat82.ru/wp-content/plugins/super-forms/uploads/php/files/e2b1ec5a5b07282db7e8fd01a4ee0a02/kazamuvilubalarenusejowe.pdfIn PDF document text
    • https://fzclicks.com/demo/files/editor/file/gusudizefatinusizavuzuwo.pdfIn PDF document text
    • https://claphamjunction.com.au/wp-content/plugins/super-forms/uploads/php/files/3f1654c632920fe1ed5237eb8b9e0f74/53103215416.pdfIn PDF document text
    • http://3duct.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608b9a3967f8c---42981980108.pdfIn PDF document text
    • http://avandcie-automation.fr/ckfinder/userfiles/files/34880802744.pdfIn PDF document text
    • http://afghansolar.com/userfiles/file/sodow.pdfIn PDF document text
    • http://al-bandak.com/userfiles/file/15571646487.pdfIn PDF document text
    • http://www.bufolari.com/public/immagini/file/60831435400.pdfIn PDF document text
    • http://tuzvedo.hu/elemek/file/87452761204.pdfIn PDF document text
    • https://sandalyecenneti.com/wp-content/plugins/super-forms/uploads/php/files/ps3vejnsjims39mu4gbjpsf5qj/1003890845.pdfIn PDF document text
    • http://arlingtonhigh1960.com/clients/881088/File/resevubasawovixubedafa.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/ngfLrbzwjls/uplcv?utm_term=ncert+solutions+for+class+10+social+science+civics+chapter+2+notesPDF 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_off0000e7d2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE7D2 17336 bytes
SHA-256: 43826519aa5d3a259a0637b2d8d743de469357e0636f9b4d85a049db5a0bb0be
font_01_sfnt_off00011480.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11480 11012 bytes
SHA-256: ee15d2cda2fa63505284b778e6a9a0ace89674b2f29eafc102818164f9592a8a
font_02_sfnt_off00012e29.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12E29 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1