Malicious PDF — malware analysis report

Static analysis result for SHA-256 1de2a491086f2f9d…

MALICIOUS

PDF

83.7 KB Created: 2021-09-03 04:56:18 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-05
MD5: 5a71f05f103e657a461a621340cce511 SHA-1: fc72264a4266019a78a78fbf2792d3792f5adb73 SHA-256: 1de2a491086f2f9d6f46f9a579972dd9546748af0f43a37f2ce6db0a5f019570
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains numerous external links, many of which point to compromised websites or disposable hosting, suggesting a link farm designed to redirect users to malicious content. The ClamAV detection and ML classifier strongly indicate malicious intent, likely for phishing or malware distribution. No scripts were extracted, but the structure and URL patterns are indicative of a malicious PDF.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9985

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 https://drafthe.ru/uplcv?utm_term=convertir+pdf+editable PDF link annotation
    • http://vandientuchinhhang.com/upload/files/mabibovel.pdfIn PDF document text
    • https://fuoriscena.eu/file/10124721757.pdfIn PDF document text
    • http://phutungototuanphat.com/img-tvdl/files/povekipo.pdfIn PDF document text
    • http://chinocorporatechallenge.com/clients/6216/File/wozikolovugor.pdfIn PDF document text
    • http://iwish-cosmetics.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c8ef4fd5878---ziwepivulubologoruz.pdfIn PDF document text
    • https://realestateconnect.pro/wp-content/plugins/super-forms/uploads/php/files/o7qe0ea1dko3v4tbblcjr12er6/55414941011.pdfIn PDF document text
    • https://transcendenceit.com/wp-content/plugins/super-forms/uploads/php/files/8858217d4ebf3bace4f678240297fd65/jizidoruvepazevuro.pdfIn PDF document text
    • https://equinox-e.com/upload/files/72245556313.pdfIn PDF document text
    • https://webtraffic.ch/wp-content/plugins/super-forms/uploads/php/files/25jcjsodgp15no7jci79unhpnv/rekagisekogi.pdfIn PDF document text
    • https://hmanagement.net/userfiles/file/kavadeva.pdfIn PDF document text
    • http://marketherballize.com/ckfinder/userfiles/files/9991200572.pdfIn PDF document text
    • https://jooli.ru/ckfinder/userfiles/files/mudokekidunud.pdfIn PDF document text
    • http://teakdeck.pl/files/file/25244857998.pdfIn PDF document text
    • http://animationcoach.com/userfiles/file/22102096329.pdfIn PDF document text
    • http://classtool.info/upload/files/jejasafitikokameli.pdfIn PDF document text
    • https://hssipm.com/wp-content/plugins/super-forms/uploads/php/files/3e69ef95d4d72f6375291b74b4ee58c2/83054043522.pdfIn PDF document text
    • https://iominneapolis.com/wp-content/plugins/super-forms/uploads/php/files/37787c330a7a8f0d8e012540d862276d/80347376596.pdfIn PDF document text
    • http://akcjonariusz.com/UserFiles/file/revabisagabu.pdfIn PDF document text
    • http://am-assets.com/aom/magnolia/userfiles/file/faboxi.pdfIn PDF document text
    • http://mwcapital.net//ckfinder/userfiles/files/sipezegowiwabiji.pdfIn PDF document text
    • http://cogersquest.com/clients/f/f6/f6194b381802d71b6842d6160e8859b1/File/68283295848.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e04e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE04E 19024 bytes
SHA-256: 873d1570cd4635329e3bb7ba5fec05d735b97656bbb3d35b6c5fe1656b7fe5b2
font_01_sfnt_off00011161.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11161 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00012978.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12978 10560 bytes
SHA-256: 5935f00a1abeeb3465c353a55427e0909044373147efe9a788852e2d6590b92f