Malicious PDF — malware analysis report

Static analysis result for SHA-256 01f44b7f5d0ff83b…

MALICIOUS

PDF

70.3 KB Created: 2021-09-30 23:35:29 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: c9fc14a614a7b80e630bf57a4a37727a SHA-1: afba87fa0e8aada8c265515ab681f95b69c89491 SHA-256: 01f44b7f5d0ff83bf3e7dab51726dbb63396320fb0b9e560bcaa6527cd034708
176 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF is identified as a phishing lure due to its small size, image-heavy content, and embedded clickable links. The heuristics indicate it's designed to trick users into visiting external URLs, likely for credential harvesting or further malware delivery. While no scripts were explicitly extracted, the PDF structure and link farm characteristics strongly suggest a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9916

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
  • Image-only document with action trigger (screenshot lure) medium PDF_IMAGE_LURE
    PDF has 1 image(s), only 2 text block(s), carries a click-outward action, and is only 70 KB — typical shape of a phishing lure where a full-page screenshot hides a clickable button that launches or submits to an attacker URL.
  • 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://creteotels.gr/FCKeditor/userimages/file/vowewusilotimi.pdf In PDF document text
    • http://honmamon-s.com/img_seminar/userfiles/file/kigufo.pdfIn PDF document text
    • https://beaszemin.com/files/61728232828.pdfIn PDF document text
    • http://bizwd.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613bdff8a1ad8---jobarasumesis.pdfIn PDF document text
    • http://gazdalkodjokosan.hu/img/userfiles/file/72314343340.pdfIn PDF document text
    • http://divodizain.ru/ckfinder/userfiles/files/jegeberadexumolijeluji.pdfIn PDF document text
    • http://floral-design-lindgens.de/userfiles/file/3209672371.pdfIn PDF document text
    • http://myjobcareer.net/userfiles/file/2021092601474473499.pdfIn PDF document text
    • https://marciasmithconsulting.com/wp-content/plugins/super-forms/uploads/php/files/d42a5a1ad51a60e5f6ddd8802d7f24d2/90254375756.pdfIn PDF document text
    • http://eastcoastbiker.de/sites/default/files/file/nudepitujatodigada.pdfIn PDF document text
    • http://hotstamping.pl/files/file/giketarabisuvufamapeje.pdfIn PDF document text
    • http://veszpremkosar.hu/_user/file/kotevubi.pdfIn PDF document text
    • https://popcouncilinstitute.org/wp-content/plugins/super-forms/uploads/php/files/0e3225297f9e8e506e6fb57d76347b37/16276389520.pdfIn PDF document text
    • https://gmonlinestore.com/wp-content/plugins/formcraft/file-upload/server/content/files/161368084b5d21---pekexabulemokin.pdfIn PDF document text
    • https://whatshoulditcostme.com/userfiles/file/putetejav.pdfIn PDF document text
    • http://bienchidan.org/uploads/files/9922930897.pdfIn PDF document text
    • http://cursosadistanciayonline.com/medios/files/99308251990.pdfIn PDF document text
    • http://tnslib.net/userfiles/files/27278200865.pdfIn PDF document text
    • http://sksound.com/userfiles/file/75833661109.pdfIn PDF document text
    • http://quincy.pl/ckfinder/userfiles/files/36570082644.pdfIn PDF document text
    • http://orderleesushi.com/uploads/files/rokamaxusupebukajibiraju.pdfIn PDF document text
    • http://thanglong.vn-greenenergy.com/ckfinder/userfiles/files/12480213325.pdfIn PDF document text
    • http://abwmechanicsville.com/uploads/files/moluze.pdfIn PDF document text
    • https://finestblogger.de/wp-content/plugins/super-forms/uploads/php/files/ik65vjdtmjsci64foiaju658sk/37169335193.pdfIn PDF document text
    • http://aven.su/userfiles/file/2924199099.pdfIn PDF document text
    • http://tcsklife.com/filespath/files/20210923032858.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/fzgW7-mxBc0/uplcv?utm_term=the+great+escape+movie+sylvester+stallonePDF 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_off0000b4be.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB4BE 14632 bytes
SHA-256: ae28ae9d2bf8f3fd610735c36bf7fb267bd8f636667f85b7a68e8c4fa758243e
font_01_sfnt_off0000d94d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD94D 10964 bytes
SHA-256: bf212ccf53a194638472937eeb20a46ea43ee3bc38aefd50ecc4ede7917c1bf2
font_02_sfnt_off0000f2a2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF2A2 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1