Malicious PDF — malware analysis report

Static analysis result for SHA-256 0801ab0e82fb9780…

MALICIOUS

PDF

79.9 KB Created: 2021-08-29 12:46:50 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: 10fa0a3e7f4c8a7b7a4f91b384ecd576 SHA-1: f9616274726bae030316ed5fd12c9ddd0146f191 SHA-256: 0801ab0e82fb97809b7fd153491b21618e1f8e98bd80f46b87fea6a2e1c350d1
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.001 User Execution: Malicious Link

The PDF contains a link farm pointing to multiple domains, many of which are hosted on compromised CMS upload storage or disposable hosting. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or SEO poisoning. While no scripts were directly extracted, the structure suggests an attempt to redirect users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9902

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://mvmdigital.gr/files/files/51322544203.pdf In PDF document text
    • https://bookatowncar.com/userfiles/file/83941299482.pdfIn PDF document text
    • http://antwerp-rentals.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607db21d6af7f---18738034879.pdfIn PDF document text
    • https://burmesecatclub.nz/wp-content/plugins/super-forms/uploads/php/files/5e024e431fc07bb7441c9da2821a7d44/ginuv.pdfIn PDF document text
    • https://bleikss.com/userfiles/file/95811390902.pdfIn PDF document text
    • https://vegas-shop.net/uploads/files/78783317258.pdfIn PDF document text
    • http://clinicacomciencia.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160be571ed842c---tesaxe.pdfIn PDF document text
    • https://koncnc.com/genelresimler/file/86799319866.pdfIn PDF document text
    • http://hoangminhceramics.com/app/webroot/uploads/files/7700636282.pdfIn PDF document text
    • https://www.emma-solutions.de/wp-content/plugins/formcraft/file-upload/server/content/files/16083a02dad002---93995950803.pdfIn PDF document text
    • http://www.goataxiservice.com/wp-content/plugins/formcraft/file-upload/server/content/files/160e573dd48c4b---tupexemefidivedon.pdfIn PDF document text
    • http://lavera.it/wp-content/plugins/formcraft/file-upload/server/content/files/160803ba52de04---60248234188.pdfIn PDF document text
    • https://formapolis.it/wp-content/plugins/super-forms/uploads/php/files/8781bd56b6f224aa3f1604eefd30f7f9/tafimubupexosenejuku.pdfIn PDF document text
    • http://permianhighschool1970.com/clients/e/ef/efee9fcbc667252fc4b649c8163d3733/File/3486392751.pdfIn PDF document text
    • http://liveranigioielli.it/userfiles/files/45800204521.pdfIn PDF document text
    • https://webshopplus.nl/app/webroot/files/userfiles/files/78384586265.pdfIn PDF document text
    • https://lawyerupsmart.com/tempimg/file/bewamifunuralug.pdfIn PDF document text
    • https://indiantalentjunction.com/milan/media/gasajogoxapekixaxeri.pdfIn PDF document text
    • http://humanitool.ru/userfiles/file/13381272816.pdfIn PDF document text
    • https://embassyinvietnam.com/webroot/img/files/dubonazarirumo.pdfIn PDF document text
    • http://angelcabrera.com/FCKfiles/file/mewabupu.pdfIn PDF document text
    • https://rent-1.es/ckfinder/userfiles/files/64647293847.pdfIn PDF document text
    • https://encoregallery.us/wp-content/plugins/super-forms/uploads/php/files/2295ac19c0878e7dc50d13398cb6c1d7/zolewobuxekemijenag.pdfIn PDF document text
    • http://fsoa.cn/userfiles/file/26883684484.pdfIn PDF document text
    • https://medgarlci.com/wp-content/plugins/super-forms/uploads/php/files/332b201e6bc60f0b7e9e4566740f2fbe/bizugesulukozuxoninabova.pdfIn PDF document text
    • https://demetraproject.eu/ckfinder/userfiles/files/gexirunuratopovawude.pdfIn PDF document text
    • https://xn--z4qq44i.tw/upload/actfiles/59944610155.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/cv9VXjIrmdE/uplcv?utm_term=chewing+and+lapping+mouthparts+of+honeybeePDF 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_off0000d36c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD36C 16564 bytes
SHA-256: eaa0f03b705a0c2211e155a78839173812057fbbad10282b7ed2ff4f6db59985
font_01_sfnt_off0000fd6c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFD6C 11416 bytes
SHA-256: a004ec4ff8896251c2e11cfc0ec901e658959ed4e7ce1f81105d26e0b15b8048
font_02_sfnt_off000117da.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x117DA 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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