Malicious PDF — malware analysis report

Static analysis result for SHA-256 050417ab30553bfe…

MALICIOUS

PDF

93.1 KB Created: 2021-08-12 14:29:23 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: 049301ae34e5e2e5089c993298bd40db SHA-1: b8a72b579004b7aba9e8b335c9294ad4983ed433 SHA-256: 050417ab30553bfe585bcc3bedc41e02cd4942a1181a25489a7d247fb9fdb514
156 Risk Score

Malware Insights

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

The PDF contains numerous links pointing to compromised or disposable domains, a common tactic for phishing or distributing further malware. The ML classifier and ClamAV detection strongly indicate malicious intent. The presence of link farms on domains like erbilsunhotel.com and luxcottage.ru suggests an attempt to obscure the true destination or leverage compromised infrastructure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9984

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://luxcottage.ru/stroykamen/userfiles/file/61052621605.pdf In PDF document text
    • http://erbilsunhotel.com/wp-content/plugins/super-forms/uploads/php/files/3d9amfhiqtgo47hijcj7q1bpe5/kajeburunotukijapavifufi.pdfIn PDF document text
    • https://www.accidentinjuryalbuquerque.com/wp-content/plugins/super-forms/uploads/php/files/9roidc5iff5mc65g27qrn37sqs/dazep.pdfIn PDF document text
    • http://www.cheapmotorcycleinsurancepa.com/wp-content/plugins/super-forms/uploads/php/files/4bnhlc2itetjdm5652a35jcju4/60143555121.pdfIn PDF document text
    • http://commsoft.nu/demo/ktb/wsmbilder/files/12423057788.pdfIn PDF document text
    • http://innotack.com/userfiles/files/76539916427.pdfIn PDF document text
    • https://shining4u.com/wp-content/plugins/super-forms/uploads/php/files/da3efa345e31a32817e445c33fee527c/towuzusokek.pdfIn PDF document text
    • http://www.wiz-fac.com/uploadImg/file/nudaviridutelenuterudu.pdfIn PDF document text
    • http://sonkertrail.org/clients/9/92/9260a3c387aed4615f72c72c3a1da295/File/viranuzibuzuramixugo.pdfIn PDF document text
    • https://pollackmihalyiskola.hu/ckfinder/userfiles/files/91151656278.pdfIn PDF document text
    • https://backcountryplayground.com/wp-content/plugins/super-forms/uploads/php/files/353a439e9a72c7af192853b293216096/79171464255.pdfIn PDF document text
    • https://intelean.com/wp-content/plugins/formcraft/file-upload/server/content/files/16096dd54c1252---zajabawigudapux.pdfIn PDF document text
    • https://sg-design.top/wp-content/plugins/super-forms/uploads/php/files/7d223533f6bbbf0acbaf5264cdf93041/91382799994.pdfIn PDF document text
    • https://gamletaarnhuset.no/wp-content/plugins/formcraft/file-upload/server/content/files/1609872004cf50---84919537365.pdfIn PDF document text
    • https://www.beadvised.co.uk/wp-content/plugins/super-forms/uploads/php/files/06ac745a86348085d711acd50addd412/zasuwefival.pdfIn PDF document text
    • http://phuquytravel.com/nguyenvanlinh/files/91196545696.pdfIn PDF document text
    • http://liebherr-tr.com/userfiles/file/jorejanuvut.pdfIn PDF document text
    • http://www.kissdocs.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/1608081a5d142c---zuwuvazefilubujufibavewa.pdfIn PDF document text
    • http://universe-micro.com/upload/files/20210701_141817.pdfIn PDF document text
    • https://airtelco.com/data/users/_/email/files/8711812612.pdfIn PDF document text
    • https://www.kiteschule-kiel.de/wp-content/plugins/formcraft/file-upload/server/content/files/1609b270bd7276---robutijotadu.pdfIn PDF document text
    • https://www.mercato.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/160c06442d61f3---fijipolozonisokukoxitil.pdfIn PDF document text
    • https://empylean.com/wp-content/plugins/super-forms/uploads/php/files/tb45ra6gnc5augrvqaj36mqgnt/19655110355.pdfIn PDF document text
    • http://quickvideo.nl/userfiles/file/kobipifosokizopewogexuw.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/3vuEKuznOb8/uplcv?utm_term=que+es+la+dieta+cetogenica+pdfPDF 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_off00010523.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10523 18032 bytes
SHA-256: c31708ec61869ae5dd4f8be8dce686f9d7a3d68aa1c430fc63f264df3f48049a
font_01_sfnt_off00013322.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13322 10852 bytes
SHA-256: 86573eab7c5f8a3d66366b8f5378aa8bf7a704fe67383576e05ea33fa738a2ff
font_02_sfnt_off00014c35.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14C35 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1