Malicious PDF — malware analysis report

Static analysis result for SHA-256 74f00d5e996c1e8a…

MALICIOUS

PDF

80.3 KB Created: 2021-08-06 16:08:09 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23
MD5: 6276f14ad1800ffe2815138afa3d74d6 SHA-1: 353b1cb14989d4ccc1bd391a73eb44bcea271d31 SHA-256: 74f00d5e996c1e8a8bf3b2d3e2c14f493920d940d61f8e4765bb0cf4da665160
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF file was identified as malicious by ML classifiers and ClamAV, indicating a phishing or malware distribution attempt. It functions as a link farm, with numerous embedded URLs pointing to compromised or disposable domains, likely intended to lure users to malicious sites. No scripts were extracted, and the document body was unreadable, but the heuristic firings strongly suggest a malicious intent to redirect users.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9988

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://medvor.ru/uplcv?utm_term=bcg+matrix+powerpoint+presentation PDF link annotation
    • http://simonhoirup.dk/userfiles/file/nipevumozobupijen.pdfIn PDF document text
    • http://argra.rs/wp-content/plugins/formcraft/file-upload/server/content/files/161042c72e2ab2---8077690820.pdfIn PDF document text
    • https://shinyjewellers.com/wp-content/plugins/super-forms/uploads/php/files/46ibdiicke7is3jrn1lubbmt7g/6382687639.pdfIn PDF document text
    • http://puppies-4u.com/clients/e/e7/e7f09595da74c05d2059c741134300d2/File/zomapima.pdfIn PDF document text
    • http://www.sunarsurdurulebilir.com/wp-content/plugins/super-forms/uploads/php/files/9lm90qtoioevdl0bjg23dev385/37593424670.pdfIn PDF document text
    • http://papianiarch.it/userfiles/files/5546783499.pdfIn PDF document text
    • http://johndanton.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/monetojuwakafanabadapat.pdfIn PDF document text
    • https://roadtoring.com/wp-content/plugins/super-forms/uploads/php/files/9c240bef36ba7b7b5ed32df8a8d59105/dotenoloduxun.pdfIn PDF document text
    • https://www.alignerco.ca/wp-content/plugins/super-forms/uploads/php/files/3b330ffbffc7437984d2373cac5f2391/68472667733.pdfIn PDF document text
    • https://denizlihorozu.com/resimler/files/15394377729.pdfIn PDF document text
    • https://adepotcustom.com/UploadFiles/file/20210716215604148.pdfIn PDF document text
    • http://cameronhaddock.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608929b5ca842---37924087417.pdfIn PDF document text
    • http://worldnaturalfood.com/image/upload/File/76665789921.pdfIn PDF document text
    • https://morethancleaningservices.com/wp-content/plugins/super-forms/uploads/php/files/9017e2d68dd996018f7d3d940733c428/zumokurugudadubitotuluba.pdfIn PDF document text
    • http://boxerdapolenta.com/cmsimple/images/file/7912976337.pdfIn PDF document text
    • http://srlamn.com/clients/0/00/00e84243199fd86ca7c15d66a0237eb0/File/84811561809.pdfIn PDF document text
    • https://lightspec.ca/wp-content/plugins/super-forms/uploads/php/files/62209e48c4d48555aa7c29e17c3f823d/xipiwuwizaza.pdfIn PDF document text
    • http://salocchi.it/userfiles/files/98758284111.pdfIn PDF document text
    • http://amicalelaique-guyancourt.fr/ckfinder/userfiles/files/vofutevuvozozirikevusape.pdfIn PDF document text
    • https://www.chinacimctrailer.com/wp-content/plugins/super-forms/uploads/php/files/df174436f1c74cc802a174b61b00d0b5/baguz.pdfIn PDF document text
    • https://listapp.in/ci/userfiles/files/rijize.pdfIn PDF document text
    • http://3asoft.vn/img/files/liduzezob.pdfIn PDF document text
    • http://e2ingenieros.com/ckfinder/userfiles/files/vajunaximurikasadiluka.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_off0000d4e7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD4E7 10912 bytes
SHA-256: 75d1a947a435ab973c1592d6bb4258b6c9ea00c5501fe059099e03fc42a14e11
font_01_sfnt_off0000ee51.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEE51 16960 bytes
SHA-256: 8dd4fb492a297048c7f3b73fa8b3f0bbab6c328caefd50fb446c1de04bf7c8c9
font_02_sfnt_off00011aa3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11AA3 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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