Malicious PDF — malware analysis report

Static analysis result for SHA-256 d1a2acd203edf824…

MALICIOUS

PDF

92.1 KB Created: 2021-07-27 17:34:07 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26
MD5: 6a2917fa25cf457b80c13b22733cd94d SHA-1: 84fce82f11b57e356394e0d354e7bf7e080430d6 SHA-256: d1a2acd203edf824795b8bcbe5da73dfd4297ddfebe2fa8b6d534c25a6f9aa67
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, indicating a link farm designed for SEO manipulation or to lure users to malicious sites. The ClamAV detection and ML classifier strongly suggest malicious intent, likely related to phishing or malware distribution via these links. No scripts were extracted, and the document body was unreadable, limiting further analysis of specific payloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9994

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 http://lacasedescaraibes.fr/file/57814647253.pdf In PDF document text
    • https://standardpromotion.com/images/upload/userfiles/files/89756511943.pdfIn PDF document text
    • http://www.rec39.ru/wp-content/plugins/super-forms/uploads/php/files/d440ef7248cbbd7a401612589810dacb/defonewepadowux.pdfIn PDF document text
    • http://soflocops.org/clients/83264/File/92165664207.pdfIn PDF document text
    • https://morethancleaningservices.com/wp-content/plugins/super-forms/uploads/php/files/65b9e729bd62fc4218c2db4a254c7811/30342826598.pdfIn PDF document text
    • https://mmgrowersg.com/ckfinder/userfiles/files/wewovagizaridiwevobiz.pdfIn PDF document text
    • http://veterinariomauracotti.it/userfiles/files/69143936982.pdfIn PDF document text
    • http://botosani.ro/img/uploads/file/73361763064.pdfIn PDF document text
    • http://dok-vo.ru/userfiles/file/kirefojebebawinagupukim.pdfIn PDF document text
    • http://ciaooo.ru/uploades/userfiles/file/migepeluvase.pdfIn PDF document text
    • https://engineeredrepinc.com/wp-content/plugins/super-forms/uploads/php/files/f14c7e95ae2286d48cb41ccfcc0dbf13/7402635635.pdfIn PDF document text
    • http://angelescare.com/userfiles/file/63646606675.pdfIn PDF document text
    • http://www.mkkdigital.pt/wp-content/plugins/formcraft/file-upload/server/content/files/16096c2e1e01bf---makilaxireveloxafoz.pdfIn PDF document text
    • http://beveragesgs.com/userfiles/file/lutadumokuxale.pdfIn PDF document text
    • http://kielcenoca.pl/files/file/pupevafusaputu.pdfIn PDF document text
    • http://ilovegabal.net/fckeditor/_upload/file/46180919424.pdfIn PDF document text
    • https://www.modianodesign.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609d273266fd0---kaduwitukelumubitizurik.pdfIn PDF document text
    • http://asdgolfclubtoscana.com/writable/public/userfiles/file/70179144526.pdfIn PDF document text
    • https://vernadoc.com/wp-content/plugins/super-forms/uploads/php/files/6968df62df0457cb16ed3c9bb4d735e3/xagazow.pdfIn PDF document text
    • http://kaplanpm.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bead9639563---75983640232.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/A3Ryygt5BCM/uplcv?utm_term=pre+algebra+with+pizzazz+answer+key+page+156PDF 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_off00010158.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10158 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0001196a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1196A 17392 bytes
SHA-256: 72ff396a05b915560b0e8a08642424dc1044bc14efd397ce6d4fbf6af8e25c9e
font_02_sfnt_off0001474d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1474D 11260 bytes
SHA-256: df4aff88735de2b7b50a0b4fbe8a1702e46c425eeb8ca56e48f75a5fe6e02573

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