Malicious PDF — malware analysis report

Static analysis result for SHA-256 c463055445817c54…

MALICIOUS

PDF

85.7 KB Created: 2021-06-26 11:59:38 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: e6d5124c9fe84a8fd386ef4729a9d11a SHA-1: b097171aa13a0a61f2f45e95e2c9ca29275319a3 SHA-256: c463055445817c54ca51b65d216d48d8fc14666c883991e416f5c038db40eb2c
156 Risk Score

Malware Insights

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

The PDF document was flagged by a machine learning classifier and ClamAV as malicious, specifically as a phishing trojan. Heuristics indicate the presence of a link farm pointing to compromised WordPress upload directories, suggesting an attempt to host malicious files or redirect users. While no scripts were extracted, the structure and URL patterns are consistent with phishing or malware distribution campaigns.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9956

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://www.combatsim.eu/wp-content/plugins/formcraft/file-upload/server/content/files/160b6044b8f2c7---bimemawemurikatu.pdf
    • https://jgmurphy.com/wp-content/plugins/super-forms/uploads/php/files/3f50f89d67637f18d39ccffca057767a/fematobuneta.pdf
    • http://vdgairconditioning.nl/wp-content/plugins/formcraft/file-upload/server/content/files/16078d185e1142---75842452710.pdf
    • http://cfh2.com/clients/d/d2/d2a7b52150a7a947468b52e9b7560e3c/File/jumako.pdf
    • http://industrialdevices.in/uploads/dijukirine.pdf
    • https://readandenjoy.ae/userfiles/files/48055463377.pdf
    • http://www.immiflex.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ab4fa84e5b9---lilaxotegefinogolojanovi.pdf
    • https://oddluzanie.net/userfiles/file/fozevotalogepubitukolu.pdf
    • https://growlocals.com/wp-content/plugins/super-forms/uploads/php/files/48de526775d8ffbdbe9832be9ad91bab/vopif.pdf
    • https://lensprovn.com/ckfinder/userfiles/files/rojozozapiwezoga.pdf
    • http://qianlong99.org/ckfinder/userfiles/files/lakodefajevevo.pdf
    • https://www.chartsunlimited.com.ph/wp-content/plugins/formcraft/file-upload/server/content/files/160b5b40f1e584---94819128720.pdf
    • https://www.spoton.pet/wp-content/plugins/super-forms/uploads/php/files/fqbusi7ls8ui54h2mm162urr3r/67740676113.pdf
    • https://www.euroservicemilano.it/wp-content/plugins/formcraft/file-upload/server/content/files/1608cd85181cc8---temaragopemi.pdf
    • http://lavera.it/wp-content/plugins/formcraft/file-upload/server/content/files/160a1c30e44aa4---47110316535.pdf
    • http://anatolianlgs.com/userfiles/file/resilawanajasegitodefe.pdf
    • http://www.supercarrentalsofmiami.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a5ede69416f---30309713635.pdf
    • https://naoshima-habitant.com/kizuxugakopefibexafet.pdf
    • https://movesforfree.com/wp-content/plugins/super-forms/uploads/php/files/2aj88uj8h5qb05n50gurjeei50/jomesad.pdf
    • http://cableesmaltado.com/d/files/61767038495.pdf
    • https://tiklatakip.com/calisma2/files/uploads/99461679616.pdf
    • http://kutscher-customs.de/gfx/userfiles/files/lazusumafege.pdf
    • https://burragebrothers.com/demo/jolie/beta/userfiles/files/pagonugolakamajo.pdf
    • https://feedproxy.google.com/~r/skout/mBVl/~3/6naE_Nh8_CY/uplcv?utm_term=i+would+have+loved+you+anyway
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ee35.bin
7ac6c3baee0b25ec0a84f1e1536523673b51330315516d6dc3ab824d3db15efa
pdf-font-stream PDF embedded font (sfnt) at offset 0xEE35 10204 bytes
font_01_sfnt_off00010511.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x10511 16792 bytes
font_02_sfnt_off00011d23.bin
ea26aefa482f73c6fd5642847bcd85911c2baf953a4da7ed38e5023139eecd07
pdf-font-stream PDF embedded font (sfnt) at offset 0x11D23 16968 bytes