Malicious PDF — malware analysis report

Static analysis result for SHA-256 069f9c2f7513170f…

MALICIOUS

PDF

70.8 KB Created: 2021-05-10 15:06:20 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 82ace474631fcea81a55664daa42a863 SHA-1: 3506f117f52744bf33ea902c65f061d153c58fae SHA-256: 069f9c2f7513170f29c24d220319267a496c8b0788a78d8e3f23173311a35517
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains a large number of links, many pointing to compromised WordPress upload directories and disposable hosting, indicating a link farm designed for phishing or malware distribution. ClamAV detected this file as 'Pdf.Phishing.Trojan', and ML classifiers also flagged it as malicious. The embedded URLs suggest an attempt to lure users to external sites, likely for credential harvesting or further payload delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9942

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 https://www.novet.de/wp-content/plugins/formcraft/file-upload/server/content/files/16086ce7001940---65084769954.pdf
    • https://www.charroninc.com/wp-content/plugins/super-forms/uploads/php/files/f63cdee53b74b1da44062475f20f02f3/bajitonewivituwomexepe.pdf
    • https://sk-developers.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608c14ff93ad4---fudosepisepufafarekav.pdf
    • https://maidintown.co.uk/wp-content/plugins/super-forms/uploads/php/files/d192750adde8d12f3cec301858fdd11c/79761337997.pdf
    • https://impariant-club.ru/wp-content/plugins/super-forms/uploads/php/files/ab45e0f2e076d0cbda050d52134c2bf2/wosokukerifewotabodunukag.pdf
    • https://cvenhancer.com/wp-content/plugins/super-forms/uploads/php/files/3c6ed696721a175153d3860c0be3fdf7/vadago.pdf
    • https://photographerin.agency/wp-content/plugins/super-forms/uploads/php/files/gmn5lpbhd4ki5u4d5lh28ovug2/88901006686.pdf
    • http://www.vitrierbxl.be/wp-content/plugins/formcraft/file-upload/server/content/files/16070356a7aaa6---14033263227.pdf
    • https://tfnd.org/wp-content/plugins/super-forms/uploads/php/files/aa0200392c469dcb288763e179c564b1/22009332871.pdf
    • https://mindweave.co.uk/wp-content/plugins/super-forms/uploads/php/files/bj18ef24qm3p0ue8bkvli5c54d/14709637451.pdf
    • http://for-rent-aalst.com/wp-content/plugins/formcraft/file-upload/server/content/files/160813c737a9dc---jezijitases.pdf
    • https://flylights.pl/wp-content/plugins/super-forms/uploads/php/files/0rrkkeiom8887mf21ug01bje5q/99189371731.pdf
    • https://saraelv.no/wp-content/plugins/formcraft/file-upload/server/content/files/160734cfd86a96---55434978783.pdf
    • http://dmn.ca/wp-content/plugins/formcraft/file-upload/server/content/files/16094d1b2aab1b---82518968266.pdf
    • http://anandamsanyal.com/userfiles/file/zefomatinitinibeve.pdf
    • https://roeveragri.ac.in/wp-content/plugins/super-forms/uploads/php/files/1a5799398548a5eccf97350bb86d239b/vawivoxawegixinuwudoled.pdf
    • https://higher-reason.com/wp-content/plugins/super-forms/uploads/php/files/aummi803ksrakbudkqk2li70je/68675089631.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/1KS0DP0cxss/uplcv?utm_term=purple+color+background+wallpapers
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e28f.bin
a889f1900c247db3c360d7e8223e97f24ef52c47311f5057d9733824d8b36a8c		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE28F 5536 bytes
font_01_sfnt_off0000f57d.bin
1209ca1f982369ef740965dae783a2584e5060c7420dcbdf52b798e46c87f33f		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF57D 9784 bytes

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