Malicious PDF — malware analysis report

Static analysis result for SHA-256 e3dd4a998d64bd6e…

MALICIOUS

PDF

77.7 KB Created: 2021-06-15 23:34:01 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 801a86b21f9d6991bddb5b58ef0190bd SHA-1: a1bf4f207110b81964e63573b068586c83d9f27b SHA-256: e3dd4a998d64bd6e235f95f5bcb3b2331653d12a2f0c2148515b170d607e39f2
156 Risk Score

Malware Insights

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

The PDF contains numerous external links, many pointing to compromised WordPress sites, suggesting a link farm designed to distribute malicious content or phish users. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or malware delivery. No scripts were extracted, but the structure and URLs are indicative of a malicious campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://laborke.ru/uplcv?utm_term=best+ats+truck+mods
    • http://www.immiflex.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606dd77f0fe81---fisepabamiwopo.pdf
    • https://spaslask.pl/wp-content/plugins/super-forms/uploads/php/files/kq10bbk7leeso6kvhijmcaelgs/30756157548.pdf
    • https://xn--i1aam8cb.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/795c416b8a2d314f984e59b998f1472f/dadasozamuli.pdf
    • https://airshow-bg.com/file/51973103608.pdf
    • http://gdbchurch.com/clients/43262/File/xunugizubeduvope.pdf
    • http://www.caribbeandentist.com/wp-content/plugins/formcraft/file-upload/server/content/files/160713d94a34aa---11194296519.pdf
    • https://avantkart.com/wp-content/plugins/super-forms/uploads/php/files/kq0l6oafkemt0p6ccbg6s3uail/49195588070.pdf
    • http://timandlor.com/userfiles/file/16984682513.pdf
    • http://faurerom.com/userfiles/file/rixifew.pdf
    • https://t4g.nasscomfoundation.org/wp-content/plugins/super-forms/uploads/php/files/ni97r24lbiecnmbtcrcvfi3525/3223054221.pdf
    • https://hoovermaids.com/wp-content/plugins/super-forms/uploads/php/files/15f5f7091f24607250631788eaa76f8f/2342576225.pdf
    • https://www.alpha-dynamics.gr/wp-content/plugins/formcraft/file-upload/server/content/files/160894bfe5b7be---nuvixikilubogusufok.pdf
    • https://www.cedicar.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a34b9ea83a3---lodutesasuwizeja.pdf
    • http://paintingservicesonline.ca/wp-content/plugins/formcraft/file-upload/server/content/files/1606cb6d03c42d---wilidiviwajexupezu.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • 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://scripts.sil.org/OFL

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e476.bin
f7f0a856f43d05039ae01a68ffe26e1c8fbf0975cdb3eccebf6c1412dd9b8a39		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE476 4896 bytes
font_01_sfnt_off0000f51a.bin
08c11d825be4890e816c048c40543ea2e60de1678ec7160b6efa4a09b18af7f9		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF51A 11208 bytes
font_02_sfnt_off00011b9f.bin
1062cd8ddf90f4344fa193b395386d5669df1a952e5759311ca261a71931f361		 pdf-font-stream PDF embedded font (sfnt) at offset 0x11B9F 4324 bytes

Open this report in the interactive analyzer, or submit your own file for analysis.