Malicious PDF — malware analysis report

Static analysis result for SHA-256 85623c731eda587a…

MALICIOUS

PDF

74.5 KB Created: 2021-06-13 02:58:50 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 0d6597ce1ee596161bdeae7b522b769c SHA-1: e424ac283a6efb6e6b28a86a6f2920d66416213b SHA-256: 85623c731eda587af2413074815630a2d903d8784eb0dcb5362d34c3c9e82999
196 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ClamAV and an ML classifier. It contains a link farm pointing to compromised WordPress upload directories and other disposable hosting, suggesting an attempt to distribute further malicious content. The 'SE_PASSWORD_ARCHIVE_LURE' heuristic indicates the document likely provides instructions to download a password-protected archive, a common tactic to bypass gateway security.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9999

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Password-protected archive handoff high SE_PASSWORD_ARCHIVE_LURE
    Document gives password instructions for an archive or attachment — often used to keep payloads encrypted until after gateway scanning
  • 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://garglob.ru/uplcv?utm_term=how+to+create+a+pdf+with+multiple+pages+on+mac
    • https://www.numberoneporthill.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/1606c89a2358e1---93669755869.pdf
    • https://burragebrothers.com/demo/jolie/beta/userfiles/files/xifirediranuzuselawisol.pdf
    • http://svazekobciorlice.cz/userfiles/file/11972060498.pdf
    • https://costumeworld.com/wp-content/plugins/formcraft/file-upload/server/content/files/16088ffac37792---99062614902.pdf
    • https://mls.lighting/wp-content/plugins/super-forms/uploads/php/files/35e74895fc41d933f3f86f96cf35cdb5/10524545587.pdf
    • https://namastehealth.in/wp-content/plugins/super-forms/uploads/php/files/cua9d8qqmp094nk73epa09fk57/23686165785.pdf
    • https://3dreamvr.com/wp-content/plugins/super-forms/uploads/php/files/fdccd14a22065e7add25cf5ec8835119/45232698237.pdf
    • http://ziepniekkalns.lv/wp-content/plugins/formcraft/file-upload/server/content/files/160960d0d7b7d4---kuxenodizum.pdf
    • https://bluebeakbranding.com/wp-content/plugins/super-forms/uploads/php/files/4174d5320f393bed6bda2f9be4a24ddc/70573762596.pdf
    • https://chefinhogourmet.com/wp-content/plugins/super-forms/uploads/php/files/647cdb9d3b652d3be35b254a55aa07c0/zidimexobi.pdf
    • https://alshamiltrading.com/alshamilfiles/file/66064770755.pdf
    • https://alignerco.com/wp-content/plugins/super-forms/uploads/php/files/59976ff659525674bda9dc3287cc14d9/22196824950.pdf
    • https://archcosmeticstudio.com.au/wp-content/plugins/super-forms/uploads/php/files/5ebeca031d487dc08a8c7a0d29182028/22390479177.pdf
    • http://saamfactory.com/wp-content/plugins/super-forms/uploads/php/files/c960f7da11e52c0fae98a4c0bf4b4fb5/vezopowigus.pdf
    • https://ecobox.eng.br/wp-content/plugins/super-forms/uploads/php/files/26hirl7ai7og2r8afbqp4tv74n/3758129722.pdf
    • http://bet-balance.com/userfiles/file/fosiribi.pdf
    • http://htwy.com/upload/file/11852297330.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • 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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e5fe.bin
b396239b27e3af85670a77f0b25b6909926ca1ddfee52a6faa2be993c6ee5142		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE5FE 5624 bytes
font_01_sfnt_off0000f906.bin
c2468c4f9e7518cc7f1d365bb2e8226eccee802a3c96b65eb624084293b1e594		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF906 10576 bytes

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