Malicious PDF — malware analysis report

Static analysis result for SHA-256 38dbaa0fb56e218f…

MALICIOUS

PDF

76.0 KB Created: 2021-06-12 23:29:09 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: c4d714cd7245bc89351185c9f6476853 SHA-1: 2aea7ce826f4ba63b9998850448d5148d378f992 SHA-256: 38dbaa0fb56e218fcf4916ec9d42c327fbbf29670df61fd2b8123067784093d7
196 Risk Score

Malware Insights

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

The PDF contains numerous links pointing to compromised WordPress sites, suggesting an attempt to distribute malicious content or conduct phishing. The presence of a link to 'www.sunarnuricomuisvealisverismerkezi.com' hosting a PDF file, combined with the ClamAV detection and ML classifier flagging, strongly indicates malicious intent. The document body, though heavily obfuscated, contains references to 'wkhtmltopdf' and a date, consistent with file generation metadata.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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
  • PDF link to algorithmically-generated URL high PDF_RANDOM_URL_LINK
    PDF contains a clickable HTTP(S) link whose host looks algorithmically generated (pronounceable-random labels) and whose path/query carries a long high-entropy token. This is the randomized-redirector pattern of malspam phishing lures — the visible document is only a prompt — not a PDF parser vulnerability.
  • 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://pixomot.ru/uplcv?utm_term=bittersoet+season+1+download+afrikaans
    • https://m-co.de/wp-content/plugins/super-forms/uploads/php/files/btbvd622fvq3s1nb00i1u6bnhe/4326607485.pdf
    • https://www.penyembuhanholistikreiki.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b6f7d755cb8---6293321075.pdf
    • http://dioceseofniranam.org/userfiles/file/korosikepidepab.pdf
    • https://mszukam.pl/dat//file/dalotavubuzowugilenazesed.pdf
    • https://rivaflo-south.in/userfiles/files/rirufifebozetovelijixum.pdf
    • https://alternativecarrepair.com/userfiles/file/lovewexok.pdf
    • https://celovechurch.org/wp-content/plugins/super-forms/uploads/php/files/1ebe7547099c5e74b63859b008b44170/70563808272.pdf
    • https://midasspa.com/ckfinder/userfiles/files/40859170351.pdf
    • https://emergent-partners.com/wp-content/plugins/formcraft/file-upload/server/content/files/160877dcd65972---wafigedumanulibaximijatiz.pdf
    • http://www.sunarnuricomuisvealisverismerkezi.com/wp-content/plugins/super-forms/uploads/php/files/n6egbbf8rj7p2rgjvh4ph38mk2/sejexedudoxiwo.pdf
    • https://tuabogadoangel.com/wp-content/plugins/super-forms/uploads/php/files/c87b028251c6de4d887541b18c1311d2/loboxugedalajizazoxuravu.pdf
    • http://consulcongress.it/uploads/assets/file/xirudan.pdf
    • http://www.investing-in-women.com/wp-content/plugins/formcraft/file-upload/server/content/files/160799b45e0b07---85710520318.pdf
    • https://www.euroservicemilano.it/wp-content/plugins/formcraft/file-upload/server/content/files/160bc51537c849---10105794386.pdf
    • https://www.gsccn.it/wp-content/plugins/formcraft/file-upload/server/content/files/16094a316c20bd---69553232239.pdf
    • https://purebodycare.courses/wp-content/plugins/super-forms/uploads/php/files/9umvieto2glhom9hejlbtka20b/11939209071.pdf
    • https://sweetestspaparty.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607b03764eeee---89692499226.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_off0000ed22.bin
9d6b7df9740192562a6e89ffa322e99ef7e7062d64f084a2c7614641ff5a5eff
pdf-font-stream PDF embedded font (sfnt) at offset 0xED22 5156 bytes
font_01_sfnt_off0000fed7.bin
a7e2dd807c5cf11b44a1a1061f189b11316dd5f086e0121ffae866d2d3098f55
pdf-font-stream PDF embedded font (sfnt) at offset 0xFED7 10896 bytes