Malicious PDF — malware analysis report

Static analysis result for SHA-256 e2987319418e8bcb…

MALICIOUS

PDF

66.7 KB Created: 2021-03-01 14:02:51 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-23
MD5: 669857ae316c6b1ecd5fbd489533bba8 SHA-1: 11de8f26ab621784c3b7e7226264ed2f03e7c663 SHA-256: e2987319418e8bcba851c12823f9fc984baaf523b8794776e6113d3379e32677
186 Risk Score

Malware Insights

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

The PDF file contains numerous external links, many pointing to disposable domains, indicative of an SEO link farm or phishing campaign. The ML classifier and ClamAV detection strongly suggest malicious intent. While no scripts were explicitly extracted, the PDF structure and embedded URIs suggest it's designed to redirect users to potentially malicious content, likely for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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://seumenha.ru/wix?keyword=pa+emissions+recertification PDF link annotation
    • https://labajilawuja.weebly.com/uploads/1/3/1/4/131406369/muvupasegidol-nogujaselid-guwus-winegomekubi.pdfIn PDF document text
    • http://nelomevasusuf.22web.org/matapupop.pdfIn PDF document text
    • https://cdn.sqhk.co/solalokazili/Hjfjhje/65230731353.pdfIn PDF document text
    • http://guvinesusavilo.iblogger.org/balak_palak_full_movie_filmywap.pdfIn PDF document text
    • https://cdn.sqhk.co/zipirevofu/hgiaYgc/zudazafunosazomitosoke.pdfIn PDF document text
    • https://cdn.sqhk.co/kavonalitego/2jaGPif/riddles_with_answers_for_kids.pdfIn PDF document text
    • https://cdn.sqhk.co/karopepagu/XYhighi/world_war_iii_pc_game.pdfIn PDF document text
    • http://lixidavek.22web.org/54008843416.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/vutame/chloroform_solvent_nmr_peak.pdfIn PDF document text
    • http://zutibebasonuf.epizy.com/50579209838.pdfIn PDF document text
    • http://mopuser.epizy.com/gumakegokumatikite.pdfIn PDF document text
    • https://s3.amazonaws.com/vukujidor/handover_template_excel.pdfIn PDF document text
    • http://xuwunokebisul.rf.gd/endocarditis_reumatica.pdfIn PDF document text
    • https://s3.amazonaws.com/dedinavesute/how_to_improve_your_english_conversation_skills.pdfIn PDF document text
    • http://kazaxese.epizy.com/accountable_reimbursement_plan_template.pdfIn PDF document text
    • http://sonogobujajeva.rf.gd/romozejipefegojidelinuza.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000c7f4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC7F4 4996 bytes
SHA-256: 9f4e38d4d96388e7dab9848e88db1c5e294a53a3fc831e2eba58ecd17847cb06
font_01_sfnt_off0000d8dd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD8DD 10708 bytes
SHA-256: aafe28def848280cb4fad85703a28c9ced5b37cf673e0cace4f281ad864c2deb

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