Malicious PDF — malware analysis report

Static analysis result for SHA-256 030cf436922e81d6…

MALICIOUS

PDF

72.5 KB Created: 2021-02-20 09:52:51 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-23
MD5: 142b6a37a2e8695ac0c868300f9cbaae SHA-1: e19a512b23ac664fff4ad40dedf685275d91281c SHA-256: 030cf436922e81d66bd3d07e08d800ab2a6db3699e59529c2f062ca5dcbd9992
126 Risk Score

Malware Insights

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

The PDF contains numerous external URLs, many hosted on disposable domains, indicating a link farm designed to redirect users. The ML classifier and ClamAV detection strongly suggest malicious intent, likely phishing or malware delivery. Although no scripts were explicitly extracted, the PDF structure and embedded URIs are consistent with techniques used to redirect users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://maypoin.ru/wix?keyword=tf2+guides+steam PDF link annotation
    • https://cdn.sqhk.co/xetilibul/ihCDAgO/kiwikotekunopew.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4476301/normal_5ff5dedbde283.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4451348/normal_5ff6607f7fcb9.pdfIn PDF document text
    • http://disclosures.space/6939808947n6pk9.pdfIn PDF document text
    • https://cdn.sqhk.co/xakurusuk/aRjfhg9/gaton.pdfIn PDF document text
    • http://lovemecompletely.com/562444352059uia3.pdfIn PDF document text
    • https://cdn.sqhk.co/jogekiluse/jbhgOM4/14352926694.pdfIn PDF document text
    • https://cdn.sqhk.co/bipujawojeli/iiBibjf/printable_maze_worksheets_for_kindergarten.pdfIn PDF document text
    • http://henrysavbr.site/118492988702wi6d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4414360/normal_600ab2353b543.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4484804/normal_5fc79f4ab03ee.pdfIn PDF document text
    • http://2gusevshop.space/country_dance_violin_sheet_musichano9.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4489052/normal_600acd6f1b2ea.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4485699/normal_5fda7ace07801.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4378848/normal_5ffdd9f6e171e.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://kesobikifa.epizy.com/rikoperazugubezobibuwe.pdfIn PDF document text
    • http://guvamimifufirar.rf.gd/75312552548.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_off0000dca9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDCA9 5180 bytes
SHA-256: 39a1ea3471eb180e4632cc1adad6de7cc237381b71bc71276025ec54bd895ab4
font_01_sfnt_off0000ee42.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEE42 11064 bytes
SHA-256: 9cee683fedf1af87c82e8324d09f876b5440356ac9dae2fde973df697f6fdf67

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