Malicious PDF — malware analysis report

Static analysis result for SHA-256 7d69cc65e32668d6…

MALICIOUS

PDF

84.4 KB Created: 2021-10-05 18:01:32 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-24
MD5: c7c31e47f571dca83a8b6dff209112bb SHA-1: f0a3c22bbeaa1dd8063e2efd316592ab2d5ea571 SHA-256: 7d69cc65e32668d6bd2a01fbb525cf34b4bbea4178dcf3ce35e5dd0bece4e7da
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF was flagged by ML classifiers and ClamAV as malicious, exhibiting characteristics of a phishing or malware distribution lure. It contains numerous external links, with a significant number pointing to potentially disposable domains, suggesting a link farm or redirection strategy. While no scripts were explicitly extracted, the PDF structure and heuristic firings indicate it is designed to redirect users to external content, likely for malicious purposes.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9860

Heuristics 5

  • 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 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 http://kaies.net/upfiles/file/16154500636.pdf In PDF document text
    • http://datcat.vn/2018/file/sumifenosuvogum.pdfIn PDF document text
    • http://minhphucvietnam.com/uploads/userfiles/file/132982988.pdfIn PDF document text
    • http://www.prctech-th.com/ckfinder/userfiles/files/witesiwotewesenifaz.pdfIn PDF document text
    • http://sculecuacumulator.ro/app/webroot/files/userfiles/files/30473549112.pdfIn PDF document text
    • http://dialog-seversk.ru/jsplugins/ckfinder/userfiles/files/92474679178.pdfIn PDF document text
    • https://812423.qqtogeljackpot2.com/contents/files/topopubuziwenibozule.pdfIn PDF document text
    • http://4bx.pl/public/file/pazedixusonagajodas.pdfIn PDF document text
    • https://beautyyaurient.com/editor_upload/file/94045859245.pdfIn PDF document text
    • http://maility.pl/_ADRESuserfiles/file/81888935773.pdfIn PDF document text
    • http://gordostcrista.ru/userfiles/file/38162963886.pdfIn PDF document text
    • https://divinenine.net/userfiles/file/fatibuki.pdfIn PDF document text
    • https://churchosonline.com/wp-content/plugins/super-forms/uploads/php/files/5420fcec79fea492d94c14d5e45182c9/40646628676.pdfIn PDF document text
    • http://minhledtran.com/luutru/files/59487983349.pdfIn PDF document text
    • http://lideparts.com/userfiles/file/1631353648.pdfIn PDF document text
    • https://0a3exp.com/upfiles/editor/files/39242810143.pdfIn PDF document text
    • http://meteoratourismactivities.com/files/files/bobasajuxamedatodimu.pdfIn PDF document text
    • http://dialog-seversk.ru/jsplugins/ckfinder/userfiles/files/64591769278.pdfIn PDF document text
    • http://jyotiacademicpress.org/uploads/file/vikuna.pdfIn PDF document text
    • http://www.pvvc.cz/files/42294627364.pdfIn PDF document text
    • https://mysilofr.mysilo.com/upload/ckfinder/files/14196750394.pdfIn PDF document text
    • http://hiro-seiko.com/upload/files/pefunene.pdfIn PDF document text
    • https://www.hauptsache.cc/wp-content/plugins/formcraft/file-upload/server/content/files/161409135b4b00---7875687760.pdfIn PDF document text
    • https://f27szerviz.hu/upload/files/radasirefaju.pdfIn PDF document text
    • http://qwerty.pl/_data/file/tidujavenujivika.pdfIn PDF document text
    • https://premiersuli.hu/files/files/vepotikog.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/1KS0DP0cxss/uplcv?utm_term=how+to+remove+plastic+tag+from+new+clothesPDF link annotation
    • 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://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ded1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDED1 11072 bytes
SHA-256: a87a123440ae1be2f6d275e925a481038067f976d2bc418ee11e23ff78996e3e
font_01_sfnt_off0000f872.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF872 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00011084.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11084 19572 bytes
SHA-256: 39540a1856fe813b30f8a12927736207f25685f6803a6f29fa7fa3ea8a9f6c76