Malicious PDF — malware analysis report

Static analysis result for SHA-256 9ad2e60e501e8a7b…

MALICIOUS

PDF

71.9 KB Created: 2021-04-17 19:43:37 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-25
MD5: d4ec8435cff6c00a9505930601836294 SHA-1: 4c7dbb319ff5677b3fdd7f2d85dbaf3b406ff54c SHA-256: 9ad2e60e501e8a7b194c22f5e67e0851a83e2e8bc2bbe2c8513890f20f88acd4
156 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

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 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.
  • 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/strik?utm_term=tai+chi+qigong+18+forms PDF link annotation
    • https://jefelowomiwit.weebly.com/uploads/1/3/4/5/134599681/duturew-nobugojutoruw.pdfIn PDF document text
    • http://xifamopituwoti.iblogger.org/nujifobudoramovapilujug.pdfIn PDF document text
    • https://cdn.sqhk.co/terodekijur/cjZjf9L/94031218123.pdfIn PDF document text
    • https://zetojaxonafavop.weebly.com/uploads/1/3/5/3/135309172/jesixedotitodu_tanukuwaso_bemuzobejaj_geporudarabuwen.pdfIn PDF document text
    • https://venewosusi.weebly.com/uploads/1/3/1/3/131398385/fusokasadoziv.pdfIn PDF document text
    • http://rexirututesopew.iblogger.org/adobe_premiere_pro_cs5_plugins_free.pdfIn PDF document text
    • https://cdn.sqhk.co/fejezolixo/qhfbhcC/edit_picture_in_word_template.pdfIn PDF document text
    • https://cdn.sqhk.co/vorinugobol/eUw4vXL/land_conquering_games.pdfIn PDF document text
    • https://cdn.sqhk.co/kopilixa/rih44if/zurulukisaxajavawefam.pdfIn PDF document text
    • https://cdn.sqhk.co/revipidamog/7wjgY9M/beard_salon_singapore.pdfIn PDF document text
    • https://cdn.sqhk.co/vevajewez/btichhi/infinite_tiles_be_fast_apk.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/d13a2654-8d7f-4539-ba55-d929751f2c50/89229136940.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2f6e0489-ff5e-453b-841e-a25a062af1b8/ejemplos_de_guion_de_teatro_para_nios_cortos.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b642c169-a39b-43be-a99e-a57488940682/dopabibavuwoza.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/cd8986f6-4db0-433f-90d9-edd674e72ad1/18308393748.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3c57950a-28a2-4351-a05a-0bd02137c179/sony_rx10_vs_rx100_iv.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c20f790f-4d7d-46d6-8f07-485bcddc6d7f/pugono.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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000dbde.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDBDE 5584 bytes
SHA-256: 4356b38cd7ebb92ef4ee7a9780548b6858dd89892e4fb66a1afdf3b9d1e85937
font_01_sfnt_off0000eeb9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEEB9 10772 bytes
SHA-256: 34b7a8e31de6e221224c0ac90492e6df0945d4b590667d2c8fe2464b7e18b27d

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