Malicious PDF — malware analysis report

Static analysis result for SHA-256 e13054faf46d18ff…

MALICIOUS

PDF

77.7 KB Created: 2021-02-22 01:19:09 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-16
MD5: 7c2ab73e6240c3582411119056d63076 SHA-1: d96c3647f2e8f0ec225aa08cd4e3e8f2474c6c15 SHA-256: e13054faf46d18ffa3599bb25bed0e90daf44f3c75e2340ab34cdaca7b9cb877
186 Risk Score

Malware Insights

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

The PDF contains a large number of external links, many hosted on disposable domains and link farms, indicating a likely SEO-based phishing or ad fraud scheme. The ClamAV detection and ML classifier strongly suggest malicious intent. While no scripts were explicitly extracted, the PDF structure and numerous external URLs point towards a malicious redirection or content-loading mechanism, potentially leveraging embedded JavaScript for obfuscation or execution.

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://leonvi.ru/strik?utm_term=how+to+stop+my+call+forwarding PDF link annotation
    • https://cdn.sqhk.co/fesakesovoka/cyeSTm6/battery_tender_charger_manual.pdfIn PDF document text
    • https://posijakafit.weebly.com/uploads/1/3/5/3/135320461/tabutukubenet_dililot_dagitixojuse_wefod.pdfIn PDF document text
    • https://cdn.sqhk.co/pajijolabalu/cRxgijj/51194666809.pdfIn PDF document text
    • https://cdn.sqhk.co/soxuwutitaw/ajBkuOw/zombie_frontier_sniper_mod_apk_uptodown.pdfIn PDF document text
    • https://cdn.sqhk.co/dederubap/jiWLiaC/luke_bryan_wife_ring.pdfIn PDF document text
    • https://sitegevom.weebly.com/uploads/1/3/4/6/134664280/purex_xepuwobamadomo_davakosikefi_galukoxiv.pdfIn PDF document text
    • http://diniwesavaku.iblogger.org/bibojigelem.pdfIn PDF document text
    • https://widafesisitix.weebly.com/uploads/1/3/5/3/135321065/tivudozegexujudis.pdfIn PDF document text
    • http://sikagez.22web.org/85060669872.pdfIn PDF document text
    • https://wodokapiv.weebly.com/uploads/1/3/4/5/134584818/4290653.pdfIn PDF document text
    • https://cdn.sqhk.co/lixozimiz/06gcUTf/claw_machine_for_sale_philippines.pdfIn PDF document text
    • https://cdn.sqhk.co/pakelabete/Ghejbic/wetagemu.pdfIn PDF document text
    • https://cdn.sqhk.co/surikuzezun/fZJhdGS/the_big_crossword_puzzle_thanksgiving_answers.pdfIn PDF document text
    • https://fezinonod.weebly.com/uploads/1/3/1/0/131070080/5908947.pdfIn PDF document text
    • http://gefakusudob.22web.org/81610500660.pdfIn PDF document text
    • https://cdn.sqhk.co/pubodegosog/Whhjgja/roi_world_cup.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn 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_off0000f27f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF27F 5632 bytes
SHA-256: 10219f39459dec7541469cb41703f3d6362960ee3a91a5cc492321cdfd5415dc
font_01_sfnt_off000105a8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x105A8 10560 bytes
SHA-256: 878329c4713742ca8f586abca257ae632e39593d9665f118028be602eae5461b

Open this report in the interactive analyzer, or submit your own file for analysis.