Malicious PDF — malware analysis report

Static analysis result for SHA-256 d0b9a63632c04178…

MALICIOUS

PDF

73.3 KB Created: 2021-06-01 05:15:37 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 6386f79dccb09a077be467fcdc3b2fd4 SHA-1: cb24bb948645b59f1e88646ca214bc1f10b8eba5 SHA-256: d0b9a63632c041787e4e7de6600a10fd37ce20d8862c75991fab1f1bbb6fd5cd
184 Risk Score

Malware Insights

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

This PDF file exhibits characteristics of a phishing or malware distribution lure, employing a link farm strategy to redirect users to external sites. The document body, though heavily obfuscated, suggests a pretext related to a game registration code. The presence of numerous external links, many hosted on disposable domains, strongly indicates an attempt to lead users to malicious content or phishing pages. ClamAV detection as 'Pdf.Phishing.Trojan' further supports this assessment.

Machine Learning

  • Nyx PDF Classifier malicious score 0.6727

Heuristics 5

  • 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.
  • 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
  • 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://queure.ru/pbw?utm_term=need+for+speed+undercover+pc+game+registration+code
    • https://pusotovoxidelo.weebly.com/uploads/1/3/1/6/131637553/943133a4a.pdf
    • https://mubojage.weebly.com/uploads/1/3/4/3/134377346/falerededet-budelat.pdf
    • https://tiwenevudadag.weebly.com/uploads/1/3/4/7/134715745/5884080.pdf
    • https://kuvuwivozud.weebly.com/uploads/1/3/6/0/136091804/xaroxovimaroza_jorizigulo_rokid.pdf
    • https://xalusadi.weebly.com/uploads/1/3/4/5/134595224/binesadizugesaw_todifugabag_vizabiboguw_wadodidojox.pdf
    • https://rigavimiba.weebly.com/uploads/1/3/0/8/130814992/c50a3f76408.pdf
    • https://toxerixefekivi.weebly.com/uploads/1/3/5/2/135296371/gumuxugej.pdf
    • https://bexusisase.weebly.com/uploads/1/3/4/5/134596812/e48ee.pdf
    • https://bazewubudib.weebly.com/uploads/1/3/4/7/134731154/55a2641c7e.pdf
    • https://cdn-cms.f-static.net/uploads/4447278/normal_604ac7a16495b.pdf
    • https://static.s123-cdn-static-d.com/uploads/4486060/normal_60aff1d0b0b04.pdf
    • https://kefuvarunif.weebly.com/uploads/1/3/0/7/130739830/sofomogonomitusope.pdf
    • https://molilavavabofu.weebly.com/uploads/1/3/5/9/135989114/rakamositubisaxituk.pdf
    • https://sumikoxivabozo.weebly.com/uploads/1/3/3/9/133997645/0b417821b6f872.pdf
    • https://cdn-cms.f-static.net/uploads/4497110/normal_6017c1dfe6c66.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://jesababa.pbworks.com/w/file/fetch/144424917/23559345681.pdf
    • http://viluxese.pbworks.com/f/new_construction_final_walk_through_checklist_template.pdf
    • http://zuvevetub.pbworks.com/w/file/fetch/144421668/zitejedo.pdf
    • http://poforezufovu.pbworks.com/w/file/fetch/144434871/secret_life_of_bees_chapter_13_quotes.pdf
    • http://negovijalulu.pbworks.com/w/file/fetch/144415533/hypertensive_emergency_guidelines_jnc_8.pdf
    • http://siwuromo.pbworks.com/w/file/fetch/144425412/pavagada_solar_park.pdf
    • http://fufitiruw.pbworks.com/w/file/fetch/144426090/xojavudubedatiwuzu.pdf
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e659.bin
e2b6fe9d233dd60a4d94b6edb66c3125a05f817c1a2d4e6abdcab0e53db865c6		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE659 5352 bytes
font_01_sfnt_off0000f87c.bin
e7d8ed1d2b1d8f76ea208cdfdc26b4aefe0af42b66747b83aa4434a38b1e01a8		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF87C 10856 bytes

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