Malicious PDF — malware analysis report

Static analysis result for SHA-256 3e9fc0449df7b0e6…

MALICIOUS

PDF

93.4 KB Created: 2021-02-17 11:23:20 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: b3aeba9c1ae414aa4acbb401811570ce SHA-1: 115d7cf1b2bc0a953806048035709d3aa3e5202a SHA-256: 3e9fc0449df7b0e648f37e74d14c665a10a8226727abda6a3c4eb1ee0eea3592
156 Risk Score

Malware Insights

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

The PDF document contains a large number of external links, identified as a 'PDF link farm'. One of the embedded URLs, 'https://seumenha.ru/wix?keyword=htv+market+apk', suggests a lure related to downloading an APK, possibly for mobile devices. The ClamAV detection and ML classifier strongly indicate malicious intent, likely related to phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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
  • 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/wix?keyword=htv+market+apk
    • https://cdn.sqhk.co/bafesugoguwi/0ygehbZ/steam_chat_logs_recovery.pdf
    • https://cdn.sqhk.co/gujadozede/jicbhgR/thoroughly_modern_millie_characters.pdf
    • https://cdn.sqhk.co/gemadaruvow/X5gd5QG/11736359765.pdf
    • https://cdn.sqhk.co/nazopekujavi/Bhbfgcf/fish_aquariums_and_stuff.pdf
    • https://cdn.sqhk.co/dexavoba/ULqpheS/85304545006.pdf
    • https://static.s123-cdn-static.com/uploads/4458829/normal_5fec077918551.pdf
    • https://fusufuxono.weebly.com/uploads/1/3/1/6/131606103/jadinejifezodu_biguzinelul_rivipologaxoru_tomekavakuf.pdf
    • https://cdn.sqhk.co/kitatoze/XSjdDeD/1092464414.pdf
    • https://xizirogubo.weebly.com/uploads/1/3/0/7/130776043/4682904.pdf
    • https://cdn.sqhk.co/levowexesu/gOieSA1/24152868321.pdf
    • https://cdn.sqhk.co/nedupugifuka/EhhGhfh/patikawebilelenupibusu.pdf
    • https://cdn-cms.f-static.net/uploads/4465907/normal_6023ed8614b0f.pdf
    • https://naxetiluwe.weebly.com/uploads/1/3/1/4/131483002/71a2bab8bf4559.pdf
    • https://cdn.sqhk.co/jifedibodo/gj4unhf/dollar_tree_dakota_winnipeg_hours.pdf
    • https://cdn.sqhk.co/kenipafitu/zThhmic/royal_defense_king_mod_apk_download.pdf
    • https://kaferafodi.weebly.com/uploads/1/3/0/7/130775544/1516b1aa44.pdf
    • https://cdn.sqhk.co/nejibija/gdT9Ggi/tesewexavo.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://wurunepoxu.rf.gd/savapixobojidevudebukez.pdf
    • http://fazufunove.rf.gd/pukopubapaguwewabubipirez.pdf
    • http://serinuzosazojup.epizy.com/crusaders_quest_manacar_guide.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0001137b.bin
2d41bb18b78f9f421772446c2455620245cd6a160234d03809958453e3ea7683		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1137B 4840 bytes
font_01_sfnt_off000123dd.bin
f879803a428eb7f506c68f833bb026e79fc2637b3a265fb81723854ede78478c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x123DD 15844 bytes
font_02_sfnt_off000153c8.bin
e2b340c24645249167db920fc306cca255b7293b0829f8d33083aeb256902ca1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x153C8 16084 bytes

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