Malicious PDF — malware analysis report

Static analysis result for SHA-256 70382788d1e44478…

MALICIOUS

PDF

78.9 KB Created: 2021-05-06 22:49:12 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 90cee224bbbcf03f37ceacaf9a97c786 SHA-1: 2c117590f6467e0615a9a0d1c32cc19c5a476c23 SHA-256: 70382788d1e444787da6cdf3ed86a1309c7e38bfaedd7e879f78a0048423fc58
156 Risk Score

Malware Insights

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

The PDF contains numerous external links, with a critical heuristic identifying it as a link farm. One prominent URL, 'https://vilenefex.ru/strik?utm_term=how+to+pair+onn+tv+with+xfinity+remote', suggests a phishing or scam attempt by disguising malicious links under a common search query. The ClamAV detection and ML classifier further indicate malicious intent, likely related to phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://vilenefex.ru/strik?utm_term=how+to+pair+onn+tv+with+xfinity+remote
    • http://dazavaluk.mygamesonline.org/31929976869.pdf
    • https://cdn-cms.f-static.net/uploads/4464067/normal_601903de6432c.pdf
    • https://cdn.sqhk.co/tipefimex/bihiahi/nulom.pdf
    • https://cdn.sqhk.co/tosuwukiwate/bNhcXje/gameboy_sp_ebay.pdf
    • http://fafuzum.sportsontheweb.net/boporidaxufexiruribo.pdf
    • https://cdn.sqhk.co/jizejotuwoz/LRhijjG/digital_world_adventure_evolution_guide.pdf
    • https://cdn.sqhk.co/bimepefav/javhjjj/betebem.pdf
    • https://cdn-cms.f-static.net/uploads/4492901/normal_6039267f06a3e.pdf
    • http://kezosod.iblogger.org/nixuwojurikitarot.pdf
    • https://cdn.sqhk.co/xunixenovapi/YJNitgg/16333586920.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://42190e62-4dca-482d-a077-ae7b222d7779.filesusr.com/ugd/b91392_26f3a56657e44e4c9d218c3183bbf123.pdf?index=true
    • http://pugobafujopelat.epizy.com/demon_souls_trophy_guide.pdf
    • http://dizebumik.rf.gd/pizisoxanegodud.pdf
    • http://jefusebu.epizy.com/blockbuster_dj_dance_mix_song.pdf
    • http://tuzufuwav.rf.gd/berserk_of_gluttony_novel.pdf
    • http://lurolubudoruk.onlinewebshop.net/10479791406.pdf
    • http://nalafovop.rf.gd/polemixabusufazelo.pdf
    • http://vesevujivodekut.epizy.com/senior_accounting_officer_report.pdf
    • http://gorefoverotiw.epizy.com/xosadelamagebav.pdf
    • https://59cf682b-6680-4a08-8b8d-0472bab64ef7.filesusr.com/ugd/d7d6cd_95126c7868ad412fbe52c8a76ceab5ff.pdf?index=true
    • 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

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f72f.bin
48a49478a612495e90387f171e9db7c3f575ebd7d9e9b87cef51259629dd17e2		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF72F 5216 bytes
font_01_sfnt_off000108e6.bin
6ebba53b8c40dd37087b5246e4a055b15b4f1bc6ca5b7a3fadba0cf9b1939636		 pdf-font-stream PDF embedded font (sfnt) at offset 0x108E6 10860 bytes

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