Malicious PDF — malware analysis report

Static analysis result for SHA-256 080a79a2e733641b…

MALICIOUS

PDF

76.5 KB Created: 2021-04-24 13:44:14 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: b17e7892fa9a3e98daadc763d50fdab6 SHA-1: 1eef9d4aef260f3225b35badda10885d2f831a05 SHA-256: 080a79a2e733641b4c78b6e8d839542e0548e93d6cf2bf20b45c5949224b1fd9
156 Risk Score

Malware Insights

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

This PDF document was identified as malicious by multiple heuristics and an ML classifier, specifically flagged as a phishing trojan. It contains a large number of external links, indicating it functions as a link farm for SEO purposes. The primary URL, 'https://seumenha.ru/strik?utm_term=how+to+make+a+good+rap+song+reddit', suggests a lure to content related to rap music, likely a deceptive tactic to drive traffic to potentially harmful sites.

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://seumenha.ru/strik?utm_term=how+to+make+a+good+rap+song+reddit
    • https://static.s123-cdn-static.com/uploads/4413363/normal_5fee82b3bbb81.pdf
    • https://cdn.sqhk.co/kizofapekeku/gjd4sha/kuvufepepalevop.pdf
    • https://cdn.sqhk.co/jexerigix/lvjevgj/57217439488.pdf
    • https://cdn.sqhk.co/pakiwujipubi/decx3hh/roommate_apartment_contract.pdf
    • https://cdn.sqhk.co/vefuwebilux/9X0hdhi/funny_status_for_whatsapp_for_friends.pdf
    • https://cdn.sqhk.co/ridijafugemi/Kjggin2/chicken_gun_mod_menu_1._9._9.pdf
    • https://static.s123-cdn-static.com/uploads/4407994/normal_5fed1eb2b56ee.pdf
    • https://cdn.sqhk.co/zuzipogowita/kjdYta8/zogozobejapif.pdf
    • https://cdn-cms.f-static.net/uploads/4476432/normal_602370758c0fa.pdf
    • https://cdn-cms.f-static.net/uploads/4393193/normal_60405e9125cd8.pdf
    • http://mefizilexofe.66ghz.com/civilization_6_gathering_storm_epic_games_key.pdf
    • https://cdn.sqhk.co/fijajiles/HnHiahc/jurojuwejilinabuvoroti.pdf
    • https://tubenuluni.weebly.com/uploads/1/3/1/4/131437864/zapusu-pobetesadevagol.pdf
    • http://basomivunowa.22web.org/canal_de_garonne_guide.pdf
    • https://cdn.sqhk.co/xadowififux/cDjh9gc/sidoxawatukutezuxud.pdf
    • https://fiwebafifike.weebly.com/uploads/1/3/4/8/134885554/folinebiwisobeluj.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://7ae52be2-ba3c-41fb-8935-29281088223e.filesusr.com/ugd/affaa6_3221a1330fd04cab85c2260ea74e7e97.pdf?index=true
    • https://981168d4-05fc-44b6-871d-73371d7e8cf1.filesusr.com/ugd/87d215_d645565f1ab84fb988fa48562c0049cc.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_off0000eb14.bin
d80d6a38c6b109e861b07de4d729e0ddad1020075f5e68f614c9b7b4c5e88c53		 pdf-font-stream PDF embedded font (sfnt) at offset 0xEB14 5364 bytes
font_01_sfnt_off0000fd49.bin
1b41d30c50588d36b4335360c696c2e9794ea2597b9dfeaa77feaf5d7f17fd56		 pdf-font-stream PDF embedded font (sfnt) at offset 0xFD49 11004 bytes

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