Malicious PDF — malware analysis report

Static analysis result for SHA-256 d2e0c6f6d760725f…

MALICIOUS

PDF

81.9 KB Created: 2021-03-31 22:48:48 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-24
MD5: 88c02fdfb0f08376f2510946e3029aea SHA-1: 4ac8a6eb948913aafcfe460885eb5ca943578b15 SHA-256: d2e0c6f6d760725f71f8cd9b05a37a8875bf5290deb56e7a76cd93a71203abe5
126 Risk Score

Malware Insights

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

The PDF file contains numerous embedded URLs, with one prominent URL leading to a suspicious domain ('vilenefex.ru') disguised as a movie trailer link. Heuristics indicate the PDF is a link farm on disposable hosting, and ML classifiers and ClamAV strongly flag it as malicious, specifically as a phishing trojan. The presence of embedded JavaScript, though not fully detailed, suggests an attempt to execute malicious code or redirect the user.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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
  • 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=robin+hood+movie+2010+trailer PDF link annotation
    • https://cdn.sqhk.co/wevubuse/aREmif7/sevogaji.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4366367/normal_60064a427e415.pdfIn PDF document text
    • http://reduslimer.website/tutekutotivunabx8zru.pdfIn PDF document text
    • http://xovebud.mygamesonline.org/rinnai_infinity_11i_installation_manual.pdfIn PDF document text
    • http://dimozakebaba.scienceontheweb.net/how_to_delete_facebook_account_2020_ios.pdfIn PDF document text
    • https://cdn.sqhk.co/misusulebix/N9ghieG/jefogekikolemofo.pdfIn PDF document text
    • https://cdn.sqhk.co/xasexuwosul/iajchhq/xidiwarov.pdfIn PDF document text
    • http://profyhouse.ru/87197107523m4w95.pdfIn PDF document text
    • http://gagimubu.mywebcommunity.org/ossaa_fastpitch_softball_bat_rules.pdfIn PDF document text
    • http://xozonline.ru/mudelesavuxowidixuduxeze0lm7e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4461770/normal_602acadf5bae6.pdfIn PDF document text
    • http://sputnews.com/hybrid_costing_system5ogcy.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4389586/normal_6002d2f5e8bd7.pdfIn PDF document text
    • https://cdn.sqhk.co/sopiloroda/WLjfkJL/80972041157.pdfIn PDF document text
    • http://olipaka.xyz/create_apple_id_in_androidf1pcs.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4470412/normal_5fe7736cbde91.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/b7df0882-3a7d-4044-92a8-f310a802c92b/52703198674.pdfIn PDF document text
    • http://kapowuxivi.atwebpages.com/business_model_canvas_a4.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c1d4ca8e-5678-47cd-aafb-6125975eb5d1/sewesunegalenimafu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7f62fb46-38e5-4fa0-832c-0c696ad0ee5e/ultimate_birthday_book_new_york_times.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ceb3e3f1-da89-4f9f-851a-4ed5fb3855ae/how_to_check_call_history_panasonic.pdfIn PDF document text
    • http://luvetux.myartsonline.com/aditya_hridaya_stotra_path.pdfIn 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_off00010036.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10036 5420 bytes
SHA-256: 36230b5ed9f8f7c5aa1d26453c5264c547a1b8be03fe0e0919c703b438ece647
font_01_sfnt_off0001127b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1127B 11688 bytes
SHA-256: 87b5c70391ef4e1ef3246c708c713891c6eff083006d8ed1187fa9fe2360e4b1

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