Malicious PDF — malware analysis report

Static analysis result for SHA-256 2e3e2bed84416752…

MALICIOUS

PDF

80.2 KB Created: 2021-04-28 16:13:23 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-21
MD5: 30611218d8dbdada0d9073feb82e3d45 SHA-1: 3e8972a0a1d60620b4b7661a45b31008c9c10050 SHA-256: 2e3e2bed84416752d0638dc0a82084dbe7ce41d0b85ad593d669fd6d880c7a62
186 Risk Score

Malware Insights

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

This PDF file was flagged as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. It contains a large number of external links, many hosted on disposable domains, suggesting a link farm designed to redirect users to potentially harmful content. The presence of embedded URLs and the overall structure point towards a phishing or malware distribution scheme.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • 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 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.
  • 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=how+to+do+solid+writing+on+cricut PDF link annotation
    • http://help-lnstagramcopyrights-verify.com/300749623613x87q.pdfIn PDF document text
    • https://tonofoku.weebly.com/uploads/1/3/4/0/134096462/fomula.pdfIn PDF document text
    • https://dipofivebizog.weebly.com/uploads/1/3/2/7/132712563/2a095f8b93977.pdfIn PDF document text
    • https://voloripilobolim.weebly.com/uploads/1/3/4/6/134635915/zewitata-lujoburuj-gimani-fegur.pdfIn PDF document text
    • http://chestlune.online/24512197032m5j5o.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4448094/normal_6024f3b466ad8.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4420468/normal_605ad0d761564.pdfIn PDF document text
    • https://wezuzaxularo.weebly.com/uploads/1/3/1/4/131406207/24f94c1b2.pdfIn PDF document text
    • http://helpcontactform.com/tatiana_manaois_love_doesn_t_die_songn8cxj.pdfIn PDF document text
    • http://zalavsky.ru/27240853892dmori.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4504568/normal_6016ba8348413.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4471082/normal_5ff8dbead0656.pdfIn PDF document text
    • http://edapog.online/vasazogissdjif.pdfIn PDF document text
    • https://delovamubikener.weebly.com/uploads/1/3/4/7/134707073/1014586.pdfIn PDF document text
    • http://amsidgi.xyz/bubble_boy_diseaseno6dj.pdfIn PDF document text
    • https://nudabixe.weebly.com/uploads/1/3/4/5/134505388/rujanifozupavo.pdfIn PDF document text
    • https://kigazapaxulet.weebly.com/uploads/1/3/0/7/130774964/4b520.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://gevevobar.epizy.com/how_many_ounces_in_starbucks_cold_cup.pdfIn PDF document text
    • http://rojapaj.epizy.com/infective_endocarditis_treatment_nice_guidelines.pdfIn PDF document text
    • http://bopuxenuxesozu.rf.gd/adobe_illustrator_calligraphy_brushes_free.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_off0000fb6f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFB6F 4948 bytes
SHA-256: d4581ce6fbaa88900a737dccd7cceaa6c4c373c0ed810e48a02a702c7b6ba133
font_01_sfnt_off00010c66.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10C66 11540 bytes
SHA-256: 4fb52a9675d68a143913354705234680c5ba01aad583753fbe9041d9fb586bf4

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