Malicious PDF — malware analysis report

Static analysis result for SHA-256 d4e2d8cde197125b…

MALICIOUS

PDF

77.1 KB Created: 2021-03-17 04:00:32 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-22
MD5: 8c3e908699ec5b30f061fa530ab09997 SHA-1: 88dce1513d4b0e96416761d451bc653fa1a85fb0 SHA-256: d4e2d8cde197125be9657b485f7806d5caa1489e24dca6e86582c01a09fce939
126 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ML classifiers and ClamAV, indicating a phishing or trojan payload. It contains numerous embedded URLs, with one prominent URL pointing to 'mezovuduw.ru', suggesting a phishing lure. The PDF's structure and the presence of external links indicate it's designed to redirect users to malicious content, likely for credential harvesting or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://mezovuduw.ru/strik?utm_term=what+are+the+strengths+of+a+correlational+study PDF link annotation
    • https://cdn.sqhk.co/rigidaluta/F8Bhjhe/51253466943.pdfIn PDF document text
    • http://copyrightmediahelp.com/faux_calligraphy_alphabet_worksheetsi58kb.pdfIn PDF document text
    • https://cdn.sqhk.co/jimavidozeze/6jdiiO0/turbo_racer_3d_mod_apk.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4443325/normal_600e87739d92e.pdfIn PDF document text
    • https://cdn.sqhk.co/libobivole/iiidiik/arcade1up_galaga_machine_review.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4404292/normal_5ff6d31f6b6f2.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4421466/normal_5fd670c6d78b5.pdfIn PDF document text
    • http://bufo.online/601719334190fdh9.pdfIn PDF document text
    • http://piredvizhnik.com/gitumikifaxewebuxofapesokrowgx.pdfIn PDF document text
    • https://lorivomewojesab.weebly.com/uploads/1/3/0/8/130813497/lafubunelan-tibogaxi.pdfIn PDF document text
    • http://republvinb.fun/amen_break_free3e91n.pdfIn PDF document text
    • https://vixadabunukup.weebly.com/uploads/1/3/4/9/134902839/260908.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://22e365c6-0853-42e1-82f8-83473bf9c0bf.filesusr.com/ugd/217d68_28d051cc71504a79ae73406982ade433.pdf?index=trueIn PDF document text
    • https://748f1d53-d141-46c1-926a-d14fc69713a3.filesusr.com/ugd/e3ed1f_193c0f1866934e7588374b4da1b4cf5a.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/wajibile/rayagada_express_platform_number.pdfIn PDF document text
    • https://s3.amazonaws.com/sorogamat/zigujenuz.pdfIn PDF document text
    • https://636e06b3-920c-4898-b827-ef778bbbc101.filesusr.com/ugd/40512e_2978eaf87ab14e3eac996a130a5f425e.pdf?index=trueIn 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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e223.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE223 5280 bytes
SHA-256: d35886513390998ebfa5ae8345a10cff279fe117f79e806fdcf90a2687da42bb
font_01_sfnt_off0000f41d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF41D 10692 bytes
SHA-256: 8e047d1d32f64db008dfb0a4e3a061ef2d5cb8e4f38f70e34984639f4d1b391c
font_02_sfnt_off000118db.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x118DB 4324 bytes
SHA-256: cd94ef65598b1866d0653cdd88243d989fd81359c0e770c2d3a4858f1c2f6d34

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