Malicious PDF — malware analysis report

Static analysis result for SHA-256 ae1945f092a8bead…

MALICIOUS

PDF

64.8 KB Created: 2020-12-25 15:41:52 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: d4b2bf6673a7482c2ed20b4f3d91e430 SHA-1: 6c16b9d424e260cc0a4f308771eb7f081fba1ba9 SHA-256: ae1945f092a8bead8c218e927e8a9a8fa122f6c3aa29a880f58d7f24b2ecc077
156 Risk Score

Malware Insights

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

The PDF file contains numerous external links, a common tactic for SEO poisoning or phishing. The embedded URLs and the heuristic 'PDF_SEO_LINK_FARM' indicate a strong attempt to redirect users to malicious or deceptive websites. The ClamAV detection and ML classifier further support its malicious nature, likely as a phishing or trojan delivery mechanism.

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 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.
  • 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://trafficel.ru/wb?keyword=texas%20holdem%20poker%20game%20boy%20advance%20rom PDF link annotation
    • https://dujizajep.weebly.com/uploads/1/3/4/7/134704211/sarerogonigul.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4404503/normal_5fc67b2476e65.pdfIn PDF document text
    • https://menolalosixoj.weebly.com/uploads/1/3/4/7/134714047/9510864.pdfIn PDF document text
    • https://babikovinemixe.weebly.com/uploads/1/3/1/8/131856339/8543106.pdfIn PDF document text
    • https://gizajowi.weebly.com/uploads/1/3/4/3/134314542/7295515.pdfIn PDF document text
    • https://xomitemekebok.weebly.com/uploads/1/3/4/8/134881854/4a77ab.pdfIn PDF document text
    • https://cdn.sqhk.co/salenasova/jdicjh8/fastest_lap_racing_manager_mod_apk.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4447087/normal_5fdc73c01d99d.pdfIn PDF document text
    • https://kixatefibav.weebly.com/uploads/1/3/0/7/130776592/dcf3354424f9.pdfIn PDF document text
    • https://cdn.sqhk.co/kevejonob/Njehcje/43602366019.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/divexikav/andover_mills_outdoor_rugs.pdfIn PDF document text
    • https://s3.amazonaws.com/novipaliwid/jorufajomag.pdfIn PDF document text
    • https://s3.amazonaws.com/jezaxojipevu/practical_problem-_solving_skills_in_the_workplace.pdfIn PDF document text
    • https://s3.amazonaws.com/tinajabizoreguf/act_3_romeo_and_juliet_study_guide_answers.pdfIn PDF document text
    • https://s3.amazonaws.com/mukut/calvary_hillsong_chords.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_off0000bc02.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBC02 5868 bytes
SHA-256: 79f57b68e4e7721ea24bdc9e9d4ce19a7ff8ab0b34ea2e849caef0f7d0c3d4f7
font_01_sfnt_off0000cfdc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCFDC 11076 bytes
SHA-256: 329d50fe612827b09622349e43377505ad74a7915ba9a6911d7354e1c1f50db5

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