Malicious PDF — malware analysis report

Static analysis result for SHA-256 96b99cb1e2f11f55…

MALICIOUS

PDF

81.9 KB Created: 2020-12-25 20:24:55 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-14
MD5: 3e11f141c29fd0f666b3e3afe9a9702f SHA-1: 1e327797867fc60c1b70770268383205dc204008 SHA-256: 96b99cb1e2f11f55eb106033dd1a2b0d3882c199b970c61d4bec3437b2cbef88
156 Risk Score

Malware Insights

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

The PDF contains a large number of external links, many of which point to potentially malicious domains, indicating a link farm designed to distribute malicious content. The ClamAV detection and ML classifier strongly suggest this PDF is a phishing or malware delivery vehicle. No scripts were extracted, but the embedded URLs are the primary indicators of malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://trafffe.ru/123?utm_term=frayer+model+pdf PDF link annotation
    • https://fugomunufu.weebly.com/uploads/1/3/4/5/134586131/kozivota-raledivev-mosumuvam.pdfIn PDF document text
    • https://nijawefevijabit.weebly.com/uploads/1/3/4/6/134665626/8371951.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4415302/normal_5f9a2f34334fe.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4447915/normal_5fc3340186a5c.pdfIn PDF document text
    • https://gozofuma.weebly.com/uploads/1/3/0/8/130874065/sikalomasojo.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4422144/normal_5fb9fb2c499b8.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4417205/normal_5faa1e36d68f7.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://uploads.strikinglycdn.com/files/439b0fd1-eb49-4990-ba0d-1b771dc8719d/stickman_legends_shadow_of_war_fighting_games.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9113efce-0068-4286-8173-b2c13ad7f195/kaprosuchus_saharicus_fossil.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/fc87e4a6-436c-49e8-902a-b6c94fdd6a62/7880586086.pdfIn PDF document text
    • https://s3.amazonaws.com/gezetega/bcece_admit_card_2019.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f8aa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF8AA 4620 bytes
SHA-256: 3c34132ec9ca82a7201ca5cf7223bff96f3ac339f2ed60b44337cbf713b6ff32
font_01_sfnt_off00010869.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10869 10672 bytes
SHA-256: f383cd29836368fddde71f00a9a7d218fc39c9cc5ad56325f3e595151f6c1d1b
font_02_sfnt_off00012cc9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12CC9 4324 bytes
SHA-256: 1062cd8ddf90f4344fa193b395386d5669df1a952e5759311ca261a71931f361

Open this report in the interactive analyzer, or submit your own file for analysis.