Malicious PDF — malware analysis report

Static analysis result for SHA-256 f11b4f46205620f7…

MALICIOUS

PDF

83.4 KB Created: 2020-12-15 20:55:03 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: fd01903115b97b91f02337114aa1f0d4 SHA-1: d52a01fb7c773570607893c49ca0159fb393b9d0 SHA-256: f11b4f46205620f70679c267479a27bcd1c2b9933deba3cc97709efb4615e60e
214 Risk Score

Malware Insights

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

The PDF contains a link to a known malicious redirector, disguised with a search query for '16 inch tires for sale near me'. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or malware distribution. Although no scripts were explicitly extracted, the PDF structure and embedded malicious URL are sufficient indicators of a phishing attack.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

Heuristics 5

  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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.
  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://cctraff.ru/123?utm_term=16+inch+tires+for+sale+near+me
    • https://nedetuvozuwe.weebly.com/uploads/1/3/4/6/134699612/1441117.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://static1.squarespace.com/static/5fbce344be7cfc36344e8aaf/t/5fbf4cc27acac6192ab71981/1606372546856/x_intercept_calculator_linear_equation.pdf
    • https://static1.squarespace.com/static/5fce07212ee13227da65acf0/t/5fced94c798354522dff62f5/1607391566934/art_therapy_degree_melbourne.pdf
    • https://uploads.strikinglycdn.com/files/d4f14d6d-b039-4df1-9871-0cadd6e8533c/vewaxopamenifof.pdf
    • https://static1.squarespace.com/static/5fc5a5b03dfdd95b60f57628/t/5fd6d5c7267c8d0ace586c38/1607914952997/mitasasazexefa.pdf
    • https://static1.squarespace.com/static/5fc0e1448ef7301f8b1097bc/t/5fc1651118e72e5fdb0be3af/1606509842815/fatulolulo.pdf
    • https://static1.squarespace.com/static/5fbce344be7cfc36344e8aaf/t/5fbdf22f145a8629dc75be4d/1606283824392/12332023873.pdf
    • https://uploads.strikinglycdn.com/files/013cfd54-18d9-4851-8b42-cd6c688fc4be/nopinowajuwurulega.pdf
    • https://static1.squarespace.com/static/5fbce344be7cfc36344e8aaf/t/5fbf52a44e98326c020756b4/1606374055200/kitchenaid_dryer_service_manual.pdf
    • https://uploads.strikinglycdn.com/files/ddff73e7-436d-49a9-8112-bbfa52cf6a8e/fojeziwaxajetikali.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000fda0.bin
6f1bc4a1fa59de858929bf8f0bde3ca32ac97e222b0aeb3a75371597b556c51f		 pdf-font-stream PDF embedded font (sfnt) at offset 0xFDA0 5020 bytes
font_01_sfnt_off00010e6e.bin
aeaa000c12cafac0a73e91aadcd39f57b8b42e8a99d636a29d992d8add2399a7		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10E6E 10824 bytes
font_02_sfnt_off0001333b.bin
4fcfa7c68d76e23b667942a3ac892d2d5d88346478daafc61479ad4df4af3dd3		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1333B 4324 bytes

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