Malicious PDF — malware analysis report

Static analysis result for SHA-256 7419034e1d7f0fce…

MALICIOUS

PDF

68.3 KB Created: 2020-11-26 00:05:04 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-26
MD5: 16be6c831158a52090408f81a51cdb13 SHA-1: d4962aaf756289114b2042ca4e6607fc9d9438ee SHA-256: 7419034e1d7f0fce6ae014ce625aeaf45a6b2e9c7a895f44d05c357471e5b41f
156 Risk Score

Malware Insights

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

The PDF contains numerous external links, with a critical heuristic identifying it as a PDF link farm. One of the primary external URLs, 'https://trafffe.ru/strik?utm_term=backcountry+camping+in+honolulu', is suspicious and likely leads to a phishing or malware distribution site. The ML classifier and ClamAV detection strongly indicate malicious intent, suggesting the document is designed to redirect users to malicious content.

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://trafffe.ru/strik?utm_term=backcountry+camping+in+honolulu PDF link annotation
    • https://vozapevozatoka.weebly.com/uploads/1/3/4/0/134097066/sikolekino-ropunewilej-fodojigaset.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4416656/normal_5f979f3ff300b.pdfIn PDF document text
    • https://giwonogudere.weebly.com/uploads/1/3/4/8/134872327/6312045.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4446399/normal_5fb9656882a33.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4454562/normal_5fa4933e715f7.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/8bc145fc-16bd-4169-9cac-5811899b261d/20x24x30_plyo_box_plans.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/be914c97-db08-4e9e-81d7-271f5aa0ac7d/technologie_6C3A8me_C3A9nergie_evaluation.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/20b4c05a-d5d9-4de7-90ac-7f4fd07ccdd8/33750951699.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/fabb3277-88de-4c13-a8af-ec25d7859144/werifozefudubafiwa.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ba97074c-1691-4872-891b-b986c2a92e6e/opcl3_lewis_structure.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4c52d185-1a2f-447b-87fb-dc7b97f8adc8/lexakudakafakurapapebaru.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_off0000cd61.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCD61 5384 bytes
SHA-256: 5d47f40a4c3b5b3b651e4f4a88c6b92e977d1c769c237c39c9734654723ab882
font_01_sfnt_off0000df96.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDF96 10932 bytes
SHA-256: 06131ae969995b5bfcb93b247cda8e11f12e92f2bfed3f412f4aa0cab7009758

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