Malicious PDF — malware analysis report

Static analysis result for SHA-256 d6c1f89fa50cba59…

MALICIOUS

PDF

69.0 KB Created: 2020-11-23 19:46:20 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-05
MD5: 46555f2eabc59aa47a255651fe6f809c SHA-1: 229b7ae80c22f56582269d4ebaa37147bbc76474 SHA-256: d6c1f89fa50cba59a60c430cde2e1fd393e73c811af150c4272441c7d192f127
156 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF file was detected as malicious by multiple heuristics and a machine learning classifier, indicating a phishing or trojan attempt. It contains a large number of external links, suggesting a link farm designed to direct users to potentially harmful content, such as the URL `https://trafficel.ru/strik?utm_term=fnaf+sl+download+pc`. The document body is heavily obfuscated, preventing a clear understanding of its specific lure, but the overall structure and link farm behavior point to a malicious intent.

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/strik?utm_term=fnaf+sl+download+pc PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4386605/normal_5f9045000280d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365600/normal_5fa6959ebf49c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367650/normal_5f8c00b9ae6e0.pdfIn PDF document text
    • https://siwizapetodid.weebly.com/uploads/1/3/4/0/134041585/944736.pdfIn PDF document text
    • https://wojegapemepuwa.weebly.com/uploads/1/3/4/0/134096127/jubajutaduwugina.pdfIn PDF document text
    • https://wunimebi.weebly.com/uploads/1/3/4/3/134361225/1896713.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4386828/normal_5f99e175867cb.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368977/normal_5fa2cc6549c02.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4389586/normal_5f90e04ae6b49.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4402294/normal_5fb364060b507.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4383460/normal_5fb91c1ba7952.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/08ec5c63-ff95-4342-b971-a2c9090c0da2/simple_sigil_magic.pdfIn PDF document text
    • https://s3.amazonaws.com/xafaxotaful/circulatory_system_worksheet_answers.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2a4abd9c-b66f-4918-9c0c-6c2c790093ea/guide_to_sewing_machine_feet.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_off0000d246.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD246 5100 bytes
SHA-256: b4485da6f8c572a11e584bad80b5267a884ec57b02540c4694c6e4bb6fb97637
font_01_sfnt_off0000e3d4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE3D4 10464 bytes
SHA-256: 560efd7400d5a225ca4c25d86e1ef1b1e6ac66c25512cc605078fd7590f3f1d5

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