Malicious PDF — malware analysis report

Static analysis result for SHA-256 0701545198b3b539…

MALICIOUS

PDF

72.8 KB Created: 2020-12-30 05:49:04 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-31
MD5: 63a7ae2496c0b9aec4e4818fba8cb058 SHA-1: 1d23010002560b6507123f2a07525040597be88a SHA-256: 0701545198b3b539b8f04b74f70ad2b5a426527b0d90145ebb96350277bce780
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 link farm. One prominent external URI, 'https://traffset.ru/123?utm_term=a+long+way+gone+essay+thesis', is suspicious. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or malware delivery via these links.

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://traffset.ru/123?utm_term=a+long+way+gone+essay+thesis PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4368964/normal_5f8b0556448d9.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366405/normal_5f8c857457e7a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368506/normal_5f96186c6bd9b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4384459/normal_5f911d369da84.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4410216/normal_5fa8e6678ede1.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4418000/normal_5fc18906e0f90.pdfIn PDF document text
    • https://nixejinalir.weebly.com/uploads/1/3/4/3/134321479/dikul.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4383923/normal_5fa8bfd9ee71e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4497109/normal_5fb9a162795bc.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4393904/normal_5fc06e9a9a536.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/b7638d6e-7ef6-4c70-94d5-c30ae20c6136/bogojoxumagenuki.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/bba2b1f3-3e08-4ae1-89bb-c11b7001bab9/rogue_galaxy_trophy_guide.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_off0000e0b7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE0B7 5032 bytes
SHA-256: 10b222b34bf58179f1018be2710624c2b89e3e68029e1cf34c49945f4a68f340
font_01_sfnt_off0000f1ee.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF1EE 10708 bytes
SHA-256: b26941b0684971aa01e86550e18d01e17c001f0e5d2c6a4d79982aa1d74f5607

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