Malicious PDF — malware analysis report

Static analysis result for SHA-256 b102b5a647cb4ece…

MALICIOUS

PDF

64.7 KB Created: 2020-11-24 02:16:07 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-27
MD5: 071d59ed8623af138cb6306468b28a7a SHA-1: 16404d76023f388056c38e938fbbc3d566be63b8 SHA-256: b102b5a647cb4ecee533c8f55f4b389d146afabcd17054f359034f3a498e4e41
156 Risk Score

Malware Insights

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

The PDF file contains numerous external links, with a critical heuristic identifying it as a link farm. The primary URL, 'https://traffnew.ru/strik?utm_term=anthologie+de+l%2527humour+noir', suggests a lure related to humor, while another linked PDF from 'beluloxepivizor.weebly.com' is also flagged. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or SEO abuse.

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://traffnew.ru/strik?utm_term=anthologie+de+l%2527humour+noir PDF link annotation
    • https://beluloxepivizor.weebly.com/uploads/1/3/4/1/134131295/061da88a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366389/normal_5f99b7fb29668.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368751/normal_5f8e2259759f3.pdfIn PDF document text
    • https://wudivaju.weebly.com/uploads/1/3/4/7/134762352/2423500.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4449629/normal_5fbaf966e14e2.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4401697/normal_5f9ccb955a176.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/73d52aae-464d-4abd-b023-a3ca65f445e0/49479162290.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/80506bff-a4ca-466e-bc86-cbce76bea3be/ponutisixexidejar.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c0c2afc6-29e2-4c69-a404-f599584737fc/jamirulusa.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8c6b29ab-74ff-4a39-820e-6a64a9629f15/13943535019.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/cd732594-7ee8-4069-a748-72319e5569c3/silena_beauregard_last_words.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_off0000bd0b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBD0B 4872 bytes
SHA-256: 1f77554487c1e6b93f6b4aa2a9925995b674ef6443fd8ef08bce9100eef38ae2
font_01_sfnt_off0000cd75.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCD75 12352 bytes
SHA-256: 183944737b7c36726f7cf13be1ee229affe31c1c79d86df9f8382ee8dd96876b

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