Malicious PDF — malware analysis report

Static analysis result for SHA-256 4c1da3b2dfde6161…

MALICIOUS

PDF

69.5 KB Created: 2020-11-13 16:42:04 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-05
MD5: caf5f0040aad21a7551ae917f121baee SHA-1: bd35610df603fccd5b18c728c941cdf3f087081d SHA-256: 4c1da3b2dfde6161762dee4a86bf1b6b3be8d28eae749b55568ff270e5f98cd8
156 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF file was flagged by multiple heuristics, including PDF_SEO_LINK_FARM and ML_NYX_PDF_MALICIOUS, indicating a high likelihood of malicious intent. The presence of numerous external links, with one pointing to 'traffking.ru', suggests a phishing or malicious redirection attempt. ClamAV also detected it as Pdf.Phishing.Trojan.

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://traffking.ru/123?utm_term=even+when+you+lie+to+me+movie PDF link annotation
    • https://wetejitaxazis.weebly.com/uploads/1/3/4/3/134306742/fibagujozemut.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366397/normal_5f89ed8c144a2.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366957/normal_5f91f74d8788d.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/ec6d8f7a-38fa-49a0-a8a4-6c5bac102aa2/47627596745.pdfIn PDF document text
    • https://s3.amazonaws.com/vibove/61383386497.pdfIn PDF document text
    • https://s3.amazonaws.com/doxifuba/ucsd_cse_210.pdfIn PDF document text
    • https://s3.amazonaws.com/zurovajij/exit_42_band_colorado.pdfIn PDF document text
    • https://s3.amazonaws.com/baxegezivumi/free_smite_promo_codes.pdfIn PDF document text
    • https://s3.amazonaws.com/zetare/8776037078.pdfIn PDF document text
    • https://s3.amazonaws.com/henghuili-files2/antagonista_definicion.pdfIn PDF document text
    • https://s3.amazonaws.com/kavitokolezub/badger_5_manual.pdfIn PDF document text
    • https://s3.amazonaws.com/sinadi/42497805668.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b6771847-ab53-4569-9439-241e59022b7c/bomuvamotojagonezimakamag.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_off0000d7b1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD7B1 4652 bytes
SHA-256: 8eebc6b2ec670fbe00c5a582e2ce89377aa65973c40e9e97329c0b128bba2781
font_01_sfnt_off0000e77b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE77B 9960 bytes
SHA-256: 16d08a841a32bbd6f3e02de5ec5279a581c646430f349787985cbe953ea2fbca

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