Malicious PDF — malware analysis report

Static analysis result for SHA-256 f12bb7b46ffc60b0…

MALICIOUS

PDF

61.1 KB Created: 2020-11-27 00:45:12 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-05
MD5: b0d7ab3ba8e9d643dfb6a23e4510b833 SHA-1: b08ce29be32dbbaa5aafe910518bc743f755e5a5 SHA-256: f12bb7b46ffc60b0729694155321e365c9555aee3e926de173db2a4e3f476de0
156 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF contains a significant number of external links, identified as a PDF SEO link farm, directing users to various PDF documents. One of the primary external URIs, 'https://traffking.ru/strik?utm_term=down+bridge+lamp+shades', is flagged as suspicious. The ClamAV detection and ML classifier strongly indicate malicious intent, likely related to phishing or malware distribution through these linked resources.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

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/strik?utm_term=down+bridge+lamp+shades PDF link annotation
    • https://naxulukituno.weebly.com/uploads/1/3/4/8/134879135/xibowanavo.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4473035/normal_5fb95198908ff.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4419437/normal_5fa3626f6a600.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4388283/normal_5f9d1fefb96bb.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4421472/normal_5f9a2ce87b02f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4385020/normal_5fab7ec9c519d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4414159/normal_5fb2f977cef4a.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/gujutavevive/35371729310.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/97082e3a-95fd-4721-bec9-0fe86c08bcfa/nintendo_3ds_capture_card_2020.pdfIn PDF document text
    • https://s3.amazonaws.com/wepeliniru/osha_psm_standard_appendix_a.pdfIn PDF document text
    • https://s3.amazonaws.com/leguvefu/cae_practice_tests_plus_1.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_off0000b306.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB306 5604 bytes
SHA-256: e1e6e9ad812ab3626e3fd9b27176f133d4e7863934c3a44e84ae78a03a602a3b
font_01_sfnt_off0000c5f2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC5F2 9912 bytes
SHA-256: e7252f06996e97372b9066588d07600a6f1f282a882fa06cf45d81f20ae84af6

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