Malicious PDF — malware analysis report

Static analysis result for SHA-256 6921f18f7f0084ad…

MALICIOUS

PDF

68.2 KB Created: 2020-12-17 21:47:10 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-17
MD5: fbfe5c700ec3704c7b7838e3d33f0ca4 SHA-1: db20e33d0ae1a04490af5b898447fd8a16e25f93 SHA-256: 6921f18f7f0084ad0301b5ea78af426582438a1c75fb3de47bdf349824454ac1
156 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF was flagged as malicious by multiple heuristics and a machine learning classifier, with ClamAV identifying it as a phishing trojan. The PDF contains numerous external links, including a suspicious URL hosted on 'trafffe.ru', suggesting a phishing or redirection attempt. While no scripts were explicitly extracted, the PDF structure and the presence of external links indicate it's designed to lead the user to a malicious site.

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://trafffe.ru/strik?utm_term=prodigal+son+john+patrick+shanley+script+pdf PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4371812/normal_5f966bcee2771.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4383567/normal_5fb7bfe7db616.pdfIn PDF document text
    • https://tubonizuruzoxuk.weebly.com/uploads/1/3/0/9/130969435/f5a5e969f1078.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4402933/normal_5f91cb784bf9e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4373788/normal_5f96f6d1dc73b.pdfIn PDF document text
    • https://tamagokevalagir.weebly.com/uploads/1/3/0/7/130776783/764822898.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/bovenotojitowe/tusikibuvok.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4908c101-4717-4de9-882f-e1bad4fbcc49/86727685294.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/52c4841e-513f-4990-a6ea-4d39cf8ac619/61419630275.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ac5ec685-ea77-4f67-a6a2-6a1e228e41e5/toshiba_tv_owners_manual.pdfIn PDF document text
    • https://s3.amazonaws.com/piradi/bajrangbali_audio_songs_telugu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a74566de-ecb0-4ca8-8bea-742021ba0c48/vijayadashami_2020_date.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/96ba2244-9dfe-4e1d-967d-13d048670fdd/ac_moore_floating_frames.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/34f39b97-183a-43b9-908a-437f976cd3f3/96042256474.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

Related samples 7

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000cc3c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCC3C 5660 bytes
SHA-256: 0ade874be014a0f1fd51259a270431835e97736052e5d7ef5826ce1f48d74d36
font_01_sfnt_off0000df8c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDF8C 10580 bytes
SHA-256: 6a7bd202b6c8c0b48866821c2fddf9b07c44e0aa47399cd4f15fe251c225d157

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