Malicious PDF — malware analysis report

Static analysis result for SHA-256 3aecf0f00ff226bd…

MALICIOUS

PDF

66.5 KB Created: 2020-11-17 07:13:57 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-02
MD5: 444c77b4d4911e92702d1ab8fa05d62a SHA-1: 9e0476e073ac2881c43164647d66ac6b54def076 SHA-256: 3aecf0f00ff226bd680d6e9a8d8070b1c3855c2b02d1dd0534a18c6f912fe513
186 Risk Score

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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.
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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://trafftec.ru/strik?utm_term=minecraft+naruto+mod PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4369491/normal_5f8efbe4b119b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4370987/normal_5f893cab1b4fa.pdfIn PDF document text
    • https://jalipixax.weebly.com/uploads/1/3/4/3/134340191/xezegilu.pdfIn PDF document text
    • https://nonefipuxope.weebly.com/uploads/1/3/4/4/134493331/0bffa.pdfIn PDF document text
    • https://vufepuxo.weebly.com/uploads/1/3/4/5/134522835/renigutilenigomas.pdfIn PDF document text
    • https://jubunukaf.weebly.com/uploads/1/3/1/4/131483214/c44d0ce9000.pdfIn PDF document text
    • https://xavagozewurele.weebly.com/uploads/1/3/4/5/134583143/nogevomo_volepotigiw.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/tudawufed/witch_doctor_song_lyrics.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2932ccda-f57f-4f2a-90ec-b8ffe47f8597/taronejapafadagaxuper.pdfIn PDF document text
    • https://s3.amazonaws.com/jumedemimo/barapitazakusimin.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c2038f48-9492-4013-bffc-c555ad56d92f/fibejezivep.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_off0000cbf3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCBF3 4964 bytes
SHA-256: 34def72371f825d76f72ddbbc13ef1f9f038e18ede8fe2711d859a19c8df9813
font_01_sfnt_off0000dcce.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDCCE 9704 bytes
SHA-256: 468425b084448d628f91d6f819d598190b094fad8f72e99bed0dfd81c911818c