Malicious PDF — malware analysis report

Static analysis result for SHA-256 1e2f69a20aa5829a…

MALICIOUS

PDF

61.2 KB Created: 2020-11-13 16:47:11 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-26
MD5: d81bc9fc32d0d1668922f6c1ea138312 SHA-1: 357b1b65628557bcaebe9483787f4fab5933f4ae SHA-256: 1e2f69a20aa5829a928758bdf86829007dbac11b380bc118177461c98e9dd114
154 Risk Score

Malware Insights

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

The PDF file contains a large number of external links, many of which point to other PDF files, suggesting a link farm designed to manipulate search engine results or direct users to malicious content. One of the primary URLs, 'https://traffset.ru/strik?utm_term=geometry+unit+8+study+guide+answers', is likely part of a phishing or scam campaign. The presence of PDF-specific heuristics like 'PDF_SEO_LINK_FARM' and 'ML_NYX_PDF_MALICIOUS' further supports the malicious classification.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8484

Heuristics 4

  • 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
  • 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://traffset.ru/strik?utm_term=geometry+unit+8+study+guide+answers PDF link annotation
    • https://fojigexo.weebly.com/uploads/1/3/4/2/134235048/jaxinemuvawivarabiza.pdfIn PDF document text
    • https://vonubaxuted.weebly.com/uploads/1/3/1/4/131452839/vesefotim_toxopadolifipu.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4370059/normal_5fae1c79e63fc.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/degerutisig/dagobigeka.pdfIn PDF document text
    • https://s3.amazonaws.com/pusumowi/xutapaluduluvuraguvevok.pdfIn PDF document text
    • https://s3.amazonaws.com/lorifawuvawot/c_must_declare_the_scalar_variable_sql_error.pdfIn PDF document text
    • https://s3.amazonaws.com/wokesabisevo/garmin_gps_user_guide.pdfIn PDF document text
    • https://s3.amazonaws.com/gulapore/2735503324.pdfIn PDF document text
    • https://s3.amazonaws.com/sefepugolupalax/darksiders_3_trainer_free.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8f273e6a-24fe-45ff-ad31-958d0812c061/sbp_tv_download.pdfIn PDF document text
    • https://s3.amazonaws.com/lososimap/mopukojigatit.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9f1f4362-63d9-4bae-a4aa-37b88b5cb010/zuxexosulefujoke.pdfIn PDF document text
    • https://s3.amazonaws.com/liwafo/the_hunger_games_book_chapter_13_summary.pdfIn 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_off0000c610.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC610 5532 bytes
SHA-256: 5eab27d204af26c9e204b7b6e11423766cf67f6ab3bc5c2bfadc59f46894ba99
font_01_sfnt_off0000d8e4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD8E4 9852 bytes
SHA-256: ac0a9d4a4cd027d76aedc574fb4eb06dba03b98b45bd73659f452fbd0bc113b6

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