Malicious PDF — malware analysis report

Static analysis result for SHA-256 b69d1fa17a26cc62…

MALICIOUS

PDF

77.7 KB Created: 2020-11-17 22:45:06 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-07
MD5: 60fa7c49756d3be78483400b1788ff3d SHA-1: 4a7b7b7ab242dd1f2a50821dba0f99eecb78e1ba SHA-256: b69d1fa17a26cc62b05989981b467bfea8b7c1bdc84aadb12c18e74d5027e1aa
156 Risk Score

Malware Insights

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

The PDF file contains numerous external links, a common tactic for phishing or distributing further malware. The heuristic 'PDF_SEO_LINK_FARM' indicates a large number of external links, with one pointing to 'https://traffset.ru/123?utm_term=stapleseasyrebates.com%252Frebate+card+balance', suggesting a lure related to rebate card balances. ClamAV detection as 'Pdf.Phishing.Trojan' further supports a malicious classification. No scripts were extracted, but the overall structure and URL distribution point towards a phishing or malware delivery attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 5

  • 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.
  • 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://traffset.ru/123?utm_term=stapleseasyrebates.com%252Frebate+card+balance PDF link annotation
    • https://xexegetogud.weebly.com/uploads/1/3/4/3/134375989/b6705.pdfIn PDF document text
    • https://sorawujij.weebly.com/uploads/1/3/4/6/134671526/38cafd3ae61.pdfIn PDF document text
    • https://zomomawiwupid.weebly.com/uploads/1/3/4/3/134385308/1785413.pdfIn PDF document text
    • https://kuxilididid.weebly.com/uploads/1/3/4/3/134387830/kodufe.pdfIn PDF document text
    • https://lipowuripipu.weebly.com/uploads/1/3/1/3/131378852/dbf724c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4414159/normal_5fa01988e9234.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4413121/normal_5f96c19a1bf53.pdfIn PDF document text
    • https://tazejoga.weebly.com/uploads/1/3/1/3/131383942/pogibatajote_rosirorotow.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/gewisetug/10440745651.pdfIn PDF document text
    • https://s3.amazonaws.com/temujonuwu/decimal_to_binary_worksheet.pdfIn PDF document text
    • https://s3.amazonaws.com/xajowu/children_s_paper_crown_template.pdfIn PDF document text
    • https://s3.amazonaws.com/vososasoxumete/britney_spears_conservatorship_wiki.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d893.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD893 5632 bytes
SHA-256: e3d86f70966364cb6d88eeaf6d867c7e7633c4f78e0e068ad41950b7f7901209
font_01_sfnt_off0000ebaf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEBAF 11832 bytes
SHA-256: 639996854b25b9de5f8d74549842cd605c121117a090a7e8b8cfdf9286f6618e
font_02_sfnt_off00011391.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11391 16376 bytes
SHA-256: 684a3c196e802b4dc45ee85e0d12f41c83d6b6c6a55a83cec5fb8e332ee9aa36

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