Malicious PDF — malware analysis report

Static analysis result for SHA-256 e568cbc29154915b…

MALICIOUS

PDF

71.3 KB Created: 2020-11-13 15:39:06 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-12
MD5: 1a175276b69ba3b717c3e279428e5073 SHA-1: 1c6971eda339729aafe2c95f8af6d8b7959ae93b SHA-256: e568cbc29154915b0e0b1329be00fb450043f4de5385c5e9d523fbd7e717a3af
156 Risk Score

Malware Insights

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

The PDF contains a large number of external links, with one heuristic specifically identifying a 'PDF link farm'. The presence of the URL 'https://trafftec.ru/123?utm_term=7th+heaven+ruthie+and+martin+kiss' and the ClamAV detection 'Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0' strongly suggest a phishing or malicious redirection attempt. Although no scripts were explicitly extracted, the nature of the link farm and the ML classification indicate malicious intent, likely related to spearphishing.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://trafftec.ru/123?utm_term=7th+heaven+ruthie+and+martin+kiss PDF link annotation
    • https://xevivipemasap.weebly.com/uploads/1/3/4/4/134481894/negolupixi.pdfIn PDF document text
    • https://fobolobal.weebly.com/uploads/1/3/4/3/134317950/wasur_bazelumexojuwa.pdfIn PDF document text
    • https://mubuwejazanewa.weebly.com/uploads/1/3/4/5/134585617/c73c33c.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://s3.amazonaws.com/kakef/astronomy_and_cosmology.pdfIn PDF document text
    • https://s3.amazonaws.com/sodoxi/oil_trading_manual.pdfIn PDF document text
    • https://s3.amazonaws.com/wazagidonux/lulizifanelititufeb.pdfIn PDF document text
    • https://s3.amazonaws.com/kulinisokakewi/65375939388.pdfIn PDF document text
    • https://s3.amazonaws.com/rebesudanolo/girlfriends_guide_to_divorce_cast_season_4.pdfIn PDF document text
    • https://s3.amazonaws.com/kepevipawit/the_sniper_short_story_theme.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/dc209a5c-3179-4825-b421-77301a4cf75d/lulisazojemubijoj.pdfIn PDF document text
    • https://s3.amazonaws.com/fowikorejodi/tudekatuto.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f29f3490-34a9-4ef5-a38c-660a8972d7e7/medical_terminology_a_short_course_7th_edition.pdfIn PDF document text
    • https://s3.amazonaws.com/zepifudoxapo/zixozagilifepojaruraza.pdfIn PDF document text
    • https://s3.amazonaws.com/xenavuxa/newebegus.pdfIn PDF document text
    • https://s3.amazonaws.com/kevava/cerise_hood_info.pdfIn PDF document text
    • https://s3.amazonaws.com/bunobu/49713538889.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000cc80.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCC80 4916 bytes
SHA-256: 5fa1667ef1ebb8e33679abe8cfb1ac60c11c78499f5bf86779ae60fed331a8a9
font_01_sfnt_off0000dcff.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDCFF 10928 bytes
SHA-256: 262170e95bc34c629dd70a105343ef6dd4ee281f91256ae456d261b068600bda
font_02_sfnt_off0001023c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1023C 4324 bytes
SHA-256: 4fcfa7c68d76e23b667942a3ac892d2d5d88346478daafc61479ad4df4af3dd3

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