Malicious PDF — malware analysis report

Static analysis result for SHA-256 6e48fceabba3fe00…

MALICIOUS

PDF

78.4 KB Created: 2021-01-01 20:42:15 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-27
MD5: bbc149d9ba439cd8d5d96f4b2e15fea2 SHA-1: 702dd7834da05fb8fbbf55f07110518dd102e34d SHA-256: 6e48fceabba3fe0051843243adbd2b6fded0f0c4b95fa586af99508aaac1f78f
156 Risk Score

Malware Insights

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

The PDF file contains a significant number of external links, identified as a 'PDF link farm'. The primary URL, 'https://traffnew.ru/strik?utm_term=just+dance+unlimited+kung+fu+fighting', and another linked PDF from 'weebly.com' are suspicious. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or malware distribution.

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://traffnew.ru/strik?utm_term=just+dance+unlimited+kung+fu+fighting PDF link annotation
    • https://rudofodirofebas.weebly.com/uploads/1/3/0/7/130739781/rosan_vepobojitopagip.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4490953/normal_5fba3acb8a85c.pdfIn PDF document text
    • https://federadedeladol.weebly.com/uploads/1/3/4/6/134626130/c1a32005ee.pdfIn PDF document text
    • https://cdn.sqhk.co/tuledapozato/ojgT9Lf/88801361860.pdfIn PDF document text
    • https://cdn.sqhk.co/xubulozirod/ziaibje/crashing_season_2_episode_8_cast.pdfIn PDF document text
    • https://jatorogerujew.weebly.com/uploads/1/3/2/7/132710569/1302795.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/jolunenafobuw/62810984690.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1ada1967-8eea-447c-9edf-8a687d0779a8/fomikavexewame.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1f039422-11ab-4762-99de-d89f1cb7dc96/mesepetowapo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4fe1d318-4b3b-4a95-b07c-e90817287f55/nutebedosixijaviroru.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7e73529a-d55c-438f-ac00-bfb4af370bab/physical_properties_of_stars_worksheet.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/62bdee8c-3a94-462a-91c7-89fe61b9f538/sinukoviluvudekariz.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0a421b5a-6c82-4e1a-97e8-75b193786839/44218254147.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_off0000e13e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE13E 5392 bytes
SHA-256: 315f5a73227eca9a5f1f65b0e65e048f5f983468e8695cdc553413f3dc172bc5
font_01_sfnt_off0000f377.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF377 10380 bytes
SHA-256: e6ffcbecc41fc0a511497c1dde00ba3639d3f2a3cd10004b1e722ad5041a055d
font_02_sfnt_off00011746.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11746 16092 bytes
SHA-256: e9fe716c2abc985b12a899a49d5539e4e8be1b56d50c083b30290d85a2a7c848

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