Malicious PDF — malware analysis report

Static analysis result for SHA-256 0ed09ea7b3f5dc69…

MALICIOUS

PDF

70.6 KB Created: 2021-01-08 19:08:57 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-03
MD5: 197c2a8a2c361f9838fb5236ffd097d3 SHA-1: 7df4b8aa083074a5eb00586c59f3d8c647ff8a0b SHA-256: 0ed09ea7b3f5dc6916910bc302493db3dfc81cf4d1166c1b6de4bc656e984993
156 Risk Score

Malware Insights

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

The PDF contains a large number of external links, identified by the PDF_SEO_LINK_FARM heuristic, suggesting a link farm or phishing attempt. The ClamAV detection and ML classifier further indicate malicious intent. While no scripts were explicitly extracted, the presence of numerous external links implies an attempt to redirect the user to potentially malicious websites, possibly for credential harvesting or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 5

  • 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
  • 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/aws?utm_term=disability+mainstreaming+guidelines PDF link annotation
    • https://cdn.sqhk.co/lewulula/ffibotU/miladevolaruburilasalox.pdfIn PDF document text
    • https://cdn.sqhk.co/gaxokakijefe/bigLhgw/shur_line_paint_brush.pdfIn PDF document text
    • https://leletusisiku.weebly.com/uploads/1/3/4/3/134363421/9105479.pdfIn PDF document text
    • https://goduvozimaku.weebly.com/uploads/1/3/1/3/131380582/revewupejubowarem.pdfIn PDF document text
    • https://wosabizovores.weebly.com/uploads/1/3/4/5/134577485/3757896.pdfIn PDF document text
    • https://cdn.sqhk.co/lopumilekana/1heBiaA/korean_pop_music_videos.pdfIn PDF document text
    • https://cdn.sqhk.co/nawafoxobok/ZulhglZ/full_screen_timer_app_ipad.pdfIn PDF document text
    • https://cdn.sqhk.co/xufaribo/P5JhjTy/naliwapa.pdfIn PDF document text
    • https://vumusubivabup.weebly.com/uploads/1/3/4/4/134491869/8e1a85383f.pdfIn PDF document text
    • https://cdn.sqhk.co/vaxikinanibu/iDJgehh/bexogen.pdfIn PDF document text
    • https://cdn.sqhk.co/babijuvawov/UjgMDgc/monument_valley_game_wallpaper.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn 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_off0000d8c8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD8C8 5384 bytes
SHA-256: 6aae720714d34e1567c40a8a366f9a125971176f97afe7ecb140f8cdac7fc757
font_01_sfnt_off0000eb0c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEB0C 10228 bytes
SHA-256: fc0e527b3904634ea6009bab9fe84b13da2fade8248b2c16b66a981adffb0d82

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