Malicious PDF — malware analysis report

Static analysis result for SHA-256 d2e096967e022d2c…

MALICIOUS

PDF

70.0 KB Created: 2021-02-07 20:45:56 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: 0e6e4fbeccc174c6e5b095278963ff89 SHA-1: 8e7f9689772fbeedd855abacf1839a6242d50adf SHA-256: d2e096967e022d2c952fc81cf20a70f2cc52306352df7afc6c151e3b543a40a5
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 as a link farm, with the primary malicious URL being 'https://baarspo.ru/123?utm_term=game+of+thrones+robb+stark+battle'. ClamAV and ML classifiers also flagged this PDF as malicious, specifically as a phishing trojan. The document body, though heavily obfuscated, contains references to 'wkhtmltopdf' and 'Qt', suggesting it was generated programmatically, likely to disguise its malicious intent.

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://baarspo.ru/123?utm_term=game+of+thrones+robb+stark+battle PDF link annotation
    • https://cdn.sqhk.co/kapokosop/uljiTjj/era_origin_gameplay.pdfIn PDF document text
    • https://wadoruzog.weebly.com/uploads/1/3/1/3/131379034/namega_vavogunetabapu.pdfIn PDF document text
    • https://cdn.sqhk.co/nizolurinidi/ijjajjP/tadoderanekevajox.pdfIn PDF document text
    • https://cdn.sqhk.co/vagizabibo/jihagfq/garden_wars_2.pdfIn PDF document text
    • https://jetapixivokob.weebly.com/uploads/1/3/4/7/134726526/760badb3c69e24e.pdfIn PDF document text
    • https://bugomalaked.weebly.com/uploads/1/3/5/3/135324661/pinivajafiri.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://demuremapinob.epizy.com/belaseshe_full_movie_mp4_free.pdfIn PDF document text
    • https://s3.amazonaws.com/jupevuxirapi/go_kart_build_guide.pdfIn PDF document text
    • https://s3.amazonaws.com/befarekogol/81760527692.pdfIn PDF document text
    • https://s3.amazonaws.com/nawuvud/amplifiers_file.pdfIn PDF document text
    • https://s3.amazonaws.com/leributafa/google_form_pull_data_from_google_sheet.pdfIn PDF document text
    • https://s3.amazonaws.com/tosevud/57925803512.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d64c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD64C 5240 bytes
SHA-256: 1e410f25af467623d01e7e7d99a8e856f72bf23e73ce737ca22ff90e62b252e7
font_01_sfnt_off0000e7f8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE7F8 10388 bytes
SHA-256: af2afb11b39ea10bae9a7cc10bd82c327b2c7ff06e674037b91c7c6d29e82c85

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