Malicious PDF — malware analysis report

Static analysis result for SHA-256 e0d2be2965c7c044…

MALICIOUS

PDF

63.5 KB Created: 2021-02-27 07:55:43 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-04
MD5: 000e93a4d465a7ee218e1a064f7fcb5c SHA-1: 1640209699be00504d55241e4485c0242caa7932 SHA-256: e0d2be2965c7c0449a83e9ffd3bd69aa61a2913a46f6c800a02f0818fb620324
126 Risk Score

Malware Insights

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

The PDF file contains numerous external links, many of which point to disposable domains and are designed as a link farm, suggesting a phishing or malware distribution attempt. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or trojan delivery. Although no scripts were extracted, the PDF structure and embedded URLs are indicative of a malicious document designed to trick users into downloading further malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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 is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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://seumenha.ru/aws?utm_term=first+aid+cpr+book+free+download PDF link annotation
    • https://cdn.sqhk.co/nedabuke/3rhdghK/rovapixuki.pdfIn PDF document text
    • http://getallcreditscores.info/what_to_name_a_dog_walking_businesss4och.pdfIn PDF document text
    • http://fastgetme.online/how_to_edit_a_picture_to_have_a_transparent_background_in_paint2kadh.pdfIn PDF document text
    • http://creampiepow.club/fujekubawcts9o.pdfIn PDF document text
    • http://mavito.online/opera_mini_web_browser_cepat_apkpure8kmpf.pdfIn PDF document text
    • https://cdn.sqhk.co/rotexopapi/PgdgrUY/shareit_mod_apk_without_ads.pdfIn PDF document text
    • https://cdn.sqhk.co/tuminageka/Ihiidhg/moto_camera_apk_app.pdfIn PDF document text
    • https://cdn.sqhk.co/zepipawetopi/9hdwUhd/better_settlers_horizon.pdfIn PDF document text
    • https://cdn.sqhk.co/dofewijoras/ijPXrGI/48818734732.pdfIn PDF document text
    • https://cdn.sqhk.co/totimujid/Fidgfia/crash_team_racing.pdfIn PDF document text
    • https://cdn.sqhk.co/xaranoraf/Ys6ghhi/alone_quotes_in_english_for_girl_share_chat.pdfIn PDF document text
    • https://cdn.sqhk.co/sabiwizi/EIlhbib/31646726488.pdfIn PDF document text
    • http://mnogolidov.xyz/tableau_de_karnaugh_coursq2xq3.pdfIn PDF document text
    • http://teenagetutor.online/11964038692fyr9m.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/rolefosiju/balancing_chemical_equations_with_fractions_worksheet.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_off0000be5b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBE5B 5400 bytes
SHA-256: ce32798b4358f5575987d2d155a327541a36439f608725ad5fe4e1c6d89be871
font_01_sfnt_off0000d0dc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD0DC 9528 bytes
SHA-256: 9bbc23e60cdd0b981b00733540b9a9720ecff20f28b2831c682951a20b0f3a66

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