Malicious PDF — malware analysis report

Static analysis result for SHA-256 36a64233bda0ada0…

MALICIOUS

PDF

71.5 KB Created: 2021-01-13 00:07:37 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-27
MD5: 014ee927d7516775783809b472ecbef4 SHA-1: e766fb5909908b864a171345267ebd57a5e82d81 SHA-256: 36a64233bda0ada054267d9b60ee0fae50f53dbd77c8e8d56eed7b41a2558ff0
214 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, with one pointing to a known malicious redirector. This suggests a phishing or SEO manipulation campaign. The ClamAV detection and ML classifier further support its malicious nature. No scripts were extracted, but the embedded links are the primary indicators of malicious activity.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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.
  • 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://gettraff.ru/123?utm_term=sugar+hill+1993+trailer In PDF document text
    • https://mubuwejazanewa.weebly.com/uploads/1/3/4/5/134585617/3968381.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4410415/normal_5fe890ac1108b.pdfIn PDF document text
    • https://cdn.sqhk.co/mojobugoge/hjij6VK/juventus_old_logo_dls.pdfIn PDF document text
    • https://cdn.sqhk.co/farukisinu/ghcgchg/freddy_vs_jason_soundboard.pdfIn PDF document text
    • https://dusexitope.weebly.com/uploads/1/3/4/6/134646398/baziziroguvog-teronekox-lifuxi-najaloka.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4494674/normal_5ffca720c7ca1.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4383704/normal_5f91ef5d64641.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4376621/normal_5fe87861dac57.pdfIn PDF document text
    • https://veraroligesabo.weebly.com/uploads/1/3/4/3/134377370/litel.pdfIn PDF document text
    • https://zabaparadasikid.weebly.com/uploads/1/3/4/3/134317604/2566761.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4372735/normal_5fa8d6ebdedbe.pdfIn PDF document text
    • https://cdn.sqhk.co/dosakupu/dbWxYgg/stream_nfl_games_live_free_online_batman.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/falevi/kdoqi_guidelines_parathyroidectomy.pdfIn PDF document text
    • https://s3.amazonaws.com/xufujofaleki/chernobyl_hbo_1080p.pdfIn PDF document text
    • https://s3.amazonaws.com/mokuwanibof/genetics_worksheet_practice_transcription_and_translation.pdfIn PDF document text
    • https://s3.amazonaws.com/kuxuxemu/74684576958.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_off0000d714.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD714 5244 bytes
SHA-256: 7de8a5118594076df2de5a7ccf3fdbbf363ead9d6b20502803705a59be1894d7
font_01_sfnt_off0000e8f3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE8F3 11920 bytes
SHA-256: 91eba537ff42c42e59fce63da0c574cb260b61968a531f6c0c6a8fa661d87535

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