Malicious PDF — malware analysis report

Static analysis result for SHA-256 d135bf6a50bab3b8…

MALICIOUS

PDF

63.1 KB Created: 2021-01-14 01:13:20 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-10
MD5: d6d186633d354b4f9ed5e4e26f6fc4c8 SHA-1: 421b1351729b571bcc0939235b229228d084f315 SHA-256: d135bf6a50bab3b8ad862a7ae72eefe89d0bf1700533dd7c1d0b91aaa4b9df03
252 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 7

  • 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.
  • 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.
  • Fake invoice / payment lure low SE_INVOICE_LURE
    Document contains invoice or payment language paired with an action verb — useful context when combined with link, macro, or attachment indicators
  • 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://traffine.ru/wb?keyword=paypal%20account%20log%20in In PDF document text
    • https://cdn.sqhk.co/powirafawume/difS4RT/bowularekopa.pdfIn PDF document text
    • https://site-1173264.mozfiles.com/files/1173264/maxuvujowesejitoxuxivela.pdfIn PDF document text
    • https://cdn.sqhk.co/zofizitene/joOiaYw/tmnt_mutant_madness_mod_apk_1._25._1.pdfIn PDF document text
    • https://jizufozerujit.weebly.com/uploads/1/3/4/3/134343201/8cacf.pdfIn PDF document text
    • https://site-1201336.mozfiles.com/files/1201336/google_analytics_individual_qualification_exam_answers_quizlet.pdfIn PDF document text
    • https://site-1174029.mozfiles.com/files/1174029/huey_s_veggie_burger_calories.pdfIn PDF document text
    • https://cdn.sqhk.co/pimibopugugo/gdnWfJz/paul_hardcastle_song_19_lyrics.pdfIn PDF document text
    • https://xavabakonoliwif.weebly.com/uploads/1/3/4/4/134477423/tegupalinev.pdfIn PDF document text
    • https://cdn.sqhk.co/lojeliju/hhhiwgj/mageli.pdfIn PDF document text
    • https://mufedagejex.weebly.com/uploads/1/3/4/7/134726032/43a349bf4de6ea5.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4406820/normal_5fada1602e641.pdfIn PDF document text
    • https://site-1168290.mozfiles.com/files/1168290/fairy_jigsaw_puzzle_game_apk.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4386087/normal_5fabae8166382.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/suzitivasekoga/41340083334.pdfIn PDF document text
    • https://s3.amazonaws.com/jipowumat/wojovafexivewepimar.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_off0000bc93.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBC93 4932 bytes
SHA-256: c9b602ddf9fac52c98c6d350b8e1e5aa73f9938f68dc0552fe7a66eae92ad455
font_01_sfnt_off0000cd7d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCD7D 10096 bytes
SHA-256: cb9fb2e65206554c00f8960cc79e4bcd3149be89858638d6ffe54a5035a96e6e

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