Malicious PDF — malware analysis report

Static analysis result for SHA-256 174b4f8d1133b1e4…

MALICIOUS

PDF

83.1 KB Created: 2021-01-29 12:45:23 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: 13bd6e717417cd479f8136bf8bb48f47 SHA-1: d6bacba52396082ede3e55b08fc9feddc8268f76 SHA-256: 174b4f8d1133b1e471135d793e0909af72437de70018bd2f62b3c0361154df05
184 Risk Score

Malware Insights

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

This PDF file was identified as malicious by multiple heuristics and an ML classifier, specifically flagging it as a redirector to malicious infrastructure. The embedded links, such as 'https://cctraff.ru/wb?keyword=%D1%81%D0%BA%D0%B0%D1%87%D0%B0%D1%82%D1%8C%20%D0%B2%D0%B7%D0%BB%D0%BE%D0%BC%D0%B0%D0%BD%D0%BD%D1%83%D1%8E%20%D0%B8%D0%B3%D1%80%D1%83%20iron%20desert%20fire%20storm', are designed to lead users to potentially harmful websites. The document's structure and embedded links suggest a phishing or scam attempt, likely delivered as a spearphishing attachment.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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 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.
  • 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://cctraff.ru/wb?keyword=%D1%81%D0%BA%D0%B0%D1%87%D0%B0%D1%82%D1%8C%20%D0%B2%D0%B7%D0%BB%D0%BE%D0%BC%D0%B0%D0%BD%D0%BD%D1%83%D1%8E%20%D0%B8%D0%B3%D1%80%D1%83%20iron%20desert%20fire%20storm In PDF document text
    • http://newberginvestmentproperty.com/swipe_soccer_gamecewda.pdfIn PDF document text
    • http://xbet1.fun/90423482541jj3ty.pdfIn PDF document text
    • http://lg-supportteam.com/skylanders_characters_pricemyb1j.pdfIn PDF document text
    • https://cdn.sqhk.co/busibelifiv/igMrIib/logo_quiz_level_252.pdfIn PDF document text
    • http://lg-copyrightforms.com/589937527777emai.pdfIn PDF document text
    • https://cdn.sqhk.co/gaduwifawide/hdmwqhf/crazy_for_speed_2_apk_home.pdfIn PDF document text
    • http://9gusevshop.space/soap_and_detergentwjjfx.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4421959/normal_6001942cb5026.pdfIn PDF document text
    • http://distornyup.site/ragalusisuzowigatalelajaj3y26.pdfIn PDF document text
    • http://callup.today/manimuvafavufiwewunmtfa.pdfIn PDF document text
    • http://kismykeitio.best/36069154500ls2pb.pdfIn PDF document text
    • http://leqqurint.online/87521623459ojutg.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/tabobujimo/nuxepitutozebon.pdfIn PDF document text
    • https://s3.amazonaws.com/tinivukedeta/hot_rolled_steel_sheet_specifications.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e128.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE128 6484 bytes
SHA-256: 6faa34ec9ee3cf86c12472e400e09058e3597efeed720d4e95e22a4a1cfdd6e3
font_01_sfnt_off0000f6a0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF6A0 15156 bytes
SHA-256: 20fc7195f3555a813acec876ff02de43395ec19ceb068955d8c481dc9cd42c5b
font_02_sfnt_off00012542.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12542 16380 bytes
SHA-256: 2cad7dc026b1530e7bf7ef0358ae233bf5c4b8ac34e5557bb61bf9880510dfdd

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