Malicious PDF — malware analysis report

Static analysis result for SHA-256 3a030104acd0a06b…

MALICIOUS

PDF

91.0 KB Created: 2021-02-09 20:19:39 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: ffe8f5f34c0da08e202d8b2ca7ac305a SHA-1: d6ec35d295910c415dc318c34c5212235fdcf144 SHA-256: 3a030104acd0a06bfc77294871c9ae30c965b84b89916c92cd865652531e01fc
154 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link pointing to 'crophysi.ru'. ML classification and ClamAV also flagged the file as malicious. The document body appears to be malformed or obfuscated, preventing a clear understanding of its intended lure, but the presence of the malicious URL strongly suggests a phishing or malware delivery attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 4

  • 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.
  • 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://crophysi.ru/aws?utm_term=android+apidemos+%25E4%25BD%25BF%25E3%2581%2584%25E6%2596%25B9 In PDF document text
    • https://gewasulupav.weebly.com/uploads/1/3/0/7/130740056/pipafodat_rusenimig_kokibasina_wimuvuxifezag.pdfIn PDF document text
    • https://cdn.sqhk.co/mugolino/9T9Wgid/57059724380.pdfIn PDF document text
    • https://cdn.sqhk.co/kibedutej/DUngjgg/100_days_of_sunshine_full_movie.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369765/normal_600a2332b713c.pdfIn PDF document text
    • https://vejikawotepux.weebly.com/uploads/1/3/4/8/134887167/zebeliwij_lujikipego.pdfIn PDF document text
    • https://cdn.sqhk.co/libavesonon/jifkAhS/baseball_trading_cards_target.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4470409/normal_5fcbaa73cb3df.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4480591/normal_5fcf5808b4ac8.pdfIn PDF document text
    • https://cdn.sqhk.co/gawagunikuw/4gddjic/85798910866.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/nezanurugega/zusevurovowaxozemaduk.pdfIn PDF document text
    • https://s3.amazonaws.com/teximikamukubo/enumeration_of_coliform_bacteria_in_milk.pdfIn PDF document text
    • https://s3.amazonaws.com/gelawiweza/angularjs_service_vs_factory_performance.pdfIn PDF document text
    • https://s3.amazonaws.com/batiku/workcover_queensland_asbestos_claim_form.pdfIn PDF document text
    • https://s3.amazonaws.com/bezorito/antakshari_songs_free.pdfIn PDF document text
    • https://s3.amazonaws.com/ninasivol/hacker_book_in_english.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0001177b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1177B 3512 bytes
SHA-256: 6cc4ef0ddbf3e056ef2c43c913c6370a9f40d234a206a9824b7d34da40df0be8
font_01_sfnt_off00012404.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12404 5064 bytes
SHA-256: 38bb777b26597dcbf6f3f6c637a15e4dcd012de8942d8c19b47c62e266971ab9
font_02_sfnt_off00013522.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13522 11716 bytes
SHA-256: db246448faa9d1c9518776168c92196a94e2ed1ef330b255ebb78258dd3485e6

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