Malicious PDF — malware analysis report

Static analysis result for SHA-256 4e785d291b716c4d…

MALICIOUS

PDF

79.4 KB Created: 2021-02-10 16:23:22 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-11
MD5: 1fd82bbceee07738e7b448f9c5bdb392 SHA-1: 3e71f5a42bb6813a5d5d37a807b1d45cd177a2f2 SHA-256: 4e785d291b716c4dc999c70d6e65bcbd9468f50eaa1d510252bcefd301c32a90
136 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF file was flagged by a machine learning classifier and ClamAV as malicious, specifically as a phishing trojan. Heuristics indicate it uses a social engineering lure to prompt the user to install a browser extension or update, a common tactic to facilitate malware delivery or credential theft. The embedded URL points to a suspicious domain, likely serving as a distribution point for malicious content.

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
  • Browser extension / update installation lure high SE_BROWSER_INSTALL_LURE
    Document tells the user to install a browser extension, plugin, viewer, or browser update to view content — a common social-engineering path for credential theft and malware installation
  • 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://jottigo.ru/123?utm_term=how+to+get+french+accents+on+google+docs PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4491148/normal_5ff9e1a22c5d5.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4419211/normal_6003c5c8340a7.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4421612/normal_5fd22123af5e8.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4481990/normal_5fe8ba5f30b10.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369501/normal_5fd66400dedbb.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4502248/normal_5fd377c133190.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4486346/normal_5fc81a80affde.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4393485/normal_601e62cf280d0.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4444655/normal_6023d4083a17b.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://s3.amazonaws.com/rutufokedizon/boss_engira_baskaran_dialogue_audio.pdfIn PDF document text
    • https://s3.amazonaws.com/lomuper/ropunusu.pdfIn PDF document text
    • https://s3.amazonaws.com/zuguvoxoki/street_fighter_x_tekken_apk_android.pdfIn PDF document text
    • https://s3.amazonaws.com/dobikasukavu/61995668176.pdfIn PDF document text
    • https://s3.amazonaws.com/xalexojaxipud/13957181955.pdfIn PDF document text
    • https://s3.amazonaws.com/garorowa/95963998578.pdfIn PDF document text
    • https://s3.amazonaws.com/gomakobez/jovimanivijumoduveradu.pdfIn PDF document text
    • https://s3.amazonaws.com/dalava/fadusapapimabemupugisa.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_off0000e794.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE794 5076 bytes
SHA-256: 3a305afac354afdf21ce95fb7140787fb62e8b43360a277ec7ebe6d94b9fd0ab
font_01_sfnt_off0000f8dc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF8DC 13800 bytes
SHA-256: 1ffedbece11585a6144988d6304bb4ddd6ef7ec3add7730a45f47b24eb2b2e2a
font_02_sfnt_off0001220f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1220F 4324 bytes
SHA-256: cd94ef65598b1866d0653cdd88243d989fd81359c0e770c2d3a4858f1c2f6d34

Open this report in the interactive analyzer, or submit your own file for analysis.