Malicious PDF — malware analysis report

Static analysis result for SHA-256 db3216ff0e6b199a…

MALICIOUS

PDF

80.2 KB Created: 2021-03-03 01:16:30 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-23
MD5: 47e4e07342aee8ed3d89515c9f2ce677 SHA-1: cbf568621bb34f02105ca2b31a68ed40ad38c12f SHA-256: db3216ff0e6b199a023e5b4445e4aaf7720689ccca94731ffde8fcb1102cbdc2
136 Risk Score

Malware Insights

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

The file is identified as malicious by ClamAV and an ML classifier, with heuristics indicating it's a password-protected archive lure. The embedded URL likely leads to the malicious archive or further stages of the attack. The document body, though partially corrupted, contains metadata suggesting it was generated by wkhtmltopdf, and the presence of external URIs points towards a phishing or credential harvesting attempt.

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
  • Password-protected archive handoff high SE_PASSWORD_ARCHIVE_LURE
    Document gives password instructions for an archive or attachment — often used to keep payloads encrypted until after gateway scanning
  • 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://vilenefex.ru/123?utm_term=verbos+irregulares+em+ingles+lista+completa PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4408343/normal_5fee922454501.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4505326/normal_60122832b97b7.pdfIn PDF document text
    • https://disovipogazita.weebly.com/uploads/1/3/1/3/131398104/bizaguwo.pdfIn PDF document text
    • http://nesorus.mywebcommunity.org/mizafavofizazogez.pdfIn PDF document text
    • https://cdn.sqhk.co/gujadozede/Rghhbih/79651937075.pdfIn PDF document text
    • http://defokozixeral.sportsontheweb.net/faweregujubitoma.pdfIn PDF document text
    • https://cdn.sqhk.co/noremixujor/hhaOjij/contacts_near_me_halloween.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4474205/normal_5fecb305f3ce8.pdfIn PDF document text
    • http://zoluwofemofuper.sportsontheweb.net/56262071595.pdfIn PDF document text
    • http://vozivovog.scienceontheweb.net/54948000524.pdfIn PDF document text
    • https://cdn.sqhk.co/bisidilit/ggZibgi/911_highway_emergency_rescue_game_for_android.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4404112/normal_601b293fb5bf9.pdfIn PDF document text
    • https://vomedizi.weebly.com/uploads/1/3/5/3/135312409/e8c35c.pdfIn PDF document text
    • https://cdn.sqhk.co/bijukipuj/hdQuqhf/xixid.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4446492/normal_5fd31c651fcf9.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/mamukawaxatali/tangled_2017_full_movie.pdfIn PDF document text
    • https://s3.amazonaws.com/lixisariwulo/karatabojigifatubuxoge.pdfIn PDF document text
    • https://s3.amazonaws.com/tikofaketonub/69841482912.pdfIn PDF document text
    • https://s3.amazonaws.com/wanasuvedigo/equivalent_ratios_worksheets_grade_6.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_off0000f9ab.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF9AB 5356 bytes
SHA-256: 43b4b72ee195aa8b243f65e9ec448a0c962d2a112dd57d42accc14a6661eb13f
font_01_sfnt_off00010bcf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10BCF 12156 bytes
SHA-256: 56439784e506947cb617497c77dda3844e2987100706dd49396e883eadd63ce2

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