Malicious PDF — malware analysis report

Static analysis result for SHA-256 892cd966f18950bc…

MALICIOUS

PDF

76.4 KB Created: 2021-02-20 01:49:56 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-07
MD5: b3efe3c33ac17b8e25a6b711fd667f6b SHA-1: 8aed97dd817778c45966cb489d838aeac6b8c7ec SHA-256: 892cd966f18950bce96c7e437886ececd4695240bc2612234b50d5cb597c91d7
104 Risk Score

Malware Insights

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

The PDF contains an embedded URI pointing to a suspicious domain, and heuristic analysis indicates it uses an urgency lure. ClamAV detection confirms this is a phishing-related trojan. While no scripts were directly extracted, the PDF structure and embedded URI suggest an attempt to redirect the user to a malicious site, likely for credential harvesting or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Urgency / deadline lure low SE_URGENCY_LURE
    Document contains urgency or deadline language ('account will be terminated', 'action required within 24 hours', etc.) — useful context, but low-signal without other findings
  • 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://seumenha.ru/strik?utm_term=sears+water+softener+installation PDF link annotation
    • http://rollernefrit.xyz/93497921322g8fws.pdfIn PDF document text
    • http://hookup153.space/53000671761yfwk2.pdfIn PDF document text
    • https://cdn.sqhk.co/vapelomusanu/gdFhihg/easy_moist_lemon_cake_recipe_south_africa.pdfIn PDF document text
    • http://amin-ukraine.net/mcgraw_hill_reading_wonders_grade_53n1k3.pdfIn PDF document text
    • http://verification-help.business/vlc_android_tv_usbtdre4.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4530323/normal_6005db2cedb19.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4369900/normal_5ff982377b055.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://kevokafi.rf.gd/limejokulujujo.pdfIn PDF document text
    • https://s3.amazonaws.com/fofeguj/chrome_browser_for_windows_8._1.pdfIn PDF document text
    • https://s3.amazonaws.com/rovikibixu/activesync_android_email.pdfIn PDF document text
    • https://s3.amazonaws.com/luropi/88110803236.pdfIn PDF document text
    • https://s3.amazonaws.com/satuja/63335557526.pdfIn PDF document text
    • http://zazujipediwa.rf.gd/43630004750.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_off0000ef08.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEF08 4956 bytes
SHA-256: 5aff4aa5f711b029a56df6b84a315a99a9048edda9f9568c84a1893b9c6db1f0
font_01_sfnt_off00010002.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10002 10768 bytes
SHA-256: b737586531510026bebf73fa45bb4e7d28f2897e2f85bad838b174e3ca8aa682

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