Malicious PDF — malware analysis report

Static analysis result for SHA-256 ab878f22121f8a0e…

MALICIOUS

PDF

75.8 KB Created: 2021-02-21 17:20:45 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-18
MD5: f3d96610f5902f228d3e86752f30d5e7 SHA-1: 8c2bfb29df547edbf415568379973245fec8b9c2 SHA-256: ab878f22121f8a0e7452bd11f031c440642a73524b67c5c7afd70b4806f232ae
96 Risk Score

Malware Insights

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

The ML classifier and ClamAV detection strongly indicate maliciousness. The PDF contains an embedded URI pointing to a suspicious domain, likely intended to redirect the user to a malicious site. The document body is heavily obfuscated, preventing a clear understanding of its specific lure, but the presence of external URLs and the overall detection profile suggest a phishing or malware delivery attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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
  • 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=what+is+domain+class+model PDF link annotation
    • https://cdn.sqhk.co/kolusugego/ehbeSWR/rixogawupon.pdfIn PDF document text
    • http://reduslimitaly-official.site/iphone_rock_ringtone_download_freez46xj.pdfIn PDF document text
    • http://reduslim-shopofficial.site/pebozuzesarumupuwegovotab5irdn.pdfIn PDF document text
    • https://cdn.sqhk.co/sawomunuj/jJij5ij/risowujavirak.pdfIn PDF document text
    • https://cdn.sqhk.co/nuvurero/bhbijhe/top_50_petroleum_engineering_universities_in_nigeria.pdfIn PDF document text
    • https://cdn.sqhk.co/vujaderaz/hdS2he6/cool_tattoo_coloring_pages.pdfIn PDF document text
    • https://cdn.sqhk.co/tarozawowe/TwUF2aB/does_verizon_cloud_backup_contacts.pdfIn PDF document text
    • https://cdn.sqhk.co/gegenosuzun/Oibjdhj/american_sniper_shooting_snake_scene.pdfIn PDF document text
    • https://cdn.sqhk.co/gagupibi/jgu21HX/79037213606.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/ginutu/32619616972.pdfIn PDF document text
    • https://s3.amazonaws.com/zufaxepixiguxax/27480589151.pdfIn PDF document text
    • https://s3.amazonaws.com/julaxel/73410208262.pdfIn PDF document text
    • https://s3.amazonaws.com/mutirexa/writing_linear_equations_slope_intercept_form_worksheet.pdfIn PDF document text
    • https://s3.amazonaws.com/zuxime/11282481527.pdfIn PDF document text
    • https://s3.amazonaws.com/wewiro/91629754707.pdfIn PDF document text
    • https://s3.amazonaws.com/godewumazek/87809211800.pdfIn PDF document text
    • https://s3.amazonaws.com/sabegokek/2784998212.pdfIn PDF document text
    • https://s3.amazonaws.com/wovugi/paratojofujexurugoraduja.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_off0000ed96.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xED96 5096 bytes
SHA-256: 431c3aa67d8f988e7d56a2fbd0eca20e147bd5c66acaba5af235bacd9fe67049
font_01_sfnt_off0000fece.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFECE 10220 bytes
SHA-256: bf791216fe8c812c3fc27136a00ee372a6a6ad6fde5cc1a0cab16bd131fdfd7f

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