Malicious PDF — malware analysis report

Static analysis result for SHA-256 feb9796fc879865a…

MALICIOUS

PDF

78.1 KB Created: 2021-02-28 18:54:03 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: a7135cf12a855f211a4d3b0ed3002e1e SHA-1: f1cf4fe5754804882b58e535dcbf339c85a83770 SHA-256: feb9796fc879865a4035743ca167dd5834701e2c37881f18817e1e5776af8a5d
96 Risk Score

Malware Insights

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

The PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains an embedded URL that, when visited, likely leads to a phishing or malware download site. The document body, though heavily obfuscated, contains text related to "Reloading press stand plans", suggesting a social engineering lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://jacksth.ru/123?utm_term=reloading+press+stand+plans PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4410415/normal_5fcf5bfe2a7cc.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4414488/normal_5febb73862d14.pdfIn PDF document text
    • https://cdn.sqhk.co/wezokobuli/iggjPcl/best_soft_rock_songs_of_all_time.pdfIn PDF document text
    • https://cdn.sqhk.co/mizogujuzo/gdq2AF6/a_radar_history_of_world_war_ii.pdfIn PDF document text
    • https://cdn.sqhk.co/wirubetena/LWMidmC/zirikerifum.pdfIn PDF document text
    • https://cdn.sqhk.co/wibononuve/gLshbhd/vukafomades.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4460954/normal_5fec40e4b06ee.pdfIn PDF document text
    • https://cdn.sqhk.co/pitekofotada/ahfdPrQ/licence_plate_bingo_printable.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4381980/normal_602f137740561.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4394071/normal_600e46f8d9a5b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4448121/normal_601bcc86939b0.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/lusabifef/exercice_algorithme_simple.pdfIn PDF document text
    • http://bejewidokani.rf.gd/refowijiliz.pdfIn PDF document text
    • https://s3.amazonaws.com/tadevewuju/bavewo.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_off0000f4b9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF4B9 5132 bytes
SHA-256: b0d8c2585db49b03d2518a2f093299c3ae743797f440ed64314c3c47dd0fcadd
font_01_sfnt_off00010646.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10646 10888 bytes
SHA-256: ede8e0ee8b814ecaccb907c74ed33a7aa105dcbd98e9cef706f071953394a212