Malicious PDF — malware analysis report

Static analysis result for SHA-256 7ec1381f50f93c29…

MALICIOUS

PDF

76.1 KB Created: 2021-02-23 18:31:50 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-03
MD5: 616e8951ca9ccbe381569c46caf4a3fc SHA-1: 44e2aebbd35b473e4e798e014e200181d9d1c5ef SHA-256: 7ec1381f50f93c29d7fd4e4f46523458d9237623a5127b1242ddcf03de1c19b5
96 Risk Score

Malware Insights

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

The PDF document contains an embedded URL that points to a suspicious domain, identified by ClamAV as Pdf.Phishing.Trojan. The document body, though truncated, suggests a lure related to weight loss, a common theme in phishing and scam campaigns. The presence of an external URI and the ML classifier's high confidence further support a malicious intent, likely to redirect the user to a malicious site for further exploitation.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://bologen.ru/123?utm_term=top+10+foods+to+avoid+to+lose+weight PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4376101/normal_6001f83fd228c.pdfIn PDF document text
    • http://kpupnov.pro/dogulikorikidolaginuzuwet2xxsf.pdfIn PDF document text
    • http://stavki-na-sport.site/25th_wedding_anniversary_invitations_free_templatesgoyxf.pdfIn PDF document text
    • https://niresofet.weebly.com/uploads/1/3/2/6/132682193/fcecb589d42f0.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4383146/normal_5fff38454620a.pdfIn PDF document text
    • https://dejurepezuneron.weebly.com/uploads/1/3/1/4/131452785/pesexuwora_visajul.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4407747/normal_60025452f0d4b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4448343/normal_6030144ea2f15.pdfIn PDF document text
    • https://momobalujinas.weebly.com/uploads/1/3/2/3/132303205/6681247.pdfIn PDF document text
    • http://fbcopyright-center.com/novel_rich_peoples_problems9rrns.pdfIn PDF document text
    • https://velumosatowe.weebly.com/uploads/1/3/4/8/134883763/vivulilexugoja.pdfIn PDF document text
    • http://cherrypimp.online/jileluvifobopimosawav2ga8n.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4444366/normal_602ae297e5a14.pdfIn PDF document text
    • http://yildirimotobursa.com/ios_14_beta_control_center_bugwf3uo.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4417535/normal_602b5d9d69e5e.pdfIn PDF document text
    • https://rujunile.weebly.com/uploads/1/3/2/7/132710621/6710214.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4407064/normal_600831237bcb8.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/lodazojamuva/farmall_super_c_starter_rebuild_kit.pdfIn PDF document text
    • https://s3.amazonaws.com/zodawanuror/diy_large_format_camera_kit.pdfIn PDF document text
    • https://s3.amazonaws.com/fojaxexino/kabewapinuzokesewaja.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_off0000eca1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xECA1 5504 bytes
SHA-256: d2d932467295513b578d339040641b5c0a625b4da9fcd86355bf407c9c35ba56
font_01_sfnt_off0000ff7a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFF7A 10232 bytes
SHA-256: e1f067a344a4934bb1c6041e68136c6441cfb50de7255ed1b0236186dfad07b6

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