Malicious PDF — malware analysis report

Static analysis result for SHA-256 6f091a9a603f4fee…

MALICIOUS

PDF

76.9 KB Created: 2021-02-25 05:48:45 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-26
MD5: dc29e031732b66766c2b7e469f4d13eb SHA-1: 6255e04eb45df7bbda3575f1fc6110bd21ce4c6d SHA-256: 6f091a9a603f4feeddf88291242178e7ff523c409299fb152599692b9e107439
96 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 ClamAV detection confirms its malicious nature. The ML classifier also flagged it with high confidence. The document body, though heavily obfuscated, suggests a lure related to 'weight watchers scale', which is likely a pretext to direct the user to the malicious URL 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=how+to+get+weight+watchers+scale+to+work PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4383165/normal_6002ff129a313.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4408587/normal_6007386a090b4.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4385880/normal_5fec75d79fd07.pdfIn PDF document text
    • http://pearhaidhr.fun/682878802056j2pf.pdfIn PDF document text
    • http://cmbmarketing.agency/mod_dragon_mania_unlimited_gemsdfrmx.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4386828/normal_6036cad023c41.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4459774/normal_5fcc35a718c81.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4495241/normal_5fefcef3c9a3e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4382639/normal_60314a4318719.pdfIn PDF document text
    • http://goodik.fun/mimadawodozobizevowwip1y.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4492246/normal_5fdb6499cc80c.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/pululusodogi/tababososaxi.pdfIn PDF document text
    • https://s3.amazonaws.com/xijalovelokolep/54508967552.pdfIn PDF document text
    • http://jugefewaxuxuf.epizy.com/le_royaume_betsileo.pdfIn PDF document text
    • https://s3.amazonaws.com/tutasujal/al_di_meola_sheet_music.pdfIn PDF document text
    • https://s3.amazonaws.com/nedijowewoded/classroom_management_plan_template.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_off0000edb4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEDB4 5176 bytes
SHA-256: 7909fd716f2e31b461c5f58686dd4542f2a061c5e89c205359366e539cd76c28
font_01_sfnt_off0000ff65.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFF65 11312 bytes
SHA-256: b3c9119bd5224c0d56b5b74f29bbe87f465d08c7b6c6d2f81a3abd89831500d2

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