Malicious PDF — malware analysis report

Static analysis result for SHA-256 ab15d1f3f9da5c41…

MALICIOUS

PDF

87.4 KB Created: 2021-01-29 20:07:09 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-12
MD5: ee3ac679fbf9c4865587109e9dbe5c0a SHA-1: 99c0b892c3655866523b7dc8759d9aafde3be20a SHA-256: ab15d1f3f9da5c41b0233ee9ecec11b15b92eca38542a64b0228e96093fe5ac5
96 Risk Score

Malware Insights

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

The file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains an embedded URI pointing to 'seumenha.ru', which is a strong indicator of a phishing or malware distribution attempt. The PDF structure and embedded content suggest it's designed to exploit users by directing them to this external resource.

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/123?utm_term=does+caterpillars+eat+grass PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4403543/normal_600ef7a57f606.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4369302/normal_600512512535c.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4367914/normal_5fcff3e8c8d45.pdfIn PDF document text
    • http://infonewstravel.com/fluency_made_easy_ebookkgaon.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4426280/normal_5fde39f6035fa.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4416938/normal_601278c142443.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4425915/normal_5ff6d135f07f8.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4414678/normal_5ffc30ad97331.pdfIn PDF document text
    • http://davufemalolaj.iblogger.org/effects_of_water_pollution_on_fish.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4390371/normal_5feb64e11d93f.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4387825/normal_5feb037189f5d.pdfIn PDF document text
    • http://reduslimer.website/on_my_own_karaoke_lower_keyeiloy.pdfIn PDF document text
    • http://enots.space/feperobinw0a33.pdfIn PDF document text
    • http://216tilford.com/madebisegulelodafofokire0tq47.pdfIn PDF document text
    • http://flymoney.net/128379194898qka6.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4485157/normal_5fe043f7c5af4.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/tufujifinobiro/39568199573.pdfIn PDF document text
    • https://s3.amazonaws.com/sitok/cayman_islands_company_register_number_format.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_off00011812.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11812 5100 bytes
SHA-256: 2d8c02fc1e7f67bf20cfc427afe87432e30508e7f2d8a7cf38509c1b33f351e4
font_01_sfnt_off00012983.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12983 11476 bytes
SHA-256: 759a0dc56bc65c131149a7946b198c7c6fe5947563cb5b4d4ff1ead71f9ebee2

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