Malicious PDF — malware analysis report

Static analysis result for SHA-256 b37bd2f8758d2813…

MALICIOUS

PDF

89.0 KB Created: 2020-12-21 06:23:44 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-05
MD5: 7b95240357a3a6a9289c2426c973272d SHA-1: bd205657106a761ea8a4dfa623a68395c4ec06ae SHA-256: b37bd2f8758d28137ed216c25f3112b4b87fc8e54bfc4a61d6009117133da8e4
96 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF file was flagged by ClamAV as Pdf.Phishing.Trojan and a machine learning classifier indicated a high probability of maliciousness. The document body contains a reference to 'cookie dozer cookie clicker 2' and an embedded URI points to 'traffine.ru', suggesting a phishing or scam attempt. No scripts were extracted, but the presence of external URIs and the phishing context strongly indicate malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

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://traffine.ru/strik?utm_term=cookie+dozer+cookie+clicker+2 PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4372735/normal_5fa468ef7fba7.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4495558/normal_5fb38205ad8e6.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4463552/normal_5fd67ecfc32a8.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366366/normal_5f8e59701bcd4.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4455380/normal_5fcdf9f48d126.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4379219/normal_5fbeb71485f6f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366633/normal_5fbdb93357ca5.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4404293/normal_5f9985d017739.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4392444/normal_5fa379a1d33bd.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.opentle.orgIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://s3.amazonaws.com/gulapore/cadillac_cien_transformers_age_of_extinction.pdfIn PDF document text
    • https://s3.amazonaws.com/jifesu/lebuzajor.pdfIn PDF document text
    • https://s3.amazonaws.com/davolazupivowi/author_s_purpose_worksheets_with_answers.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc2ae6a9955c744b5470351/t/5fc7853e93ad1a48121ea4e3/1606911295589/wetiwurefajufikel.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
    • http://www.gnu.org/licenses/gpl.htmlIn PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 5

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000eebe.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEEBE 4416 bytes
SHA-256: 41101ae5c06f1c39b8c5923156ddc12543e5b15c8de118db022e563851b48b7e
font_01_sfnt_off0000fdc2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFDC2 6036 bytes
SHA-256: ea489e00a3751b1e707f519c12c9d26a7906cde1e2d272b61053c698a749efe3
font_02_sfnt_off00010d4f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10D4F 10864 bytes
SHA-256: 4cb38de1958b410e770c3dfb3d83e0d2ac0f409597a8c5578f87b2f0bbf98b29
font_03_sfnt_off0001328f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1328F 16312 bytes
SHA-256: 531e37f64a2e7dc3bfb257675d9e6c644c7b1597f33ba9a969cd005a7ed65660
font_04_sfnt_off0001481a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1481A 4324 bytes
SHA-256: a542ec26cea93e049a2e27cd59b1347dd9bbdea13775fd7b822b3c2b3136116f

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