Malicious PDF — malware analysis report

Static analysis result for SHA-256 dee992c3cc194bdd…

MALICIOUS

PDF

75.9 KB Created: 2020-11-14 13:37:11 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-04
MD5: 6b93586dd9d1498730171776a510b602 SHA-1: 5357b26bda4597ca05707c1aba5adcd8b634f1e6 SHA-256: dee992c3cc194bdd1e321cf030f08dd43a2539f8bf5ad3d1ada13b21fa4bee3a
156 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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://traffking.ru/strik?utm_term=subjetividad+de+los+valores PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4371790/normal_5fa4ce2b3684e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367923/normal_5f8b787323bfe.pdfIn PDF document text
    • https://tivakoxidedopa.weebly.com/uploads/1/3/0/7/130776298/8fb3b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4378167/normal_5fa4609c228af.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366035/normal_5f8b30402a95d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4374838/normal_5f93fcdebf96b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4380076/normal_5f8f93d4bc786.pdfIn PDF document text
    • https://debasomi.weebly.com/uploads/1/3/0/7/130739769/816a77e35.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4385413/normal_5fa5ed59e0139.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://s3.amazonaws.com/rawesaragegugar/alt_codes_table.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7f828b04-cd24-482d-9381-99c4bd7fb424/pagibadogobapisawi.pdfIn PDF document text
    • https://s3.amazonaws.com/tuzamada/data_structure_and_algorithm_tutorial_download.pdfIn PDF document text
    • https://s3.amazonaws.com/laradusa/39537770010.pdfIn PDF document text
    • https://s3.amazonaws.com/bodepova/25720365992.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000db36.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDB36 4976 bytes
SHA-256: 2dff407cee717536c6295903c33082f704d527b15e44761fdcd7d07e87693ef2
font_01_sfnt_off0000ec2b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEC2B 11880 bytes
SHA-256: 95e7903a36143bd7051e2ea08042833923457f27082fad1efed31729b4e6b2a5
font_02_sfnt_off000112db.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x112DB 4324 bytes
SHA-256: cd94ef65598b1866d0653cdd88243d989fd81359c0e770c2d3a4858f1c2f6d34

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