Malicious PDF — malware analysis report

Static analysis result for SHA-256 5b95dbdec5f8e413…

MALICIOUS

PDF

69.4 KB Created: 2020-12-13 22:07:21 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-11
MD5: 45723bd38d1bed281cfc992c4f230f14 SHA-1: 07893ae13b7988749160b43dbf7a7c826ebe9e2b SHA-256: 5b95dbdec5f8e413ee4fc0535cdc0d11c3563fafceba92c6c57d21f1d7cfdee8
156 Risk Score

Malware Insights

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

This PDF file was identified as malicious by multiple heuristics and an ML classifier. It contains a large number of external links, many of which are to other PDF files, suggesting a link farm or SEO manipulation tactic. The primary malicious URL identified is trafffe.ru, which is likely used to host or redirect to further malicious content. The document's content, though heavily obfuscated, appears to be related to a "Naruto dating sim cheat", a common lure for phishing or malware distribution.

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://trafffe.ru/strik?utm_term=naruto+dating+sim+cheat PDF link annotation
    • https://kileligujet.weebly.com/uploads/1/3/4/4/134457719/4349333.pdfIn PDF document text
    • https://kenolafopufa.weebly.com/uploads/1/3/4/5/134528829/webiv-fepusezixuj.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4419430/normal_5fc157cbcf3f8.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4391602/normal_5fd0e9bc9078e.pdfIn PDF document text
    • https://larulesa.weebly.com/uploads/1/3/4/7/134717423/nebuvirifitaru.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/leguvefu/42332806914.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/71a43b08-1015-46f9-9050-91157d62092b/mypay_army_w2.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e71215a4-af82-4390-83ec-c8bcfeb4da91/formato_condicional_ejemplos.pdfIn PDF document text
    • https://s3.amazonaws.com/gedimuta/77642841371.pdfIn PDF document text
    • https://s3.amazonaws.com/wesezuzuvalirik/blue_cross_blue_shield_arkansas_provider_manual.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b42dbf5f-6d7e-48ac-8a7c-62a27b284239/29329981484.pdfIn PDF document text
    • https://s3.amazonaws.com/sorogamat/amnicon_lake_fishing_report.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_off0000c82a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC82A 5172 bytes
SHA-256: 8dfcaa5a745137d38b4b77d76c0a5d2ee350536a23ed7c686a433add184527b7
font_01_sfnt_off0000d991.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD991 9768 bytes
SHA-256: f5299a5cf95cfa651fc94bf19f316b3ac3a9afb47214bbcb44a5ae8893e1018a
font_02_sfnt_off0000fb07.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFB07 4324 bytes
SHA-256: cd94ef65598b1866d0653cdd88243d989fd81359c0e770c2d3a4858f1c2f6d34

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