Malicious PDF — malware analysis report

Static analysis result for SHA-256 7410fe199369eff8…

MALICIOUS

PDF

73.9 KB Created: 2020-11-24 21:54:02 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-04
MD5: 91b1b1a490648ac0cfd5d026cfa23a83 SHA-1: 92438ba1b2f0de726e189d41347e6a3a8c6349a5 SHA-256: 7410fe199369eff899a2d93c33d8114de698b5b34c499b332f184d20b29b505d
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 0.9996

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://traffine.ru/strik?utm_term=area+of+triangle+worksheet+grade+6 PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4365555/normal_5fb8213072c9a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4450338/normal_5fbd40f57d910.pdfIn PDF document text
    • https://lurukise.weebly.com/uploads/1/3/4/4/134454795/jamejuralukovupomaku.pdfIn PDF document text
    • https://zozopagutuduxiz.weebly.com/uploads/1/3/4/6/134669393/7389282.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4371524/normal_5f9a90d04cca1.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/falevi/givijaf.pdfIn PDF document text
    • https://s3.amazonaws.com/xaliwalufoguni/29913791794.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/008fd763-89f9-4d12-830d-f8fd88dd0cc8/67737233669.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/84c2f8ed-c882-434c-bb9b-dab771e8e425/peroxajaditad.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e26720af-9781-4fe7-b2fe-d406a2719cbc/71008859310.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8d108119-8b68-4d62-bf10-6d7025803c7d/gudizerofuva.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ba484dfe-a8e8-452f-8f91-4d69019cb571/panasonic_rr-_us360.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c9f5b956-40fb-4dee-b345-7babd09c717f/16619790971.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e0a1e52c-5dff-4ee7-ae14-ed4a63aa93d3/33310544239.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://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000c05a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC05A 5256 bytes
SHA-256: d0980fa4ec5d511c09205a8c997fdd6171b82ae21b17244cc4a6ec0ad505eb4e
font_01_sfnt_off0000d23e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD23E 11136 bytes
SHA-256: 9a7faf183f9274c4ec294f847b9008bbafb2abe77b850f0754252d7520a1375b
font_02_sfnt_off0000f7a1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF7A1 16092 bytes
SHA-256: 9af6fc3bf9d751f70540aea0fa47faa159a3604992cda23d2adcda3ffc5346b2
font_03_sfnt_off00010c68.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10C68 4324 bytes
SHA-256: a542ec26cea93e049a2e27cd59b1347dd9bbdea13775fd7b822b3c2b3136116f

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