Malicious PDF — malware analysis report

Static analysis result for SHA-256 806560e635219b26…

MALICIOUS

PDF

63.9 KB Created: 2020-12-14 17:43:32 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-04
MD5: d7cb83a7906d0d8edcd1eb06ee005f00 SHA-1: d5a5e86c587514e55bdc1d73ebe0b24c17847eda SHA-256: 806560e635219b263a3b5943b1121bfbcf338bd881fd04a1e9e8296235c0966f
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 0.9998

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://trafffi.ru/strik?utm_term=nothing+but+the+blood+chords+pdf+c PDF link annotation
    • https://sabidodavo.weebly.com/uploads/1/3/1/4/131408103/tamusujike_jizimorataban_piromobo.pdfIn PDF document text
    • https://gokopawe.weebly.com/uploads/1/3/4/4/134493337/4589730.pdfIn PDF document text
    • https://solubowobadiwu.weebly.com/uploads/1/3/4/6/134642134/164d417d2.pdfIn PDF document text
    • https://fulafokowezoje.weebly.com/uploads/1/3/4/3/134384829/nuzebefizuzejomaji.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://static1.squarespace.com/static/5fc1583bff13940aa242bd98/t/5fc3e65f5147b14804aae795/1606674017984/11908979197.pdfIn PDF document text
    • https://s3.amazonaws.com/fosagobomap/hunter_i_core_manual_operation.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fbce344be7cfc36344e8aaf/t/5fbf59603c02f22b9d047ae6/1606375779446/67692321244.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b415b97f-83e9-4109-a785-9b42f383c2cc/tagojakik.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a5fcb416-91bc-49db-94be-76e26753bf55/80303440694.pdfIn PDF document text
    • https://s3.amazonaws.com/wajibile/22885155002.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc35efaaffbf90a66fa355a/t/5fc8177fb0f45b2a3d177ec4/1606948735724/23358113211.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/32989d05-80c8-4b77-8451-5224d0ca55f7/95568448519.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7b333f6f-ba10-46ce-8182-806a29c655ec/wumipugokedi.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_off0000bc8b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBC8B 5316 bytes
SHA-256: f2a83049c4b6a4a55d2f5464f4475d4046702a9372c7319a7cbd6222945ca66d
font_01_sfnt_off0000cea5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCEA5 10476 bytes
SHA-256: ee0676b1d9617c365a12f2df3b26b396d0e513192b0fe28b4c38701ab34ec6d7

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