Malicious PDF — malware analysis report

Static analysis result for SHA-256 0c64f16a79df9dd1…

MALICIOUS

PDF

67.1 KB Created: 2021-02-18 19:53:29 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-30
MD5: f537fdc190fd8422c08c859e0cfa94ef SHA-1: ed40436353bc3d241348c30452ff70b56a54d74b SHA-256: 0c64f16a79df9dd1e058243efcbf9db2daf8fbd885b6c3d22777c177e2e7be4d
156 Risk Score

Malware Insights

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

The PDF file contains numerous external links, flagged as a link farm, suggesting a phishing or malware distribution attempt. The embedded URLs, such as 'https://druttle.ru/strik?utm_term=michael+vey+book+3+audiobook+free', are likely used to redirect users to malicious sites. The ML classifier and ClamAV detection strongly indicate malicious intent, consistent with a phishing lure.

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://druttle.ru/strik?utm_term=michael+vey+book+3+audiobook+free PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4500897/normal_5fed4c070d1d4.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4409604/normal_5fcdcf64b3af6.pdfIn PDF document text
    • https://popupobapovuzus.weebly.com/uploads/1/3/4/0/134012290/8cf4ccb.pdfIn PDF document text
    • http://useporte.xyz/honda_fit_2007_sport_modexmtq7.pdfIn PDF document text
    • https://nomabedipami.weebly.com/uploads/1/3/1/4/131437379/57687cb1.pdfIn PDF document text
    • http://likelid.xyz/faluxesirulodetixujoy0yq3.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4493920/normal_601dbba93f477.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4459035/normal_6017b189de2eb.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4366666/normal_5fec41c5118a0.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4474723/normal_5ff0764a4c394.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4413458/normal_5ff79c6b4fade.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4369191/normal_5feb9fc0d3676.pdfIn PDF document text
    • https://laximazerafa.weebly.com/uploads/1/3/4/2/134235816/9f182acb008bb2.pdfIn PDF document text
    • http://small-italy.space/20107188834p8bjb.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4417423/normal_5ff3d75ee97bc.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/bajuse/vscode_format_on_save.pdfIn PDF document text
    • https://s3.amazonaws.com/xebuvuwov/mipukowe.pdfIn PDF document text
    • https://s3.amazonaws.com/laginekux/movegijijera.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_off0000c73e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC73E 5468 bytes
SHA-256: 9603cd6d5d0fa386fcc667cda92d74a86d5c879784a1aa5ed492c1e2bae50943
font_01_sfnt_off0000d9eb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD9EB 11296 bytes
SHA-256: 0eb8f317a9485ad0b9e15cb73891ee85e125bc66e07452b2ca772907107a040a

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