Malicious PDF — malware analysis report

Static analysis result for SHA-256 611f1d2f1e72d57e…

MALICIOUS

PDF

74.0 KB Created: 2021-01-06 06:16:01 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-02
MD5: ad0479ac4bf0eb0aa2b7e317a8738e38 SHA-1: 78df3fdcccd4190173b9283827ad9c8d08f704e8 SHA-256: 611f1d2f1e72d57ef2b6817a310997ee3b4becbd225339b0b3c02904dd3452ca
156 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics as malicious, including a critical ClamAV detection for 'Pdf.Phishing.Trojan'. It contains a large number of external links, suggesting it is part of a link farm or phishing campaign. The primary malicious activity appears to be redirecting users to external URLs, likely to host further malicious content or phishing pages.

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://trafftec.ru/aws?utm_term=cisco+ons+15454+dwdm+troubleshooting+guide PDF link annotation
    • https://luzoxunijasuw.weebly.com/uploads/1/3/4/3/134338954/4775797.pdfIn PDF document text
    • https://cdn.sqhk.co/bagudivibi/R5LdBgX/bikovu.pdfIn PDF document text
    • https://cdn.sqhk.co/bovokolel/WNrUHly/jivinuxawe.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4414173/normal_5fad3b6c0b370.pdfIn PDF document text
    • https://cdn.sqhk.co/xumefotebe/fij51jf/16487572483.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4414682/normal_5fa2d63c15950.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/7e10e91e-6d66-4ad2-a972-5d077384872c/mabel_from_gravity_falls_pics.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/78989b63-eb8e-4519-865f-a3a0f8736be7/momewomusuzomevibedowa.pdfIn PDF document text
    • https://s3.amazonaws.com/mozedijiz/crystal_reports_8._5_iso.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/90ebc7fb-b522-4c89-ba45-dce8c7f0352b/peter_carroll_chaos.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c2f81cce-735f-441e-9ebb-b2acc099c055/71433957149.pdfIn PDF document text
    • https://s3.amazonaws.com/wenobagupexekap/xibuzigokuzefa.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3d14e95e-ac2a-4153-8b54-40065be5fab1/article_review_sample_for_students.pdfIn PDF document text
    • https://s3.amazonaws.com/pizexopenaxu/tifixibawaxikusuze.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_off0000da85.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDA85 5544 bytes
SHA-256: 2ee9020041f5dd00ee8d894e2d9639eaee8c3a8e5a8291546f6a13c545bfcd7e
font_01_sfnt_off0000ed55.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xED55 14940 bytes
SHA-256: 98027c536b477741db3b5f6d78247a347a0243557e4224ff0187e1a5ac0dfaf2

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