Malicious PDF — malware analysis report

Static analysis result for SHA-256 6e2c86dc324b67a4…

MALICIOUS

PDF

69.2 KB Created: 2020-11-18 17:59:30 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-26
MD5: 2b16062aa9130605fbd68fc80e6c517d SHA-1: c11cb1932bd72376a4cf8cd64a1e4f59e63eb273 SHA-256: 6e2c86dc324b67a488ed347d73527e32a5c453d37a174b247d281117dc6d9909
214 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous embedded links, with critical heuristics indicating it functions as a redirector to malicious infrastructure and a link farm. The ML classifier and ClamAV detection strongly support its malicious nature. The primary attack pattern involves luring users through a malicious PDF to potentially harmful external sites.

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
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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.
  • 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://gettraff.ru/123?utm_term=o%2527malley+the+alley+cat In PDF document text
    • https://wuxurabe.weebly.com/uploads/1/3/4/6/134608123/xobaxob-gixumikolit-giratodex.pdfIn PDF document text
    • https://mawanegofarate.weebly.com/uploads/1/3/4/4/134466522/worojolepabudo.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4388272/normal_5f9ddb642df09.pdfIn PDF document text
    • https://sajapomef.weebly.com/uploads/1/3/4/4/134402225/rowesurusaremin_gokokaditiboga_piwaxagebo.pdfIn PDF document text
    • https://zizuralozirufu.weebly.com/uploads/1/3/1/4/131483034/4297307.pdfIn PDF document text
    • https://natizupasa.weebly.com/uploads/1/3/1/4/131437725/4418160.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366366/normal_5f8e187c19c63.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4378175/normal_5f9aee144617f.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/susopuzupure/august_2019_calendar_cute.pdfIn PDF document text
    • https://s3.amazonaws.com/felasorarabipis/gebuwula.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f71b062a-136f-49da-874a-cd9b6e6c7fa7/86214799013.pdfIn PDF document text
    • https://s3.amazonaws.com/ginutu/infinite_improbability_drive_quotes.pdfIn PDF document text
    • https://s3.amazonaws.com/zosevid/jivufokofezibirumad.pdfIn PDF document text
    • https://s3.amazonaws.com/jazofi/resultant_vector_angle_calculator.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_off0000c7cc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC7CC 4452 bytes
SHA-256: 181513e9bb16563e5b5aea666d80ccc6392c12888bcd1f3ab686ead96afc105d
font_01_sfnt_off0000d6f9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD6F9 10320 bytes
SHA-256: cce09b77be786c0775b7aee5a122d4a7c15f77c1d44215415e185102e926a014
font_02_sfnt_off0000fa1d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFA1D 4324 bytes
SHA-256: d1f4a20f0e35a0564be54678b929bb8c711862c507f070c2b9a6abea8daf4378

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