Malicious PDF — malware analysis report

Static analysis result for SHA-256 563b4de8898f0a82…

MALICIOUS

PDF

66.9 KB Created: 2020-11-29 07:42:43 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-27
MD5: aca0ee187e51bc0ed76761d6cc579bdb SHA-1: ec3d7b206a9e413fedadac5767c83da4dd0fe134 SHA-256: 563b4de8898f0a829a93f3d14c488a7a464625ddedb3848956ff9b227226676d
214 Risk Score

Malware Insights

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

This PDF file is identified as malicious due to its inclusion of a link farm pointing to external PDFs, with one URL leading to known malicious redirector infrastructure. The ML classifier and ClamAV detection strongly indicate malicious intent. The document's structure suggests it is designed to distribute further malicious content or lead users to phishing 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/strik?utm_term=tps+2+hour+delay+schedule+scasd In PDF document text
    • https://zewurutivuzaned.weebly.com/uploads/1/3/4/8/134888434/xemixiligomoketunon.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367938/normal_5f942f79ba3c8.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4393625/normal_5f94719febcaa.pdfIn PDF document text
    • https://redodire.weebly.com/uploads/1/3/1/4/131408340/e19c478eebe6090.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368504/normal_5f945f3501b4b.pdfIn PDF document text
    • https://fuparududewon.weebly.com/uploads/1/3/1/8/131856041/riwukefikuvewet_tadizut.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4487663/normal_5fba6887f2736.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4478927/normal_5fbed7df7a8f8.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4370555/normal_5f96c03618be0.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/wupiwupiwot/zogixupovujizufog.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/97fcc159-9e31-470c-8e5a-748c0083c2b1/older_catalina_spa_manuals.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/939fbe03-60da-4be9-8ea1-b4f904414476/17357837196.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/363bda34-54c8-47ec-83db-0133e1961aac/44914800972.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_off0000c655.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC655 5344 bytes
SHA-256: 5f164d0ad4d2daf59ae0d80342f336f4577bcee4b0584a5d5e4487f76d80573b
font_01_sfnt_off0000d886.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD886 10896 bytes
SHA-256: b7a9b3ea18953568d0ae50fb845e397558751f13408f8dc22f76e77a16a331fc

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