Malicious PDF — malware analysis report

Static analysis result for SHA-256 b63ee21faf2937eb…

MALICIOUS

PDF

65.3 KB Created: 2020-11-19 05:23:49 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-15
MD5: eab9424417e3bc7c32848d3748eb112c SHA-1: 968b1bfb89032b1530e90f778dfe8b4610e22d7c SHA-256: b63ee21faf2937eb85c104e0072895ed7207090888b7e2f1b0a758df994a7595
214 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF contains a deceptive title and a large number of embedded links, with one identified as a malicious redirector. The ClamAV detection and ML classifier strongly indicate malicious intent, likely for phishing or distributing further malware. No scripts were extracted, but the embedded links are the primary indicators of compromise.

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=osu+won%2527t+open+files In PDF document text
    • https://runebipunozup.weebly.com/uploads/1/3/1/4/131406604/d74a5f40.pdfIn PDF document text
    • https://zadiletewus.weebly.com/uploads/1/3/4/5/134522124/7041443.pdfIn PDF document text
    • https://mufedagejex.weebly.com/uploads/1/3/4/7/134726032/lorubavevotu.pdfIn PDF document text
    • https://batarodev.weebly.com/uploads/1/3/1/3/131380453/93a0b1.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368223/normal_5fb45c1312322.pdfIn PDF document text
    • https://jevokave.weebly.com/uploads/1/3/4/2/134266272/8af20127c6676f7.pdfIn PDF document text
    • https://sizukejagu.weebly.com/uploads/1/3/2/6/132681884/9415881.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/pazifetanegapu/basics_of_mechanical_engineering_drawing.pdfIn PDF document text
    • https://s3.amazonaws.com/kukazowox/best_iptv_service_for_usa.pdfIn PDF document text
    • https://s3.amazonaws.com/xonobijikivo/going_to_or_will_worksheet.pdfIn PDF document text
    • https://s3.amazonaws.com/kisimujuk/37070223645.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/126a7455-f8e2-421d-8727-1f2a6a79c2f4/jimi_hendrix_electric_ladyland_torre.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_off0000c4f0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC4F0 4744 bytes
SHA-256: ef4c71a4285bf22a0d5dd2609210b6c83fc933a9797dc587e2f712a582c371d9
font_01_sfnt_off0000d54c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD54C 10416 bytes
SHA-256: d06f103a0a6099e0edd2b785b2409737a0715521f9a6dba831d3518382fe0387

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