Malicious PDF — malware analysis report

Static analysis result for SHA-256 aea0d7291399fb21…

MALICIOUS

PDF

32.5 KB Created: 2020-11-04 23:57:44 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-02
MD5: 787b2d00b84c49904df2afb0b2011e05 SHA-1: daeb10d8897f8b1836e23b4ab897ad44e0ed5dcb SHA-256: aea0d7291399fb21ed1019ff9f13a2ae4eced80c7e4630ec09154254b0acd34e
102 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF document was flagged as malicious by an ML classifier. It uses an urgency-based lure. The file routes users through malicious redirector infrastructure. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 4

  • 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.
  • Urgency / deadline lure low SE_URGENCY_LURE
    Document contains urgency or deadline language ('account will be terminated', 'action required within 24 hours', etc.) — useful context, but low-signal without other findings
  • 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://cctraff.ru/strik?keyword=visual+analogy+guide+to+human+anatomy+4e In PDF document text
    • https://cdn-cms.f-static.net/uploads/4370268/normal_5f8e5ef6deec1.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369315/normal_5f8d33b489a56.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4373004/normal_5f9f7f72d1a1c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366668/normal_5f8861394bf44.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367674/normal_5f965d9099e86.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4408993/normal_5f9e3a22a4538.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4378857/normal_5f8d1b76c27a2.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369655/normal_5f9c6ddb4c816.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367951/normal_5f89247c6d8b3.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/8bbc1adf-d99e-4a33-a117-5bb9df340bb4/7030895303.pdfIn PDF document text
    • https://s3.amazonaws.com/nezanurugega/72901462597.pdfIn PDF document text
    • https://s3.amazonaws.com/fonazuzixagizir/77325855890.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_off00004252.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x4252 5296 bytes
SHA-256: 8f7d3b3ced21e1a75870c1b81b323509cc3c1dc0054d4395ae27f4688bf4508c
font_01_sfnt_off0000543d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x543D 9632 bytes
SHA-256: ad269186d938a893620ce00c0b1ecfddd0b5ba9f0345ea57197848cf3ba8771d

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