Malicious PDF — malware analysis report

Static analysis result for SHA-256 dde342090b9fdbc6…

MALICIOUS

PDF

75.5 KB Created: 2020-11-10 03:10:32 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-02
MD5: 5225b88df4a628591ff2183e35348968 SHA-1: 12863349210b6075d424fdbc9035fca97ee16a63 SHA-256: dde342090b9fdbc64c731fe7a06ad2e7f9e7b0c54f76333b44a7227fb79795fa
156 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 ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

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://traffking.ru/123?keyword=pegs+and+jokers+game+pattern PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4365536/normal_5f877712eab5d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4426410/normal_5fa9cd5fd9517.pdfIn PDF document text
    • https://mupaxezofede.weebly.com/uploads/1/3/4/3/134317166/2183639.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4426967/normal_5fa8201b9abdc.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4406789/normal_5f9aac65d013a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4406785/normal_5f9cea703ee5d.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/liguwubore/mofesizajedenezebonezero.pdfIn PDF document text
    • https://s3.amazonaws.com/nijudow/zagumiminedife.pdfIn PDF document text
    • https://s3.amazonaws.com/damerirazib/victorian_windows_replacement.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/bba8e60c-3398-4391-92d7-30258c4a0b49/17409131220.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6c62251a-b061-43f6-bcb3-6d8f7bde3b60/50932862451.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3849e6a0-8e70-44c9-ac30-f942b1b90159/1999_arctic_cat_300_4x4_operator_manual.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/318f6a69-9199-47e2-a7a6-5dbbf45b87fe/24948094378.pdfIn PDF document text
    • https://s3.amazonaws.com/pazifetanegapu/10th_bipartite_settlement_aiboc.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e06b6df4-99b7-4ef1-86dc-2e573b197f70/tin_star_review_season_2.pdfIn PDF document text
    • https://s3.amazonaws.com/wilugugo/antigone_robert_fagles.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_off0000dbcd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDBCD 5128 bytes
SHA-256: e0faf0dba1de3dc143cd98579ae92c5c80db10e2e969ad523536f2839279dc9b
font_01_sfnt_off0000ed30.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xED30 10852 bytes
SHA-256: 6bda444d1fc67f6d530383e11d86effa073915d723e02c392f7a36c459415b74
font_02_sfnt_off00011267.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11267 4324 bytes
SHA-256: a542ec26cea93e049a2e27cd59b1347dd9bbdea13775fd7b822b3c2b3136116f

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