Malicious PDF — malware analysis report

Static analysis result for SHA-256 ddaa16aeebe06df7…

MALICIOUS

PDF

99.7 KB Created: 2020-11-17 06:00:29 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-04
MD5: 054c2d9c547aa10816e3304b7affbbb7 SHA-1: 9b90299e0aae43d9f16166051be731e6e184867c SHA-256: ddaa16aeebe06df7a6351a9e987e039b67b7a51261b3c8eaf9c72b9d1032af17
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 0.9997

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://traffine.ru/123?utm_term=kill+bill+vol+2+script+pdf+download PDF link annotation
    • https://dutitujazekap.weebly.com/uploads/1/3/0/8/130814390/1158663.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4492918/normal_5fab0bc1b154d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4464072/normal_5fb27fcc8a315.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/07ebb467-2972-4a9b-a8f0-e289d563e39c/nasaza.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ebd641c3-4486-45ed-abff-51487a5f6a4a/canon_eos_rebel_gii.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/28be3734-1e90-46ca-aeeb-33926f3212c2/wotaforu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/dc8d6e42-69a7-4f72-b721-eba24b562662/fan_yang_stevens.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d73796c8-258a-45b1-84a8-a15138edfe5b/bokesinumikafemifir.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5c2c4d6e-e913-4d18-970b-269cc92dce2b/cuisinart_soft_serve_ice_cream_maker_instruction_manual.pdfIn PDF document text
    • https://s3.amazonaws.com/wilugugo/additive_manufacturing_vtu.pdfIn PDF document text
    • https://s3.amazonaws.com/badodemebo/zizafubonenevupasifilu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d79a92f9-5df9-4153-bbc3-21c1299f1193/fudumojadonun.pdfIn PDF document text
    • https://s3.amazonaws.com/jeduzizonox/one_man_two_guvnors.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_off00014127.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14127 5544 bytes
SHA-256: 3638a5861f4f7bc376cbd5020b76adbdce23fbd45e33b6564441215f29030548
font_01_sfnt_off00015428.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15428 14388 bytes
SHA-256: 8c3af80f23aabbbdb087e08a70b8fa2a876e671277ab1a339c1d08a3437a00a5

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