Malicious PDF — malware analysis report

Static analysis result for SHA-256 d6b389c95c84672d…

MALICIOUS

PDF

83.0 KB Created: 2020-11-10 11:10:29 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-02
MD5: 1c21a63e81640b954367b0dda693c2bf SHA-1: da1a9a78ff6f7b08125807ac3ea2c47e7d8fc3f5 SHA-256: d6b389c95c84672d727cc55c91bd6cce0fc586bbafcd0861eb604396b4aef6e0
186 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 6

  • 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.
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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://trafftec.ru/strik?keyword=archetype+examples+in+disney+movies PDF link annotation
    • https://votarozoxanobo.weebly.com/uploads/1/3/4/3/134315144/wuvixupimosa.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4380070/normal_5f8b3f6eb9630.pdfIn PDF document text
    • https://wufenimikefi.weebly.com/uploads/1/3/4/3/134366244/lixosabiwuwuzofo.pdfIn PDF document text
    • https://wefamojugibe.weebly.com/uploads/1/3/1/1/131164519/8041bac1cdf17a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4449178/normal_5fa35d5d58f85.pdfIn PDF document text
    • https://kawewadibuporak.weebly.com/uploads/1/3/4/3/134371142/4070682.pdfIn PDF document text
    • https://fakimodixoto.weebly.com/uploads/1/3/0/7/130739088/botivotote_gunijana.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/d2e94b3b-20d3-4033-8145-799805b1d409/33462687163.pdfIn PDF document text
    • https://s3.amazonaws.com/lukepepe/zasiwotuvanuj.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/fd4b4568-dd22-42d2-98c2-e026c399c945/nakugenotevubadadumomasal.pdfIn PDF document text
    • https://s3.amazonaws.com/dofufiri/dark_souls_2_save_editor_for_xbox_360.pdfIn PDF document text
    • https://s3.amazonaws.com/vavebufevodutob/osmosis_worksheet_key.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0f5a8258-7ebb-44b3-b6b3-7d6f091f27d5/9566915618.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d45815d1-879c-406f-87cc-35dba4b4de24/boy_scout_troop_code_of_conduct.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9f9dae18-0a99-47eb-af3f-72728b9e57b6/adobe_media_encoder_2017_download.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_off0000eb85.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEB85 7956 bytes
SHA-256: cf4ea82e34d71523bbd3806a706b0b37325921173c7adfed75f883ed35985051
font_01_sfnt_off000105f0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x105F0 5532 bytes
SHA-256: 9cd0bf2622894cdd7ad32a4db71c264c4703b9727351b678463d5a34f738d5ca
font_02_sfnt_off000118a4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x118A4 11168 bytes
SHA-256: 3790be583ebb2544ec42187a8a92d101000031bb435e1f740d1f85adc9ecc650

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