Malicious PDF — malware analysis report

Static analysis result for SHA-256 f8696d9340d5faae…

MALICIOUS

PDF

90.0 KB Created: 2021-03-15 14:15:10 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 1f098df9ddf42389fc458b98b4278b0b SHA-1: 5946b034889f909224d89c163637c385389366d5 SHA-256: f8696d9340d5faae9e319495d5860aa540b0dd348c0b579029e8b19e7a468294
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

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 0.9994

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 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://botokaw.ru/strik?utm_term=starbucks+hot+beverage+menu PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4411915/normal_5fdc4aaa24abc.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4368479/normal_6007b325444f6.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4403681/normal_5fd7704276f09.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4420765/normal_60484fefd1c6b.pdfIn PDF document text
    • http://vuvajujuli.mygamesonline.org/xunif.pdfIn PDF document text
    • http://dapajurop.mygamesonline.org/algorithme_informatique_cours_et_exercices_corrigs.pdfIn PDF document text
    • http://wumiwuzigimo.mywebcommunity.org/the_personal_mba_book_flipkart.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4467571/normal_603bf5eacfa52.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4421782/normal_603ffdccea06c.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4487206/normal_5fe246850b1cb.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4459774/normal_6026cbb7ac9c6.pdfIn PDF document text
    • http://pazadixokumox.sportsontheweb.net/gegubebepole.pdfIn PDF document text
    • http://lomigakorak.getenjoyment.net/how_much_does_hyundai_charge_for_service.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4414336/normal_60000973e2ee9.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4373004/normal_6021ab13acd60.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4403804/normal_6005d7715710a.pdfIn PDF document text
    • http://tadosuzewamu.medianewsonline.com/79383582344.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/9f139fba-e821-4788-9de8-4d56d5a7a9f6/how_to_read_court_case_numbers_washington_state.pdfIn PDF document text
    • http://xowobovu.myartsonline.com/41251807847.pdfIn PDF document text
    • http://kimoviranonaf.onlinewebshop.net/wepobapalolesubabetuf.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1efc3871-ffd7-4202-819c-59b3f77f478e/maboganedalufadamefew.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7fd4aafb-ec28-4036-8937-7a7edc7214b4/sofosafoj.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/47b256b8-4cd2-4f0b-b36d-a8069b26114c/canon_sx160_is_accessories.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_off00011ed9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11ED9 5548 bytes
SHA-256: 728f302121363ee34f8bb9474acd5966667e8c3a75b2ddd4fbf1de567f4ddbf6
font_01_sfnt_off00013197.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13197 12384 bytes
SHA-256: f3213e9751a3f79c7a72f151353e1b93fc58e3ea058f8c0164ea12293fd38014

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