Malicious PDF — malware analysis report

Static analysis result for SHA-256 04bf0c7ea8218d3a…

MALICIOUS

PDF

77.2 KB Created: 2021-03-09 02:39:20 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-25
MD5: 08fb06c31f32012e69d6ccda77a364f6 SHA-1: 5703a4e03419503c63c31c38ab4dca7325de78e7 SHA-256: 04bf0c7ea8218d3a4ab6694b86ec812609b5f3caa63dd075f526c4031a7cd5d9
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 0.9997

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://baarspo.ru/123?utm_term=beach+buggy+racing+2+hack+apk+2019 PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4366348/normal_6039cbd70c48e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4480755/normal_6031ce919e0a4.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4406216/normal_601b3f8bcda74.pdfIn PDF document text
    • http://sipataj.sportsontheweb.net/my_grandmothers_house_poet.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4481821/normal_6007699e169ea.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4424010/normal_6018f83e26197.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4459054/normal_601b9965a4be3.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4403679/normal_5fe2e8051cdfc.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4450140/normal_60346eebb1d9e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4485828/normal_60353f42e17c5.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4499972/normal_60013d343e45b.pdfIn PDF document text
    • http://gegebafebofad.scienceontheweb.net/6682234651.pdfIn PDF document text
    • http://mikazuxo.mypressonline.com/commodore_64_emulator_windows_xp.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://nabenejajoko.myartsonline.com/raxoselewubitim.pdfIn PDF document text
    • https://s3.amazonaws.com/xoguwavosuje/performing_a_blood_smear.pdfIn PDF document text
    • https://s3.amazonaws.com/jojitagifuva/86390739287.pdfIn PDF document text
    • http://zotubune.myartsonline.com/20829382436.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ecb43827-b36d-4a88-8645-b2f7b500dd3d/solid_state_physics_textbook.pdfIn PDF document text
    • https://s3.amazonaws.com/zozuxukoxo/transpo_voltage_regulator_tester_manual.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/be8a6510-c657-4085-80ed-b19143b2c0f1/que_lleva_un_proyecto_de_investigacion.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_off0000e497.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE497 2880 bytes
SHA-256: 5f03d2c6bc08d28d18892b3fd5153044a2fff6aad81dd629dfd07635bf6cf50e
font_01_sfnt_off0000eed4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEED4 5820 bytes
SHA-256: ecf3733ef3339c882c2e97faa3bd6498fa376b239de5b1ac10b2ea1351482eac
font_02_sfnt_off000102b2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x102B2 10468 bytes
SHA-256: 7c378f599d26121f541858b178697ac8f68db57413e3db9dbbc5ae1684a220b0

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