Malicious PDF — malware analysis report

Static analysis result for SHA-256 df0b3d7b8659c088…

MALICIOUS

PDF

80.6 KB Created: 2021-06-03 18:04:51 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: fef0033119c6f2027dc660d0c7f013e3 SHA-1: c21069fdecbd36da188f5d39d6b5cfbc84d497ca SHA-256: df0b3d7b8659c088fcae666d843273b160febf8a403ae17890c315bc38323a8f
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://crysiq.ru/pbw?utm_term=gear+manufacturing+process+in+hindi PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4481684/normal_602ef7e63dcee.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4387040/normal_601037cf7e37f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4484633/normal_6039378926182.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4374957/normal_60517241e381a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4411503/normal_605460ed93e08.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4489850/normal_6041d21a0474f.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://fipivuzigoge.pbworks.com/w/file/fetch/144422028/tabujen.pdfIn PDF document text
    • http://vatojorisa.pbworks.com/f/how_can_i_update_my_photo_in_aadhar_card_online.pdfIn PDF document text
    • http://tujelupirobe.pbworks.com/w/file/fetch/144519879/arduino_afficheur_7_segments_4_digits.pdfIn PDF document text
    • http://mizunebapod.pbworks.com/f/12370470185.pdfIn PDF document text
    • http://jutifakukap.pbworks.com/f/histology_text_and_atlas_brijesh_kumar_download.pdfIn PDF document text
    • http://xuwuziz.pbworks.com/f/rajaxapodekudevozezem.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/66ebf15d-f3fc-438e-a8f5-4976f7a32be5/dell_vostro_15_5000_drivers.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c965688a-8152-4226-b8f9-c022226e44b7/97830020024.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f7392fed-6ebf-40a5-ab93-d9d89cb770ec/48452672257.pdfIn PDF document text
    • http://nosiravuga.pbworks.com/f/how_to_get_qr_codes_for_pokemon_ultra_sun.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/10a499a7-1e73-4ba8-890e-e76e2af17d35/99425875153.pdfIn PDF document text
    • http://jitilabajeko.pbworks.com/w/file/fetch/144484665/90704063300.pdfIn PDF document text
    • http://disisopaz.pbworks.com/w/file/fetch/144562866/crsi_design_handbook_2012.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/31d7a96d-98a1-40f0-aaad-ad78f542d99e/pencil_drawing_techniques_free_download.pdfIn PDF document text
    • http://xosufixemuf.pbworks.com/f/71554085074.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_off0000ff89.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFF89 5568 bytes
SHA-256: 003feb4d585f8c1da1e7c0084fa4a6f7dbd6f230e0afb82d3ba747f3e47f1805
font_01_sfnt_off00011252.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11252 10208 bytes
SHA-256: 7ab4a8e51167690c86ee359e43ce5b84f248b1cfc19963bef5c644dc09aadb62

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