Malicious PDF — malware analysis report

Static analysis result for SHA-256 06eb810d1dbf2b11…

MALICIOUS

PDF

82.8 KB Created: 2021-05-04 02:43:51 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: e8e15541446e6150cb0b782560d2b2e1 SHA-1: 9c2b753d169506cda2d8067b68f844bcfab0c4fd SHA-256: 06eb810d1dbf2b11451cd259ae4de342e5b5b1c71d05d7513583df12291ba9db
186 Risk Score

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 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://kuzutuzo.ru/strik?utm_term=weber+genesis+grill+igniter+replacement PDF link annotation
    • https://cdn.sqhk.co/nuzitomizaj/jcgejbs/dewowugerukurigizudif.pdfIn PDF document text
    • https://cdn.sqhk.co/pomorezolo/jgmjijf/nimibidixesatamiv.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4378406/normal_6036165841557.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4481828/normal_605c17a791aa8.pdfIn PDF document text
    • https://cdn.sqhk.co/midusuworab/jfDiiGs/offroad_car_game_download_for_pc.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4385028/normal_606455a8a3065.pdfIn PDF document text
    • https://cdn.sqhk.co/zasemewiti/iahf1ie/60128006408.pdfIn PDF document text
    • https://cdn.sqhk.co/mirusopujame/jhpT5Lh/pacman_power_pellet_ghost_costume.pdfIn PDF document text
    • https://cdn.sqhk.co/rirexiwudag/iChihcA/fast_racing_league_wad_pal.pdfIn PDF document text
    • https://cdn.sqhk.co/rowubuvuke/fhijZQg/titetazipap.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://5b5cf7c4-d983-4e27-bd54-44d52fc9074e.filesusr.com/ugd/2f9450_635f9ee1f2aa4af1adc4b70d33fbb588.pdf?index=trueIn PDF document text
    • https://d1159ab4-cbf5-42eb-897b-83a5e94cd7da.filesusr.com/ugd/536122_661df0f693ad44ebb05a16d89c33de6d.pdf?index=trueIn PDF document text
    • https://3794eb9c-cc8b-492c-aecc-44533f76aaa6.filesusr.com/ugd/1ee69b_a8721db78b934f2c943825b2e6e63aa6.pdf?index=trueIn PDF document text
    • https://45180a89-8b92-4d54-a4c6-cdf0ad6af3c7.filesusr.com/ugd/2b98a3_84cc076ec10a480383133795e60dc369.pdf?index=trueIn PDF document text
    • https://8c17aa34-c454-4d6c-a218-8929c845e329.filesusr.com/ugd/808cd0_912fd673598840c0a7c112fa49523dc9.pdf?index=trueIn PDF document text
    • https://c81c1a69-aec6-471c-ac34-7a6800eafc69.filesusr.com/ugd/9ef1ea_603f595666ff4fdfb7542483854467db.pdf?index=trueIn PDF document text
    • https://e0529b0e-ffd4-46ae-8a9e-348c3aa8e3ae.filesusr.com/ugd/27320f_3b0d2a650a7745dd93929cc92ae7eab4.pdf?index=trueIn PDF document text
    • https://ffb80149-315c-4936-8637-e87477b606fc.filesusr.com/ugd/e7410d_ade7a21b610b49c6ae8cf3640ca40347.pdf?index=trueIn PDF document text
    • https://7fe1f042-206b-4735-a408-f56337efeeb4.filesusr.com/ugd/d34b51_58fc94dcea40418993d14010ee66cc80.pdf?index=trueIn PDF document text
    • https://7980b0ff-2efe-48f4-a442-6c87bca80713.filesusr.com/ugd/9bd8c3_470c6dc4fc7e48eba5146ae8b37b830a.pdf?index=trueIn 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_off0000f8c0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF8C0 5084 bytes
SHA-256: 0216406f3ffa5b5c94a63c7ae82d5db91ba5c06949d41d06d9000fdea7e62f33
font_01_sfnt_off000109f3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x109F3 11336 bytes
SHA-256: 669702fc7d1c4a947b2ee4645bad6c43bdc3a01cbec1a383fc6202833420434d
font_02_sfnt_off00013093.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13093 4324 bytes
SHA-256: 4fcfa7c68d76e23b667942a3ac892d2d5d88346478daafc61479ad4df4af3dd3