Malicious PDF — malware analysis report

Static analysis result for SHA-256 3c6c4b44abf40165…

MALICIOUS

PDF

87.4 KB Created: 2021-03-14 11:27:58 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: a2e0167b3ffac1565caeecabe47fd1dd SHA-1: da86a5fba57f8532084225b80693318855f869d5 SHA-256: 3c6c4b44abf40165e4b332fef2f0d8196af23ecbaca495d9be0d126c15913aa8
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF file contains numerous external links, characteristic of a link farm designed to improve search engine rankings for specific keywords, such as 'Padma awards 2020 list pdf download'. The ML classifier and ClamAV detection strongly indicate malicious intent, likely phishing or malware distribution. The presence of embedded URLs suggests an attempt to redirect users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

Heuristics 5

  • 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.
  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://xajibur.ru/award?keyword=padma+awards+2020+list+pdf+download
    • https://jisiresofuwidi.weebly.com/uploads/1/3/0/7/130739297/larisuwikonav.pdf
    • https://sidutoxa.weebly.com/uploads/1/3/4/8/134886075/ridixojoxatiwur-venotip-pifizobujodenum-vujuvigoxuxusa.pdf
    • https://cdn.sqhk.co/mewobonovagi/NgiieFA/acceptable_forms_of_id_for_real_id.pdf
    • https://static.s123-cdn-static.com/uploads/4488139/normal_5fe1180a2a5e4.pdf
    • https://static.s123-cdn-static.com/uploads/4501794/normal_5fff7f6e2b6dc.pdf
    • https://cdn.sqhk.co/nijusukelok/c0ohfie/65020537730.pdf
    • https://static.s123-cdn-static.com/uploads/4481539/normal_5ffef50031bcd.pdf
    • https://cdn.sqhk.co/vabolepibe/eb3Cbgg/car_balancing_challenge_on_seesaw_tracker.pdf
    • http://verefdliyvtorogo.xyz/black_and_tan_siberian_huskyvcg4o.pdf
    • http://3203epworthcres.com/environmental_impact_assessment_india7s7x6.pdf
    • https://womukowewefe.weebly.com/uploads/1/3/4/8/134889771/6326077.pdf
    • https://cdn.sqhk.co/mukujoripu/hfuV8gh/mr_73_sniper.pdf
    • https://static.s123-cdn-static.com/uploads/4428331/normal_5ff0d5280e6ab.pdf
    • http://helper-badges.com/76197877477zvtiq.pdf
    • https://cdn.sqhk.co/ronizimat/ihBZFzj/filenaxasumukikaduwi.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://504706c9-3a86-45eb-876a-6494ef133fff.filesusr.com/ugd/80c1db_ea2ede77d97e496780243d1ad9e786b5.pdf?index=true
    • https://4f65703b-d4c0-4c9c-9e30-73c8cc83ec5d.filesusr.com/ugd/54fa57_98c3b77d9bf34c74b8d83e701846e15c.pdf?index=true
    • https://696f1bd8-06c3-47a7-a8f7-e83e17ec8d18.filesusr.com/ugd/5ad03d_b7fe00bf010445009fda974859316693.pdf?index=true
    • https://uploads.strikinglycdn.com/files/fac2d475-d883-4321-990e-0f1cbe0ebf6c/how_to_business_plan.pdf
    • https://d99d9bf7-a5e0-49f2-90ac-0d1bc881463d.filesusr.com/ugd/0182ef_b8b97a3e411a40a19dfcdd06a9001c1d.pdf?index=true
    • https://uploads.strikinglycdn.com/files/948a03de-09c0-444f-bcb7-cbc6642cce8f/boleforikenukoturiwagoj.pdf
    • https://uploads.strikinglycdn.com/files/442ddefa-3dd6-4ed0-ac10-1862ba690df0/best_bookcases_for_home_library.pdf
    • https://uploads.strikinglycdn.com/files/604b7a70-8c77-4c9f-a0dd-0ffdc5a15adb/element_tv_remote_app_without_wifi.pdf
    • https://uploads.strikinglycdn.com/files/9b99968e-74fd-44a7-a0b1-3775d3bbd3df/what_is_social_construction_of_gender.pdf
    • https://4eff3ec4-d147-45d1-be73-876d9e1d0019.filesusr.com/ugd/efb3f0_340517b35b6d40068d2c5544e827de14.pdf?index=true
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000114eb.bin
8071efc95eee95c01d87f4f64e49531d0b6146c25611cdfad01e1dc2e742480c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x114EB 5552 bytes
font_01_sfnt_off000127c4.bin
88d97b529e0092622316e482701352a1c36d0a4549554e75bdfb596a1c677ace		 pdf-font-stream PDF embedded font (sfnt) at offset 0x127C4 12244 bytes

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