Malicious PDF — malware analysis report

Static analysis result for SHA-256 8d6b972da364a6ce…

MALICIOUS

PDF

85.1 KB Created: 2021-04-11 00:58:05 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-07
MD5: e36875f31a104b2eced0249a35314923 SHA-1: b5cb02618e46a19fd8225ee7cf7635e57239949b SHA-256: 8d6b972da364a6cea4418839e6164d2223b93166081a3736f1ab08dfae425053
166 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics, including a critical ClamAV detection and an ML classifier indicating maliciousness. The presence of numerous external URIs and the 'SE_PASSWORD_ARCHIVE_LURE' heuristic strongly suggest that the document is designed to trick users into downloading a password-protected archive, likely containing a secondary payload. The document body, though partially corrupted, contains text related to a 'technical manual' and download links, reinforcing the lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9992

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
  • Password-protected archive handoff high SE_PASSWORD_ARCHIVE_LURE
    Document gives password instructions for an archive or attachment — often used to keep payloads encrypted until after gateway scanning
  • 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://dugedepap.ru/strik?utm_term=aabb+technical+manual+20th+edition+pdf+free+download PDF link annotation
    • https://cdn.sqhk.co/sinonari/6Tge3jj/packer_game_live_now.pdfIn PDF document text
    • http://dixitizer.22web.org/zagodabir.pdfIn PDF document text
    • https://cdn.sqhk.co/wozovege/e79Ndjj/60700485712.pdfIn PDF document text
    • http://callup.today/4704819729558wyg.pdfIn PDF document text
    • http://maykistore.ru/polaroid_tablet_password_recovery19bxf.pdfIn PDF document text
    • https://cdn.sqhk.co/jotapepikota/RiifIud/gojivamotadinewurolu.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4426953/normal_5fc68ef4a68c8.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4366399/normal_5fedf5c879a7b.pdfIn PDF document text
    • http://new-leggins.site/16663339053hmbi9.pdfIn PDF document text
    • https://cdn.sqhk.co/rotusorukazi/ifwhegj/bahaddur_kannada_movie_hd_video.pdfIn PDF document text
    • http://homiak.fun/keyfit_weight_limitngfoh.pdfIn PDF document text
    • http://creamspait.xyz/phpstorm_reformat_code_foldercy56m.pdfIn PDF document text
    • https://cdn.sqhk.co/tabewinudeka/FJjierI/tiny_farmhouse_cottage.pdfIn PDF document text
    • https://cdn.sqhk.co/rowubuvuke/mgehbjb/foruwukalotirex.pdfIn PDF document text
    • http://fherixq.com/track_fedex_shipment_by_delivery_addressmyqrb.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4425501/normal_5ffd746b1ae93.pdfIn PDF document text
    • http://nat-fru.space/nenikuragivufiboril01a13.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4467003/normal_601a3b7fb6b3c.pdfIn PDF document text
    • https://cdn.sqhk.co/sobekalob/fCcimii/93381412946.pdfIn PDF document text
    • http://firstdoctor.xyz/what_is_the_third_crisis_in_the_pit_and_the_pendulum7nena.pdfIn PDF document text
    • http://kemijejanurag.iblogger.org/bangla_calendar_2020_download.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4406812/normal_5fd7f9c3038e5.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
    • http://woxenebifa.rf.gd/shadow_work_journal.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_off0000ff22.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFF22 5596 bytes
SHA-256: 83e34dd4a07d0c2e583ea06b19445c03ae683200011160ff8086a5f3582bf9bc
font_01_sfnt_off000111fb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x111FB 11272 bytes
SHA-256: 6184cd719341f030acd63e59f831808e9d8ffee838609e6392e1f3658b5cfd71
font_02_sfnt_off00013848.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13848 4324 bytes
SHA-256: 0d0f64e27578eb124b8bc81c7eceacdd166e22eddd95c81328e9fbd7de2a6333