Malicious PDF — malware analysis report

Static analysis result for SHA-256 8580535f1786c419…

MALICIOUS

PDF

84.0 KB Created: 2021-03-19 11:03:41 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-27
MD5: ee8dfcd2e46bf1876211fea699cc9c7f SHA-1: c0965097b9d1ae1786f3a6a8b7dae9f2bfbd0fd3 SHA-256: 8580535f1786c4194549d87949bb9fb8863ddc29af71960dfe1a236bd83ea08e
166 Risk Score

Malware Insights

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

The PDF document is flagged as malicious by ML classifiers and ClamAV, and exhibits characteristics of a phishing lure. It contains numerous external links, many hosted on disposable domains, suggesting an attempt to distribute malicious content. The heuristic 'SE_PASSWORD_ARCHIVE_LURE' indicates the document likely provides instructions to decrypt a password-protected archive, a common tactic to bypass security filters.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

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://zajinet.ru/strik?utm_term=rode+videomic+pro+plus+on-camera+shotgun+microphone+review PDF link annotation
    • https://cdn.sqhk.co/wazilisiko/AhbAlXb/jejagovulekezam.pdfIn PDF document text
    • http://fotogodopuxet.iblogger.org/zigulewasokowuza.pdfIn PDF document text
    • http://dewizin.22web.org/sisufowafitexanuje.pdfIn PDF document text
    • http://turistik-a.ru/powerflex_525_user_manual_publication_520com-um001zdlbx.pdfIn PDF document text
    • http://bujenaro.scienceontheweb.net/sobaxapo.pdfIn PDF document text
    • http://tamakar.xyz/al_ruqyah_al_shariahbyg0r.pdfIn PDF document text
    • http://tivuximuliku.mygamesonline.org/one_way_anova_example_problems_with_solutions.pdfIn PDF document text
    • http://bionatur.space/celestron_21036_powerseeker_70az_telescope_review998n1.pdfIn PDF document text
    • http://rajukilodagoje.mygamesonline.org/pdf_to_word_programmatically.pdfIn PDF document text
    • http://fomijegi.mypressonline.com/13848475870.pdfIn PDF document text
    • http://peroruse.iblogger.org/eyeshadow_guide_stickers.pdfIn PDF document text
    • https://cdn.sqhk.co/pumafuki/fje7Jhg/dizirojabuxejum.pdfIn PDF document text
    • https://cdn.sqhk.co/posukomokufi/LjgEhcY/66932568369.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/1215fd0d-bab9-4879-8631-3001f579344b/8749948959.pdfIn PDF document text
    • http://kutelitowolobe.rf.gd/35986670974.pdfIn PDF document text
    • https://b5b764bc-4fc6-48d7-9a4b-423a4d05f225.filesusr.com/ugd/3f2390_beafad9ed7b04aef8ef05ed5abc67186.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/c4f933ab-caa4-4005-a263-5844f029ca1e/how_to_start_my_cyber_security_career.pdfIn PDF document text
    • https://1ebfeea1-7d02-43b8-8f0a-002c87bc7f75.filesusr.com/ugd/50dcf6_d1dc2271060d4b5d809505d88b2e1732.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/9ccaf5df-f9d3-4350-831b-78acf32652f8/which_is_best_microbiology_or_mlt.pdfIn PDF document text
    • https://f495c71d-628d-4070-9a3d-b699cbb46ba4.filesusr.com/ugd/d99ef3_22574d0c3c484a1dbbf35e05c1690e56.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/1dc57bbd-1552-4b21-8f17-e6847909490d/40997337838.pdfIn PDF document text
    • https://d9226533-59f4-4737-ae77-cfa9cdee5378.filesusr.com/ugd/d7c203_00299a5b7e2943d2bc2e52857d0f0e92.pdf?index=trueIn PDF document text
    • http://wepiliga.epizy.com/takeuchi_tb016_workshop_manual.pdfIn PDF document text
    • https://0c3b2bb2-3ac9-4e0e-a0b2-530a831cdf0d.filesusr.com/ugd/23193f_6ac11758d2f249489c2dc9de847d39c4.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00010083.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10083 5676 bytes
SHA-256: 914d7b7af1bc9e0a0b49f3a3e6b1dc89cb9bffac9e53f3167499b95387eaee32
font_01_sfnt_off000113c5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x113C5 13672 bytes
SHA-256: e82458ece06f40fd91192e45bca1becdf191d3fb079af0d4129baddb0e196bea