Malicious PDF — malware analysis report

Static analysis result for SHA-256 81292b0697290a50…

MALICIOUS

PDF

73.0 KB Created: 2021-04-18 06:55:00 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-14
MD5: c55bdfd4a58b322be466e85dc1829cca SHA-1: 9a663b019a4c91cc80b3582a705827b6097b479d SHA-256: 81292b0697290a50085913f6e103b1763cb3f97f12f194892dcff9c64ca9dc91
126 Risk Score

Malware Insights

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

The sample is identified as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. The PDF contains numerous embedded URLs, many pointing to disposable domains, suggesting a link farm or phishing lure. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' specifically flags this behavior, indicating the document's purpose is to redirect users to potentially harmful sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 5

  • 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 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=can+i+use+my+phone+as+a+tv+remote+lg PDF link annotation
    • http://hermidkovo.info/tavuzotijiwaamib.pdfIn PDF document text
    • http://fredo.run/39817922859rh4ri.pdfIn PDF document text
    • http://ziduruwekomowob.iblogger.org/cardiogenic_shock_management_guidelines.pdfIn PDF document text
    • http://help-ruleviolation.com/prefix_suffix_rootnxdnt.pdfIn PDF document text
    • https://cdn.sqhk.co/baxafapunubi/uStBajd/vcf_viewer_filehippo.pdfIn PDF document text
    • https://cdn.sqhk.co/jefapukawore/63hcphb/city_builder_road_construction_mod_apk.pdfIn PDF document text
    • https://cdn.sqhk.co/xuvomuvugu/Hjbgehd/wonderchef_vegetable_chopper_reviews.pdfIn PDF document text
    • http://gouliwer.online/ritutepamofegejaxu30kie.pdfIn PDF document text
    • http://discount50.pro/418473012517gz71.pdfIn PDF document text
    • http://forkidsshop.online/what_does_a_moca_score_of_13_meandb7s4.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/bokelur/ek_chumma_song_housefull_4_bestwap.pdfIn PDF document text
    • http://kenabemaborok.rf.gd/toyota_2020_camry_price.pdfIn PDF document text
    • https://s3.amazonaws.com/zugutixe/sap_bo_crystal_reports_tutorial.pdfIn PDF document text
    • https://s3.amazonaws.com/sizabo/video_the_bangles_eternal_flame.pdfIn PDF document text
    • http://dasilumenuf.rf.gd/videoder_beta_video.pdfIn PDF document text
    • http://luwaxilozaraxo.rf.gd/73600944571.pdfIn PDF document text
    • http://lovupitofenux.rf.gd/66382609906.pdfIn PDF document text
    • https://s3.amazonaws.com/xomudufe/28777445432.pdfIn PDF document text
    • https://s3.amazonaws.com/fidobakipivogit/project_x_vs_extended_cut.pdfIn PDF document text
    • https://s3.amazonaws.com/fukezavazuj/pantangi_o_pambalana_worksheet_grade_1.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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000dd8b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDD8B 5300 bytes
SHA-256: 9ffc6b06dbe43b323402ad58a08bb0d34be34a498c81f1005732e5f4a7080c2c
font_01_sfnt_off0000ef75.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEF75 11704 bytes
SHA-256: 7073be4390092740b09f30a5928bb52fe1bb0949d984d209f74b194d186c050b

Open this report in the interactive analyzer, or submit your own file for analysis.