Malicious PDF — malware analysis report

Static analysis result for SHA-256 8f1ad5ebc3658a83…

MALICIOUS

PDF

68.0 KB Created: 2021-04-25 06:51:21 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 7d5c455eeef1478aa890c2926e08007e SHA-1: 79c9a9a592058a35508db4105477671c5b27a1cd SHA-256: 8f1ad5ebc3658a833453f0b73a516c83d5ab6dba007ced9541f6e69229ea4f68
96 Risk Score

Malware Insights

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

The PDF contains an embedded URI pointing to a suspicious domain, identified by ClamAV as Pdf.Phishing.Trojan. The ML classifier also strongly flagged this PDF as malicious. While no scripts were extracted, the presence of external URIs suggests an attempt to redirect the user to a malicious site, likely for phishing or to download further payloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 4

  • 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://midufefew.ru/strik?utm_term=lax+max+new+generation+bluetooth+headphones
    • http://prognoz-football.club/65450374785588as.pdf
    • https://cdn.sqhk.co/powirafawume/dkH9cjh/game_of_sultans_vip_9_cost.pdf
    • https://cdn-cms.f-static.net/uploads/4380082/normal_60468e53b8ca5.pdf
    • http://trixy-matrix.space/la_metamorfosis_de_franz_kafka_reseaabmxu.pdf
    • https://cdn.sqhk.co/nijodujex/gec88C4/elune_and_the_winter_queen.pdf
    • https://cdn.sqhk.co/noviraxat/giY9ib0/vadojikodibazinok.pdf
    • http://fulesiv.22web.org/writing_a_business_plan_example.pdf
    • https://cdn.sqhk.co/vadavenaw/R81jfjf/josepemamotadu.pdf
    • https://cdn.sqhk.co/pininipata/iiYe2ij/alto_s_adventure_free_for_iphone.pdf
    • http://fastpysystem.online/python_for_beginners_book8f5f3.pdf
    • https://cdn.sqhk.co/mugolino/cv6Ghg8/aaron_s_department_login.pdf
    • http://gedagefi.22web.org/jira_assignee_history_report.pdf
    • https://static.s123-cdn-static.com/uploads/4454822/normal_5feb9899602e1.pdf
    • https://static.s123-cdn-static.com/uploads/4420235/normal_60068d702e5b0.pdf
    • https://cdn-cms.f-static.net/uploads/4443598/normal_6013a1df6d7d7.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://uploads.strikinglycdn.com/files/e6f7d528-b2df-4ba5-93e4-0e627d5dada3/piriformis_exercises_to_strengthen_back.pdf
    • https://uploads.strikinglycdn.com/files/1d9c015e-dfe0-4374-9b3c-8bc2d715d740/sample_behavior_intervention_plan_for_physical_aggression.pdf
    • https://uploads.strikinglycdn.com/files/9ae92ae2-9377-41c3-9aaa-3ab97fb53938/data_science_and_big_data_analytics_discovering_analyzing_visualizing_and_presenting_data.pdf
    • http://dukiduzafenej.epizy.com/63675956395.pdf
    • 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_off0000caf2.bin
7759d21458bd8ce07f9a415218c6ed9a11f66b74449d0253721e5506431dfb62
pdf-font-stream PDF embedded font (sfnt) at offset 0xCAF2 5616 bytes
font_01_sfnt_off0000ddf4.bin
c58c29c0923ff86f1daca6243a1fde9032ee9128c34e2d652c22c167cfd000c6
pdf-font-stream PDF embedded font (sfnt) at offset 0xDDF4 10892 bytes