Malicious PDF — malware analysis report

Static analysis result for SHA-256 ab1585036240515d…

MALICIOUS

PDF

79.9 KB Created: 2021-04-05 19:10:04 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-13
MD5: 9855ae31defef30984f189c64c260654 SHA-1: 4521677a1aa138f3a1b690308d8b44a9007de795 SHA-256: ab1585036240515d9b9fff7ae4ea2bf689da01f8016a3b866bae6f9d4c4ff29f
126 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 malicious intent. The presence of numerous embedded URIs, such as 'https://soxebez.ru/award?keyword=bastien+s+beginning+piano+for+adults+pdf', suggests a phishing or malware distribution campaign. The file's structure and the high number of external links point towards a link farm used to obscure the final malicious destination.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://soxebez.ru/award?keyword=bastien+s+beginning+piano+for+adults+pdf PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4476756/normal_5fc5cbde1216c.pdfIn PDF document text
    • https://tabofeluraratub.weebly.com/uploads/1/3/1/4/131438776/basazopujep.pdfIn PDF document text
    • http://moymagazin.xyz/mi424wr-gen3i_port_forwardingivp5c.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4501791/normal_5ff846d571081.pdfIn PDF document text
    • https://nulenedo.weebly.com/uploads/1/3/6/0/136084055/judanilopese-gelizinasuxos.pdfIn PDF document text
    • https://xetutimi.weebly.com/uploads/1/3/0/9/130968997/46858a9aef6.pdfIn PDF document text
    • https://cdn.sqhk.co/gorokipo/kxF1haY/rebit.pdfIn PDF document text
    • http://ninuwekevap.scienceontheweb.net/alan_moorehead_gallipoli.pdfIn PDF document text
    • http://xbet1.fun/what_materials_do_i_need_for_cricut_makervfznw.pdfIn PDF document text
    • http://opros.xyz/convertidor_de_milesimas_de_pulgada_a_mmzgrp6.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4401525/normal_5fe941c4f3c50.pdfIn PDF document text
    • https://kolojadulosa.weebly.com/uploads/1/3/1/3/131397946/12f74.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4367313/normal_5ff77b513809a.pdfIn PDF document text
    • http://fezanabuxa.22web.org/nigirudutexurupol.pdfIn PDF document text
    • https://cdn.sqhk.co/pegipoveridi/mgfgjhj/gas_prices_in_california_over_the_years.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://jamebixidi.rf.gd/annadata_bengali_songs.pdfIn PDF document text
    • http://diwozonez.epizy.com/is_my_drivers_license_suspended_colorado.pdfIn PDF document text
    • http://mumidukegex.rf.gd/pocket_juice_hybrid_heat_portable_charger_and_hand_warmer_reviews.pdfIn PDF document text
    • http://fanalejowegop.atwebpages.com/zumabijasogoboguxeku.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_off0000eb69.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEB69 5280 bytes
SHA-256: b18bd6b688cf4eb1b84ab0a3fba3a0cab6cd59f92616e2cd0233680e79d2557f
font_01_sfnt_off0000fd57.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFD57 11288 bytes
SHA-256: 0d98dd1bd2989c01000f09d30421f5f292e5e6f103bab208519a755afe57d27c
font_02_sfnt_off000123eb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x123EB 4324 bytes
SHA-256: 1062cd8ddf90f4344fa193b395386d5669df1a952e5759311ca261a71931f361

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