Malicious PDF — malware analysis report

Static analysis result for SHA-256 751538e5fef688ff…

MALICIOUS

PDF

154.2 KB Created: 2021-03-16 05:55:26 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-02
MD5: 3e44f9642ee15242912f9bd4c43c7568 SHA-1: 13b2966dcbb85520491c8adfb631d4fbd01e15cb SHA-256: 751538e5fef688ff7a700fcf4693f6acf41fd87d6de543e38e54c9775b196e2b
126 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' suggests the document is a link farm hosted on disposable domains, with 30 embedded links pointing to 12 distinct hosts. The primary IOC is the URL 'https://ponafet.ru/wix?keyword=bushnell+scout+dx+1000+arc+instruction+manual', which is likely used to redirect users to malicious content. No scripts were extracted, but the presence of numerous external links strongly suggests a phishing or malware distribution campaign.

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://ponafet.ru/wix?keyword=bushnell+scout+dx+1000+arc+instruction+manual PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4422377/normal_5fcd14858fbd3.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4374978/normal_604def2a0aff0.pdfIn PDF document text
    • http://nusukopov.22web.org/antepartum_haemorrhage_ppt.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4408321/normal_604113eeb55e2.pdfIn PDF document text
    • https://sifavebizibi.weebly.com/uploads/1/3/4/0/134040704/lasetevasom-jagerul.pdfIn PDF document text
    • http://kivolugog.mypressonline.com/48279408440.pdfIn PDF document text
    • http://rexevivejegox.scienceontheweb.net/how_to_invest_in_stock_market_philippines_2021.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4488316/normal_604ca16f40a7d.pdfIn PDF document text
    • https://zibiwatogotoz.weebly.com/uploads/1/3/1/1/131163514/551120ed3fa18.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://lupipabibokaf.rf.gd/how_to_draw_guidelines_in_photoshop.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/114b14f2-72a5-4874-b571-60b04e8d9c8f/how_did_the_big_black_guy_from_green_mile_died.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6d887068-e9ab-4de0-a51c-65adebeb0c0d/2002_ford_explorer_factory_rims_for_sale.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/fa5dfe5a-48f1-4bf0-b9c1-7e93e39ca04f/motorola_talkabout_t200_manual.pdfIn PDF document text
    • http://mobosefevexaxep.rf.gd/how_long_do_water_softeners_last_in_arizona.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/043656b2-4ca3-416c-98d9-dcf6b10fdaa5/ending_the_maze_runner_1.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ebfc0200-7549-49d6-b739-0566a6dce42a/15161315152.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3a7a7c39-cc0f-4adc-a446-d2d33e5a3259/lateral_thinking_riddles_for_adults.pdfIn PDF document text
    • http://zugotival.epizy.com/misejiwazobabexurazeme.pdfIn PDF document text
    • http://velawomonoxejuz.epizy.com/potential_barrier_in_quantum_mechanics.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/bfacb456-5c49-4162-bc5f-9a9328219e3a/culture_means_of_production.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000216ee.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x216EE 5488 bytes
SHA-256: b1dc075fcdaa9ce290d9fad5b8685f1e901eb6f1feb9430691241c182e5d36d8
font_01_sfnt_off00022978.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x22978 16688 bytes
SHA-256: 5503caf9365ca37f687ca91e92191cde39ccea1a9ed61d2ab2d5e2708aadcfe7

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