Malicious PDF — malware analysis report

Static analysis result for SHA-256 5c79618281b17406…

MALICIOUS

PDF

77.8 KB Created: 2021-04-17 13:39:49 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-23
MD5: dfce0f502647bf1c2d58d6eda5edcffa SHA-1: 9f533b70811ed269eccc937d1b46a8655f0a934e SHA-256: 5c79618281b1740678bb0dd8bee29231b5bd4299c312cbc8f1b028ddccf029f6
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 document contains numerous external URIs, with one prominent URL being https://xezojetit.ru/strik?utm_term=queen+piano+sheet+music+amazon, suggesting a phishing or scam attempt. The presence of PDF_SEO_DISPOSABLE_LINK_FARM heuristic further supports the idea that this PDF is part of a link farm designed to redirect users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

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://xezojetit.ru/strik?utm_term=queen+piano+sheet+music+amazon PDF link annotation
    • https://nivuzodix.weebly.com/uploads/1/3/1/4/131410872/4547275.pdfIn PDF document text
    • https://bemujegifa.weebly.com/uploads/1/3/5/3/135312506/vuronisuzap.pdfIn PDF document text
    • http://zodoworusa.22web.org/camus_resistance_rebellion_and_death.pdfIn PDF document text
    • http://xutifufaxe.mypressonline.com/15680061753.pdfIn PDF document text
    • http://fobezevuwoki.iblogger.org/calendario_liturgico_2020_descargar.pdfIn PDF document text
    • https://cdn.sqhk.co/wanadujogo/739qgca/44028804699.pdfIn PDF document text
    • https://buwulikifem.weebly.com/uploads/1/3/4/5/134583505/fuzejanuxewok.pdfIn PDF document text
    • https://cdn.sqhk.co/mepowokugo/jifhdUm/sepufoperogateraxuzisi.pdfIn PDF document text
    • http://sagunutu.medianewsonline.com/1992_ezgo_parts_list.pdfIn PDF document text
    • https://cdn.sqhk.co/viwedanej/gdieieS/befularezorivutagegazat.pdfIn PDF document text
    • http://viniveba.mywebcommunity.org/franchising_slideshare.pdfIn PDF document text
    • https://cdn.sqhk.co/pumopivosoba/PuEEjjI/41011770148.pdfIn PDF document text
    • https://dafozadojav.weebly.com/uploads/1/3/4/7/134764431/solumidofedelof_vatijupavib_dogobitam_zuxonapazovu.pdfIn PDF document text
    • http://kokolonesafu.getenjoyment.net/what_time_to_pray_salatul_istikhara.pdfIn PDF document text
    • http://julivojurukumu.sportsontheweb.net/revesogikedopoxikodafizi.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://rugefar.myartsonline.com/cfa_level_2_alternative_investments.pdfIn PDF document text
    • https://58552d80-c20c-4e4f-99b9-91bedbcc07a3.filesusr.com/ugd/c18496_16ff641695c64b718b31aad3770693ee.pdf?index=trueIn PDF document text
    • http://muvemaxadal.onlinewebshop.net/41458024184.pdfIn PDF document text
    • http://nukivamo.myartsonline.com/how_to_troubleshoot_mini_split_ac.pdfIn PDF document text
    • http://muluwokixo.onlinewebshop.net/95453462857.pdfIn PDF document text
    • http://ludinezew.rf.gd/how_to_attract_your_twin_flame_faster.pdfIn PDF document text
    • https://d9226533-59f4-4737-ae77-cfa9cdee5378.filesusr.com/ugd/d7c203_66b043a2385c4888ab7ac95958d4b4f2.pdf?index=trueIn PDF document text
    • http://jadivepijuga.myartsonline.com/zomatopuzeweloges.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_off0000f19a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF19A 5156 bytes
SHA-256: ceb73dac44acd601a7ab8f55a4068cf12d2450daa57bb179ac6f12aeb44054fe
font_01_sfnt_off0001030b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1030B 11376 bytes
SHA-256: 6376f0985d4622f6abfaec0574381b272b56e48c2f72c919bf558835d8c74fa0