Malicious PDF — malware analysis report

Static analysis result for SHA-256 ee8182b7062e2673…

MALICIOUS

PDF

88.8 KB Created: 2021-03-10 19:30:49 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-20
MD5: cfb61bd749cfc160be88f397e314c8cf SHA-1: 65d137547ec993e97c527a9d7784cf230b668b83 SHA-256: ee8182b7062e2673e4e39ece3ec02aa094a5c02aefa1dfb05150bd9be123612d
186 Risk Score

Malware Insights

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

The PDF file contains a large number of external links, many of which are hosted on disposable domains or link farms, indicating a malicious intent to manipulate search engine results or redirect users to malicious content. The ClamAV detection and ML classifier strongly suggest maliciousness. While no scripts were explicitly extracted, the PDF structure and link farm heuristics point towards a phishing or SEO-based attack.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9967

Heuristics 6

  • 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 contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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/strik?utm_term=trigonometry+questions+and+answers+pdf+in+hindi PDF link annotation
    • https://wuduzavuvavazi.weebly.com/uploads/1/3/4/6/134618101/lowatuxutonizi.pdfIn PDF document text
    • http://remastacer.com/pelapnndi0.pdfIn PDF document text
    • https://kapavumir.weebly.com/uploads/1/3/5/3/135313873/5870826.pdfIn PDF document text
    • http://xuxelenoxuze.iblogger.org/xuvezonit.pdfIn PDF document text
    • http://insuranceautousa.com/do_all_petsafe_collars_compatiblemykoi.pdfIn PDF document text
    • http://ctuxuu.com/exercice_son_in_ain_ein_ce26hn0l.pdfIn PDF document text
    • https://mumizajasaliso.weebly.com/uploads/1/3/4/5/134598274/64fb34275c6a.pdfIn PDF document text
    • https://wojujasomiselok.weebly.com/uploads/1/3/4/4/134487215/dijezesinuba-sokexi.pdfIn PDF document text
    • https://wogalipa.weebly.com/uploads/1/3/4/3/134316604/mebipiburo_nabumet_fepusojej_fetesu.pdfIn PDF document text
    • https://wimukevefom.weebly.com/uploads/1/3/0/7/130739067/fabababu-moluzupovezav.pdfIn PDF document text
    • https://kasezikibojeg.weebly.com/uploads/1/3/1/8/131871727/batejezifirepino.pdfIn PDF document text
    • https://mopopapepiror.weebly.com/uploads/1/3/2/7/132741339/f1bcf8b160a0.pdfIn PDF document text
    • https://putojedenavaxo.weebly.com/uploads/1/3/2/6/132683165/vomifevukomivagukape.pdfIn PDF document text
    • http://fisusuwisefib.22web.org/calibrate_battery_android_manually.pdfIn PDF document text
    • http://quickstore.pro/195184088295xhjm.pdfIn PDF document text
    • http://julozagoren.22web.org/cursor_for_windows_7.pdfIn PDF document text
    • https://rigavimiba.weebly.com/uploads/1/3/0/8/130814992/wajax.pdfIn PDF document text
    • https://dixapixukezawe.weebly.com/uploads/1/3/5/3/135388261/tatafawud.pdfIn PDF document text
    • http://euroshopmn.space/online_speaking_english_practice_free_app5xflo.pdfIn PDF document text
    • http://takefeduw.iblogger.org/an_officer_and_a_gentleman_1982.pdfIn PDF document text
    • https://livugazenexaru.weebly.com/uploads/1/3/1/6/131607095/xatewinididego-bitudorojose-tagibuzigoxo-bubeguj.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://zenulasomizin.epizy.com/wenibajar.pdfIn PDF document text
    • http://kosejoviwo.epizy.com/outlook_disable_shared_folders.pdfIn PDF document text
    • http://zugugizifozuwor.epizy.com/feluvomakalik.pdfIn PDF document text
    • http://sujawusoxenum.rf.gd/palamudajupipo.pdfIn PDF document text
    • http://petibek.rf.gd/22438722407.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_off00011dac.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11DAC 5692 bytes
SHA-256: 2abce017e2a88bde03d9a6af90436f8be10e6936a36bae514dede8a22108ac2d
font_01_sfnt_off000130f0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x130F0 11024 bytes
SHA-256: 9b7a181fb8391ace95d7ccb273ebb2b748428bfc3a32d55a4f24892c9fab96d6