Malicious PDF — malware analysis report

Static analysis result for SHA-256 8936329d8c762f98…

MALICIOUS

PDF

65.5 KB Created: 2021-02-15 16:10:14 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-17
MD5: c2c5c7a1eb5c0d573cafc8d99458d69d SHA-1: f2538c4b5762d1ca02f66bf2cd6b2893e4ebaa14 SHA-256: 8936329d8c762f98e5659e705c3bd24110513d7d84705d2ae8dad0c2b9a36c19
124 Risk Score

Malware Insights

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

The PDF file contains numerous embedded URLs, many of which are hosted on disposable domains and utilize UTM parameters, indicating a phishing or malware distribution attempt. The ML classifier and ClamAV detection strongly suggest malicious intent. While no scripts were explicitly extracted, the PDF structure and embedded links are characteristic of phishing lures designed to redirect users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9127

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
  • 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
  • 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://druttle.ru/strik?utm_term=how+do+you+change+a+truma+water+heater+element PDF link annotation
    • http://lojasamericanasbr.com/bali_tour_driver_and_guidexjpeu.pdfIn PDF document text
    • http://esportzmlevent.com/31613492354c0kok.pdfIn PDF document text
    • http://soul-felt.com/lenatuaqg10.pdfIn PDF document text
    • https://pumutetigowon.weebly.com/uploads/1/3/4/6/134699291/gujukisob-jologerupozipud-vekerapekegojo.pdfIn PDF document text
    • http://table-wait.com/safety_equipment_on_boardufjjg.pdfIn PDF document text
    • https://cdn.sqhk.co/nawakema/CQ2Qjel/best_way_to_get_organic_instagram_followers.pdfIn PDF document text
    • http://center-about.com/24171752276tnqrh.pdfIn PDF document text
    • http://changepass.online/fekakiwugenakojezapuzukij18rsl.pdfIn PDF document text
    • http://remontvorot24.com/gasoline_tank_truck_emergencies_guidelines_and_proceduresp7hb3.pdfIn PDF document text
    • https://dovenokitumenu.weebly.com/uploads/1/3/1/4/131482991/44aa753a850.pdfIn PDF document text
    • https://cdn.sqhk.co/xubulozirod/iihijjj/john_gba_lite_para_iphone.pdfIn PDF document text
    • http://reactivaperu-2020.com/clauses_worksheet_year_60ikf8.pdfIn PDF document text
    • https://levukuwaxumofet.weebly.com/uploads/1/3/1/3/131383949/1f2c10a2.pdfIn PDF document text
    • https://feliwisinawo.weebly.com/uploads/1/3/1/8/131856919/9b7b33dfbe0c72.pdfIn PDF document text
    • http://discovljzg.fun/toni_morrison_paradiseeyzr7.pdfIn PDF document text
    • http://shtancircul.site/556535522912oed.pdfIn PDF document text
    • http://lnstagramservicecopyrights.com/malformaciones_congenitas_del_rion_slidesharex9r2z.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn 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_off0000d1d8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD1D8 5332 bytes
SHA-256: e2eb81db6740d20abe98535d617ecb0222eb0169c3725340e3abfe74c5542bb9
font_01_sfnt_off0000e3e4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE3E4 10252 bytes
SHA-256: 75041af9a55e335af9f79ef4ab22316a537be089c8159be36cfd3c01a0b19475