Malicious PDF — malware analysis report

Static analysis result for SHA-256 26ca498570d26974…

MALICIOUS

PDF

79.6 KB Created: 2021-03-24 10:21:43 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-23
MD5: c71b173723efd824848d8ae57b30faef SHA-1: a54912fcfed68abe79dc6473df389effcef97603 SHA-256: 26ca498570d2697482df67887c61243261a54a48dd4c19391cdb758d63409aa3
126 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, with one prominent URL pointing to 'lozipotod.ru' which is flagged as suspicious. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' indicates the PDF is part of a link farm on disposable hosting, suggesting a malicious intent to distribute or phish. The ML classifier and ClamAV detection strongly indicate maliciousness, likely related to phishing or malware delivery via the embedded links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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://lozipotod.ru/strik?utm_term=how+to+see+battery+percentage+on+ti+84+plus+ce PDF link annotation
    • https://zuripuwa.weebly.com/uploads/1/3/2/7/132740693/23f98d73c41d16.pdfIn PDF document text
    • http://ctyr.ru/bloons_td_battles_hack_2020eqcai.pdfIn PDF document text
    • http://fepegabilufe.iblogger.org/what_is_software_testing_life_cyclestlc_briefly_explain.pdfIn PDF document text
    • http://trysoda.pro/font_logo_design_free_onliner5ur3.pdfIn PDF document text
    • https://putevafim.weebly.com/uploads/1/3/4/8/134881436/b6e1e08250d7.pdfIn PDF document text
    • http://madokedaxemosu.22web.org/4153188146.pdfIn PDF document text
    • https://bufasijo.weebly.com/uploads/1/3/2/7/132740378/6685202.pdfIn PDF document text
    • https://kikosezuzo.weebly.com/uploads/1/3/1/3/131378972/zarosusasugejuk_jetibiris_damor.pdfIn PDF document text
    • http://bawoputameded.iblogger.org/why_do_i_hate_school_work.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://juzefabamurever.rf.gd/lirowebovasirufizi.pdfIn PDF document text
    • http://pirigebosagome.rf.gd/cardiologia_nuclear.pdfIn PDF document text
    • http://bolozenafo.rf.gd/propresenter_6_multiple_outputs.pdfIn PDF document text
    • http://zawanaxakav.epizy.com/english_dictionary_download.pdfIn PDF document text
    • http://vibupozikijebi.rf.gd/74942510081.pdfIn PDF document text
    • http://vulikoviluxugu.rf.gd/kingdom_come_two_crowns_guide.pdfIn PDF document text
    • http://vetuvadoxawiton.epizy.com/tipos_de_sistemas_operativos_web_y_mviles.pdfIn PDF document text
    • http://tudozujuxijoz.rf.gd/71047516726.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000def3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDEF3 2900 bytes
SHA-256: 40ce0bc9b113ef031639604f059b60aa9f1e41b097d60e75bfbf620cccc66306
font_01_sfnt_off0000e937.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE937 5560 bytes
SHA-256: 78ee670f931e33f0271f788be59c6bded336c25fba45ed3ba7b26596737ad804
font_02_sfnt_off0000fc45.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFC45 11104 bytes
SHA-256: 05ca8ec8852414abbd4163f30c587cc5eef195234d1927f97581402657215259
font_03_sfnt_off0001225a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1225A 4324 bytes
SHA-256: b50a2106bf82917db0cd3cf88f63c5e8cc3298b343ace5cffc591b35df33d24c