Malicious PDF — malware analysis report

Static analysis result for SHA-256 7edbf10e82537684…

MALICIOUS

PDF

92.9 KB Created: 2021-04-29 16:19:52 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-20
MD5: 1b2c153549655ddcbd84f17e94552819 SHA-1: b5430d9d6159305551cd16b9b35f39ab9a73f532 SHA-256: 7edbf10e82537684dae5641884b7f8db4840a13fe9a3a62ccaf8f2e3c5886009
126 Risk Score

Malware Insights

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

The PDF file contains numerous external links, many pointing to disposable domains, and is flagged by ML classifiers and ClamAV as malicious phishing content. The embedded URLs, such as 'https://xezojetit.ru/strik?utm_term=how+to+make+a+digital+tv+converter+box', are designed to redirect users to potentially harmful sites. The presence of external URIs and link farm heuristics strongly suggests a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9989

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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=how+to+make+a+digital+tv+converter+box PDF link annotation
    • https://xufudigu.weebly.com/uploads/1/3/4/5/134515134/6024825.pdfIn PDF document text
    • http://rubeatyshop.xyz/18306570147hhhsg.pdfIn PDF document text
    • http://telovajov.medianewsonline.com/blaupunkt_tokyo_110_manual.pdfIn PDF document text
    • http://gatorama.space/virus_rubellab6o7y.pdfIn PDF document text
    • https://vegekonewipure.weebly.com/uploads/1/3/5/9/135964828/bodusevod-zakopufanegatum-gazowojabax.pdfIn PDF document text
    • http://topuxuwuvalam.iblogger.org/73968599450.pdfIn PDF document text
    • http://dabinepoj.mygamesonline.org/allure_of_the_seas_restaurants.pdfIn PDF document text
    • http://static-start.top/ghost_in_the_shell_artbookj8ne8.pdfIn PDF document text
    • http://niwagiw.22web.org/latest_caller_ringtone_free.pdfIn PDF document text
    • https://kukutapiroboj.weebly.com/uploads/1/3/4/7/134712573/2945043.pdfIn PDF document text
    • http://rabota-plus.club/crusades_worksheet_and_map_activity_answers3ts2v.pdfIn PDF document text
    • http://nipizakevenuvis.scienceontheweb.net/93890833675.pdfIn PDF document text
    • http://bluebadgeapproval.com/is_mathematical_logic_hardx6bnt.pdfIn PDF document text
    • http://kupivse.xyz/nuvuginipekalixokiduseuahnz.pdfIn PDF document text
    • http://wosozage.mypressonline.com/what_does_weather_symbols_mean.pdfIn PDF document text
    • https://safusugefivelu.weebly.com/uploads/1/3/4/3/134346528/kuzuvujipuzozegavutu.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://fuvusujalujule.epizy.com/nelekawiwoxekasatarane.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/744b5d47-5bdb-4c28-aba2-986063512fb1/17999575577.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/95844be9-9bbf-4c3a-8052-3e0cbb5135ff/hp_photosmart_5510_scan_to_computer_software_mac.pdfIn PDF document text
    • http://guneginumo.rf.gd/40028617949.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d3a467b2-d2c9-440d-9081-d4a516e2f16a/42894005085.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/183b5b55-31b1-4542-9ee0-6d5e463b1676/94858525135.pdfIn PDF document text
    • http://dibulazovila.rf.gd/zemita.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00011ebe.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11EBE 5256 bytes
SHA-256: 8e784dc1a406b03a8ca792273cd5bc106b3094b06d7b9f0a52f89c764fabe8f3
font_01_sfnt_off00013097.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13097 11488 bytes
SHA-256: fec0956a867af3ef173f77a51eeb90dd04cbeac4211fb66ba409978027b53a41
font_02_sfnt_off0001577c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1577C 4324 bytes
SHA-256: 05d2457133b820fa77aa358e30e9acfbad3f04c46ced9a37296d9311117db176