Malicious PDF — malware analysis report

Static analysis result for SHA-256 6a22e1ef44b1fbef…

MALICIOUS

PDF

117.0 KB Created: 2021-04-03 03:55:54 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-16
MD5: 6f6cabdced37435da4970ca75ba7906b SHA-1: e966c1479d3b821fc9d5e47378f7cb2687e72895 SHA-256: 6a22e1ef44b1fbef0d17ddef72d44f561a4db2ce974135bc9701159c1cf9c5a5
126 Risk Score

Malware Insights

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

The PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains numerous embedded URLs, many pointing to disposable hosting, and the document body suggests a lure related to popular search queries. The presence of external URIs and link farm heuristics strongly suggests the document is designed to redirect users to potentially harmful websites for phishing or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://resalured.ru/strik?utm_term=did+elena+and+damon+get+married+season+8 PDF link annotation
    • http://voiprormul.xyz/aristotle_book_2qeq5j.pdfIn PDF document text
    • https://cdn.sqhk.co/zoluxoni/ZcS8kjc/79718128575.pdfIn PDF document text
    • https://cdn.sqhk.co/jovuvufoxet/h9z8CKB/96347485829.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4446765/normal_60491585d7461.pdfIn PDF document text
    • http://smartcoin.design/traductor_ingles_y_espaol_gratiskflc9.pdfIn PDF document text
    • http://biweekamnf.com/mine_bitcoin_on_android_2019gmec2.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4370530/normal_5fde4feb96e54.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4425484/normal_6064f8fd356dd.pdfIn PDF document text
    • http://witikotuxigere.scienceontheweb.net/spider_man_comics_online_free_download.pdfIn PDF document text
    • http://1xbet-regi.site/are_krispy_kreme_donuts_bad_for_youbmqle.pdfIn PDF document text
    • https://cdn.sqhk.co/dodamewope/ijb1Mif/gutofobitiweboxuwabijaki.pdfIn PDF document text
    • http://pimesizawox.sportsontheweb.net/brother_mfc-8710dw_drum_replacement.pdfIn PDF document text
    • http://heretythere.site/tulukaxelibivufolekaxcz9b8.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://pisonepegosa.myartsonline.com/biblical_hebrew_verbs.pdfIn PDF document text
    • http://xekazaz.myartsonline.com/what_are_the_types_of_resistance_exercises.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7be59374-ff31-4c33-a198-f478cf533576/fosotovi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/142e2295-6b54-4ee9-b0bf-6ea5b4b59cf4/deleruje.pdfIn PDF document text
    • http://xosujotuv.rf.gd/brushless_ac_generator.pdfIn PDF document text
    • http://gujodupilewibo.epizy.com/taxevujoliwimifovarudera.pdfIn PDF document text
    • http://robopawize.epizy.com/coloring_sheets_kindergarten_halloween.pdfIn PDF document text
    • http://kasanuvuwa.epizy.com/important_current_affairs_of_february_2020.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_off00018f51.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x18F51 5340 bytes
SHA-256: 5b9cc9cb5f9e847fe6cf6c63f17470b0f4158c7dd1d9cebc3bc8e79c60ac6d5b
font_01_sfnt_off0001a162.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1A162 11188 bytes
SHA-256: b977cd58ab601999b21d11af5303fe98e666332466124218262c2db272c5e339

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