Malicious PDF — malware analysis report

Static analysis result for SHA-256 3e3e19e322168d0c…

MALICIOUS

PDF

97.5 KB Created: 2021-04-05 04:36:59 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-24
MD5: 474541a2598bc889ac8ed0d5695ec061 SHA-1: ac79f8b68379b0e2f9984409298f1376a8507517 SHA-256: 3e3e19e322168d0cd7396c8e292e765164d671bcd2ab1ca7089d5f9a51973703
186 Risk Score

Malware Insights

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

This PDF file contains a large number of external links, many hosted on disposable domains, suggesting a link farm or phishing attempt. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or malware distribution. The embedded content, though heavily obfuscated, appears to be part of a lure to download a driver.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://bologen.ru/strik?utm_term=sports+hd+dv+sq11+mini+dv+camera+driver+download PDF link annotation
    • http://gunenekaroz.mypressonline.com/anatomy_and_physiology_of_heart_download.pdfIn PDF document text
    • https://vawudida.weebly.com/uploads/1/3/4/8/134890241/4ef57deab996.pdfIn PDF document text
    • https://cdn.sqhk.co/sabumijobude/Jghiar8/cat_bird_game_crowns.pdfIn PDF document text
    • https://cdn.sqhk.co/faroziwe/jdjaOaP/homeroom_classroom_in_spanish.pdfIn PDF document text
    • https://cdn.sqhk.co/wulupumiwi/XxEVm01/global_hero_ship.pdfIn PDF document text
    • http://zinobinipote.22web.org/98398987139.pdfIn PDF document text
    • https://rifodajawu.weebly.com/uploads/1/3/0/7/130739776/5212524.pdfIn PDF document text
    • https://taponoranasigem.weebly.com/uploads/1/3/4/6/134643922/jebubomizate.pdfIn PDF document text
    • https://cdn.sqhk.co/gukawaki/bjaMbjh/city_university_of_hong_kong_postal_code.pdfIn PDF document text
    • https://cdn.sqhk.co/pininipata/6fjjvCB/free_flixster_login.pdfIn PDF document text
    • https://disepijov.weebly.com/uploads/1/3/1/4/131438002/6b52f8d618fe0.pdfIn PDF document text
    • https://cdn.sqhk.co/temududote/dge7zgf/mermaid_photo_booth_props.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://bujijawuta.atwebpages.com/application_letter_for_information_technology_fresh_graduate.pdfIn PDF document text
    • https://88211235-bf86-4d40-a6ec-a052db2f682e.filesusr.com/ugd/94e5ef_770d20465f024460a0fa35b94ac3ef26.pdf?index=trueIn PDF document text
    • http://vivijar.epizy.com/nonutoporu.pdfIn PDF document text
    • http://zotomogizolelaz.rf.gd/60521957552.pdfIn PDF document text
    • https://0c3b2bb2-3ac9-4e0e-a0b2-530a831cdf0d.filesusr.com/ugd/23193f_a3076735dcec47e6b9e2c52492656cac.pdf?index=trueIn PDF document text
    • http://pigepitusedotet.rf.gd/92288771322.pdfIn PDF document text
    • https://de99c131-68bf-4271-bcef-cda292486844.filesusr.com/ugd/f5892c_ea2dec40d59d4984b4a776fc93185bd2.pdf?index=trueIn PDF document text
    • https://3c8d80e7-2998-4b53-b1db-ea2053e4eee2.filesusr.com/ugd/5c8c55_dec2daf0b8274beeb21a92c32cdf659e.pdf?index=trueIn PDF document text
    • https://d650f791-4ca6-4964-96f1-ba9fac0414c1.filesusr.com/ugd/adf9cb_b14af9d2b3f84be5820e5e213adb872a.pdf?index=trueIn PDF document text
    • http://forilojemani.epizy.com/vacuna_antirrabica_humana.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_off00013640.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13640 5744 bytes
SHA-256: 2ae582a2b47a298b1357b40c36ac1de26d69ecea53c73b822abd34c0464435c0
font_01_sfnt_off000149bb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x149BB 14356 bytes
SHA-256: 058a74bdcdde1d7d053136afd6717f2fb810850da64b298cf48997e30f632acc