Malicious PDF — malware analysis report

Static analysis result for SHA-256 9d7d7c9c3c96e893…

MALICIOUS

PDF

83.2 KB Created: 2021-02-26 20:31:07 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-20
MD5: b34017d7781dfd5b32a584dc37bfee47 SHA-1: c48cff65359bffe9e1b3117b1700a7153be038ef SHA-256: 9d7d7c9c3c96e893689cdc3fb45a1821550f170a73ce39f6bb968ed4a8a7fab8
186 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. It contains a large number of external links, many hosted on disposable domains, suggesting a link farm or phishing campaign. The document body is heavily obfuscated, but the presence of external URIs and the link farm heuristic strongly suggest the document's purpose is to redirect users to potentially malicious websites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://dugedepap.ru/123?utm_term=how+do+i+see+where+page+breaks+are+in+word PDF link annotation
    • https://fumuradowije.weebly.com/uploads/1/3/0/7/130739974/c9e7dde216757bc.pdfIn PDF document text
    • https://pipenibeteza.weebly.com/uploads/1/3/4/5/134508730/8044848.pdfIn PDF document text
    • https://cdn.sqhk.co/wowixepis/DjaeQoj/vawesu.pdfIn PDF document text
    • https://cdn.sqhk.co/kopizikob/qjhV0jc/vaxowuledewegezana.pdfIn PDF document text
    • http://drilltech.info/kurokudakifap7j25.pdfIn PDF document text
    • https://cdn.sqhk.co/xederebat/vhf4Cgf/9525763462.pdfIn PDF document text
    • http://peuly.xyz/22318705657j3tyu.pdfIn PDF document text
    • http://xruhdfo.site/67402069735ritta.pdfIn PDF document text
    • https://cdn.sqhk.co/jigavozef/KFfOZha/nfl_network_app_not_working_on_firestick.pdfIn PDF document text
    • https://zolulosix.weebly.com/uploads/1/3/3/9/133986826/7a5907bf4b2b2fc.pdfIn PDF document text
    • http://dipurenirexo.22web.org/pojukuvo.pdfIn PDF document text
    • https://cdn.sqhk.co/zogowefu/6ggjbl3/twisters_ice_cream_palm_coast.pdfIn PDF document text
    • https://liwavijej.weebly.com/uploads/1/3/4/3/134379327/pubirewodox.pdfIn PDF document text
    • https://cdn.sqhk.co/nobukomorur/eKqDgjC/galaxy_bug_space_shooter_3d.pdfIn PDF document text
    • https://cdn.sqhk.co/pakelabete/bx6gijh/jokedilotinetopa.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://zuwewabarabin.epizy.com/brief_information_about_madhya_pradesh.pdfIn PDF document text
    • http://lobidirubegevil.epizy.com/alienware_17_r4_spec_sheet.pdfIn PDF document text
    • http://falalovoxiwada.epizy.com/dutujuwovewewijemo.pdfIn PDF document text
    • http://pevuzimoba.rf.gd/cuales_son_los_alimentos_que_puede_comer_un_diabetico.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_off0000fb38.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFB38 5152 bytes
SHA-256: cd965cf77c7fe59dd4c61d690f427b28636fc27f363e1e8f09eba418631ddcf3
font_01_sfnt_off00010cb5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10CB5 10628 bytes
SHA-256: a2a89dd17d4dee8cb430249f222da4e2e9f36c26514ca9deeff11fa6d10c374e
font_02_sfnt_off000130fe.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x130FE 4324 bytes
SHA-256: b50a2106bf82917db0cd3cf88f63c5e8cc3298b343ace5cffc591b35df33d24c

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