Malicious PDF — malware analysis report

Static analysis result for SHA-256 d06684bf2613a56b…

MALICIOUS

PDF

73.9 KB Created: 2021-02-24 19:37:16 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-26
MD5: 58635494149442e93ecbebafef9c2944 SHA-1: d60472d83db20e0bd9f53554de172d2c69d4da85 SHA-256: d06684bf2613a56b312be73e50f8219157a49e2b5f9479e67733dc6cff5dc732
126 Risk Score

Malware Insights

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

The PDF file was detected as malicious by ML classifiers and ClamAV, indicating a phishing or trojan payload. It contains numerous embedded URLs pointing to disposable domains, suggesting a link farm designed to obscure the ultimate malicious destination. The document body, though heavily obfuscated, contains keywords related to downloads, reinforcing the lure.

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://druttle.ru/wix?keyword=insanity+workout+download+videos PDF link annotation
    • http://free-at.pro/solar_system_facts_nasaogqyy.pdfIn PDF document text
    • http://gufopitasuwo.22web.org/u_form_meaning_in_tamil.pdfIn PDF document text
    • http://wewogokuwidu.mywebcommunity.org/muzawoxibisipuboxaxusop.pdfIn PDF document text
    • http://zobotalemogi.sportsontheweb.net/303_squadron_battle_of_britain_free_download.pdfIn PDF document text
    • http://resimpub.com/how_to_pair_jaybird_freedom_2be89e.pdfIn PDF document text
    • http://viniveba.mywebcommunity.org/sijeweviraj.pdfIn PDF document text
    • http://wapividazofar.scienceontheweb.net/boy_scouts_of_america_v._dale_case_brief.pdfIn PDF document text
    • http://usene.xyz/united_colors_of_benetton_meaning_in_hindie3zg8.pdfIn PDF document text
    • http://believes.space/butevijotoxe4c10z.pdfIn PDF document text
    • http://theandyhong.com/19147779398dstpu.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://vumazudu.rf.gd/symantec_dlp_incident_reporting_api.pdfIn PDF document text
    • http://bimogudi.rf.gd/st_andrews_university_logo.pdfIn PDF document text
    • http://lavemob.epizy.com/41991936523.pdfIn PDF document text
    • http://xevunikusixed.rf.gd/74495787513.pdfIn PDF document text
    • http://dizoran.epizy.com/control_system_design_guide_4th_edition.pdfIn PDF document text
    • http://vejegaba.atwebpages.com/tagumonibos.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_off0000e37d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE37D 5072 bytes
SHA-256: 65200562341f3397da47213ba633a5a91e1535ceb542539663bac699bf22ee0f
font_01_sfnt_off0000f4e9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF4E9 11084 bytes
SHA-256: d952795e047d4939e3175b6acc0ae76b3f4d4f0a556cf1e8bdae2e1fe7e759cc