Malicious PDF — malware analysis report

Static analysis result for SHA-256 78a00a26aff0da17…

MALICIOUS

PDF

69.6 KB Created: 2021-02-28 08:27:07 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-10
MD5: 0914f60f09461d019a5983b5f4f13665 SHA-1: cc3e1ac91f35465edc262b42fb84b039be574913 SHA-256: 78a00a26aff0da17fda9894185f70634a42faba024cc48515af46406cb3b9151
126 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs pointing to various domains, many of which are associated with link farms and potentially malicious content. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or distributing further malware. While no scripts were explicitly extracted, the PDF structure and embedded links suggest an attempt to redirect users to compromised or malicious sites.

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://seumenha.ru/wix?keyword=straight+razor+sharpening+stone+grit PDF link annotation
    • https://cdn.sqhk.co/xovatagemi/j8EUhvL/60389560868.pdfIn PDF document text
    • https://cdn.sqhk.co/nananava/bvJFjig/2_carat_solitaire_diamond_ring_princess_cut.pdfIn PDF document text
    • http://useplafond.xyz/bronchi_definitionmu5jr.pdfIn PDF document text
    • http://falanog.iblogger.org/teledogutuwadewizatikuge.pdfIn PDF document text
    • http://daliadiago.com/tokojedaviriretuswnkw4.pdfIn PDF document text
    • https://cdn.sqhk.co/xujurovemu/jhtjbMB/thronebreaker_switch_physical.pdfIn PDF document text
    • http://viniveba.mywebcommunity.org/99877593820.pdfIn PDF document text
    • http://weinmvc.net/banana_boat_song_piano_sheet_musico2se8.pdfIn PDF document text
    • https://cdn.sqhk.co/gibuzini/2ziflhc/celcom_pulse_apk.pdfIn PDF document text
    • http://tublitalia.space/46375507072iiu17.pdfIn PDF document text
    • http://peluxuba.sportsontheweb.net/57299106075.pdfIn PDF document text
    • http://ukranews.site/history_of_western_music_10th_editionlf6re.pdfIn PDF document text
    • http://vovality.club/wordpress_cms_website_templates_freenb576.pdfIn PDF document text
    • https://cdn.sqhk.co/tunuviju/igdt3gf/zezadikas.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://kepofif.onlinewebshop.net/ethical_hacking_tutorial_free.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_off0000d1fd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD1FD 5200 bytes
SHA-256: d47776f3d2e561c8730fffda9ec68cfb3d0e360f651ff0d907c24b70546e4f97
font_01_sfnt_off0000e3b2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE3B2 10656 bytes
SHA-256: ba52098e8bae873dd84bd2c047d9e1e33e0613fc13d166f92bd1f22bf6febc24

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