Malicious PDF — malware analysis report

Static analysis result for SHA-256 0ef9c283df068e65…

MALICIOUS

PDF

79.9 KB Created: 2021-03-15 14:20:50 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-20
MD5: 23f708b696c0848130272caf3bda6c43 SHA-1: 5bbc3ccc334e4d7b6ad98beda7eb23c97628acbd SHA-256: 0ef9c283df068e6567a6e491177db2b448719fb89c342d30f4de4c93c0d9aa34
186 Risk Score

Malware Insights

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

This PDF file exhibits characteristics of a phishing or malware distribution lure, as indicated by the 'PDF_SEO_LINK_FARM' and 'PDF_SEO_DISPOSABLE_LINK_FARM' heuristics. It contains a large number of external links, many pointing to disposable hosting, suggesting an attempt to redirect users to malicious content. The ML classifier and ClamAV detection further support its malicious nature, with ClamAV identifying it as 'Pdf.Phishing.Trojan'. No scripts were extracted, but the embedded URLs are the primary indicators of malicious activity.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9992

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://lozipotod.ru/award?keyword=california+pizza+kitchen+nutrition+pdf PDF link annotation
    • http://nipizakevenuvis.scienceontheweb.net/jukexabesasuvuveropun.pdfIn PDF document text
    • https://cdn.sqhk.co/jomububorava/6zw8X98/tie_dye_shirts_diy_spiral.pdfIn PDF document text
    • https://cdn.sqhk.co/dosakupu/fNDgdib/offline_icon_converter_software.pdfIn PDF document text
    • http://videohost.space/how_do_you_write_a_book_title_in_mla_formatxlgtc.pdfIn PDF document text
    • https://rukinedofixod.weebly.com/uploads/1/3/4/3/134348838/ded4e7.pdfIn PDF document text
    • https://nuvawusop.weebly.com/uploads/1/3/5/3/135302159/245828def52708.pdfIn PDF document text
    • http://gloslides.com/dazewufkljy.pdfIn PDF document text
    • https://cdn.sqhk.co/sojetaji/ghhaYge/cnc_programming_app_free_software_download.pdfIn PDF document text
    • http://loveantravel.xyz/how_to_patch_xforce_keygenlg09j.pdfIn PDF document text
    • http://dilawiputonu.mypressonline.com/kenmore_high_efficiency_washer_and_dryer.pdfIn PDF document text
    • https://cdn.sqhk.co/dasadogiso/hiBghij/wood_cutting_saw_lowes.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369802/normal_603bf357eaa21.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4451742/normal_6022e5d44464b.pdfIn PDF document text
    • http://merexazumebenag.medianewsonline.com/xibelojetalakarediziduzab.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4420747/normal_60239e6731a62.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4378404/normal_5ff5beb70a9f8.pdfIn PDF document text
    • https://cdn.sqhk.co/sebutarukaw/jgia207/5955209451.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://d99d9bf7-a5e0-49f2-90ac-0d1bc881463d.filesusr.com/ugd/0182ef_05ffda1b92d142739c628aebc1afab28.pdf?index=trueIn PDF document text
    • https://153f2bed-3501-4ec5-9468-ed1987511f6d.filesusr.com/ugd/f67134_9e037ab2a0314bfba781ca5588f133e6.pdf?index=trueIn PDF document text
    • https://a12a05ab-6462-4855-b086-b0a2a961d6d8.filesusr.com/ugd/2c76f4_27db86d2a4b4405fbe48109602a8a8c3.pdf?index=trueIn PDF document text
    • http://purewowesajumu.myartsonline.com/51905026296.pdfIn PDF document text
    • https://460eb545-5389-4aa9-9e78-d1074a8bca0c.filesusr.com/ugd/21a131_b082cb01e9624d80bd2a2621b398ca1a.pdf?index=trueIn PDF document text
    • https://ad858f6a-7bbb-416d-9365-e04d7986ed9b.filesusr.com/ugd/3c9ac1_9559131721504c97862e0d6472119c98.pdf?index=trueIn 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_off0000fbc2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFBC2 5084 bytes
SHA-256: 80cc37a38774b4a05c2eb4c82658bb31e10d0a969fbbf5b4eb6b613a6fdc1780
font_01_sfnt_off00010d10.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10D10 11056 bytes
SHA-256: 0a41169c6f693bcff5a05d46659c4025ab2f77afd387b4e6d8c3ecaeb2ab6a7f