Malicious PDF — malware analysis report

Static analysis result for SHA-256 2096e883480bb8e7…

MALICIOUS

PDF

89.2 KB Created: 2021-05-10 02:17:47 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: 8f596cbc4e9f02cc1813e639a90a7629 SHA-1: 9f30c9ba300ae25925618a05cec03f50ad567cf6 SHA-256: 2096e883480bb8e77a727ed1da0eb14b9318522317cfca57cf1b090a4cae2c73
134 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. It uses an invoice-themed lure. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

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 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.
  • Fake invoice / payment lure low SE_INVOICE_LURE
    Document contains invoice or payment language paired with an action verb — useful context when combined with link, macro, or attachment indicators
  • 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://xezojetit.ru/strik?utm_term=how+to+sue+opposing+lawyer+for+misconduct PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4449622/normal_6011b7275f6df.pdfIn PDF document text
    • https://cdn.sqhk.co/fotajoge/fjavicK/jogajuvafopajubos.pdfIn PDF document text
    • http://kakifoliwifeja.iblogger.org/kuxafubufog.pdfIn PDF document text
    • http://bukupiduge.mypressonline.com/ketapefesaget.pdfIn PDF document text
    • https://cdn.sqhk.co/tikalamin/hdxxhaV/31829873049.pdfIn PDF document text
    • https://cdn.sqhk.co/sozodumupof/iQF7Lgd/cach_hack_jurassic_world_2019_ios.pdfIn PDF document text
    • http://forajadafogaxuv.medianewsonline.com/ck_prahalad_fortune_at_the_bottom_of_the_pyramid.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4485930/normal_602f16f0d4ecf.pdfIn PDF document text
    • https://cdn.sqhk.co/lanumakefu/0ITDY9e/55040181697.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
    • https://uploads.strikinglycdn.com/files/96bd52ed-7db2-4e95-adf4-969927eb45eb/wovelumojukukup.pdfIn PDF document text
    • http://xakazasaravi.onlinewebshop.net/41881577808.pdfIn PDF document text
    • http://sazebufaz.atwebpages.com/32588225362.pdfIn PDF document text
    • http://vegexiwijije.rf.gd/movie_english_babu_desi_mem.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/110eb5e7-15fe-4fd8-81d5-f4914bec80c1/stihl_56hl_petrol_long_reach_hedge_trimmer.pdfIn PDF document text
    • http://tizexazebubo.atwebpages.com/96045156056.pdfIn PDF document text
    • http://wivaxodi.onlinewebshop.net/police_self_defense_techniques.pdfIn PDF document text
    • http://rixibedi.onlinewebshop.net/biwefinezizefulofal.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/eaba2099-29e0-45e1-aa9f-e6a6a9b46e1f/2020_julian_date.pdfIn PDF document text
    • http://tarepos.onlinewebshop.net/homelite_3100_psi_pressure_washer_troubleshooting.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_off000110ef.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x110EF 5512 bytes
SHA-256: c31c4629f162e5a4350db439141cc57cbf671384b3f5f84d6f8bff60ce0be99d
font_01_sfnt_off000123a9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x123A9 11088 bytes
SHA-256: 12b572d5fc5af5932fdf2f06ab7becdf5eda4612083bb3c2614d07f30348f06d
font_02_sfnt_off00014988.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14988 4324 bytes
SHA-256: cd94ef65598b1866d0653cdd88243d989fd81359c0e770c2d3a4858f1c2f6d34

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