Malicious PDF — malware analysis report

Static analysis result for SHA-256 26ba3d89c65002ad…

MALICIOUS

PDF

69.7 KB Created: 2021-03-20 07:51:19 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-25
MD5: 8fcf5d460d5d39c113b537339a176259 SHA-1: 2858a1c3a6daddda0be07e83e26e396b573e3414 SHA-256: 26ba3d89c65002ad2796f264771f07c5bfe67e4c92cc69796c7fbb81375a0461
186 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains a large number of external links, many hosted on disposable domains, suggesting a link farm designed to redirect users to potentially harmful content. The primary URL, https://zajinet.ru/wix?keyword=college+panda+sat+math+pdf+free, is presented as a search result for educational material, likely a lure to encourage clicks.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

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://zajinet.ru/wix?keyword=college+panda+sat+math+pdf+free PDF link annotation
    • https://cdn.sqhk.co/luvuxokam/heQ9gdw/air_tycoon_online_3_hack.pdfIn PDF document text
    • https://cdn.sqhk.co/jotapepikota/gfhg3Gk/how_to_make_a_mask_lanyard.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368230/normal_60192d0f3e9d0.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4474471/normal_5fde5004a869e.pdfIn PDF document text
    • https://cdn.sqhk.co/vuvesanap/jhcMbie/flights_belfast_city_airport_to_london_gatwick.pdfIn PDF document text
    • http://generatorsale.ru/99889550744rq29m.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4479235/normal_6049a88bd6fb5.pdfIn PDF document text
    • https://cdn.sqhk.co/jivonaxadu/ijkijig/ivanka_trump_husband_wiki.pdfIn PDF document text
    • http://puveputado.sportsontheweb.net/perched_water_table.pdfIn PDF document text
    • https://zuwuroxiver.weebly.com/uploads/1/3/1/0/131070979/monika-pibususujewi-tunatunagimisev.pdfIn PDF document text
    • http://hardcreditcheck.info/bacterina_triple_bovinas2gmp.pdfIn PDF document text
    • http://kirudikegopoded.sportsontheweb.net/95684257191.pdfIn PDF document text
    • http://santaparker.store/structural_analysis_9th_edition_hibbelerw4v8z.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4404503/normal_6024a1324d930.pdfIn PDF document text
    • https://segalupozido.weebly.com/uploads/1/3/0/7/130738693/40b72fb908ffa7b.pdfIn PDF document text
    • https://nurosamemozixa.weebly.com/uploads/1/3/4/3/134375837/4354278.pdfIn PDF document text
    • http://madewithsunshine.com/pampered_chef_brownie_pan_recipe_bookletlgbte.pdfIn PDF document text
    • http://fukerijinexin.mygamesonline.org/dmv_audiobook_virginia.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4488810/normal_60390b6817fdc.pdfIn PDF document text
    • https://rerigasudete.weebly.com/uploads/1/3/4/4/134498455/2025854.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://d1159ab4-cbf5-42eb-897b-83a5e94cd7da.filesusr.com/ugd/536122_25d6d59ad50d45d3ae591f87d3e7a46b.pdf?index=trueIn PDF document text
    • https://a5a7f18c-b887-48a0-80cc-3627c14345d5.filesusr.com/ugd/609f59_11f7158839204f24bd415c315e533ad4.pdf?index=trueIn PDF document text
    • https://6440a9f6-5e82-4153-977b-4ffe9374ec4a.filesusr.com/ugd/7182f3_141590dd7277427d9b0665bb0b086e9b.pdf?index=trueIn PDF document text
    • http://vawerudarasikow.myartsonline.com/what_is_the_value_of_2007_toyota_corolla.pdfIn PDF document text
    • http://xowilewegiwo.myartsonline.com/survey_data_analysis_in_r.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_off0000d309.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD309 5360 bytes
SHA-256: 06e67aea2dad083cd3ca4547ba4169f91f46bc443bfdb50fa9881e5c64a5e7a2
font_01_sfnt_off0000e519.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE519 10596 bytes
SHA-256: 82cb49f0be5cbbbd48e192763d18de4aae95cc8a76dc373cbcf6bfbd78b0c2b2