Malicious PDF — malware analysis report

Static analysis result for SHA-256 dade826964dbc608…

MALICIOUS

PDF

76.2 KB Created: 2021-03-20 07:48:59 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-20
MD5: cff798636d224d8a5fe6e512bd6e1fa3 SHA-1: aa5ad130a16215a0db32d963b081a1bf007342cb SHA-256: dade826964dbc608f13ef78e5d4725c1d377f72d2ffd6092f2d922cc45ff7e91
126 Risk Score

Malware Insights

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

The PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains numerous external links, many pointing to disposable hosting, and the document body suggests a lure related to 'Organisms and their environment answers'. While no scripts were explicitly extracted, the PDF structure and external link farm heuristic suggest it's designed to redirect users to potentially malicious sites, possibly for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://xezojetit.ru/123?utm_term=organisms+and+their+environment+answers PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4387230/normal_5ff68453cfeef.pdfIn PDF document text
    • http://wijofotezopadik.medianewsonline.com/programmable_logic_controllers_5th_edition_chapter_8_answers.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4464527/normal_5fe94e6b4bbcc.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4489032/normal_60153bbaec62f.pdfIn PDF document text
    • http://ruvinowuge.scienceontheweb.net/nikon_z50_dx_lens_compatibility.pdfIn PDF document text
    • http://tijudozi.scienceontheweb.net/how_to_heat_my_coleman_hot_tub.pdfIn PDF document text
    • http://doburepos.iblogger.org/libro_de_granville_calculo_integral_resuelto.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4388825/normal_5fd88e056a550.pdfIn PDF document text
    • http://volulolusawaz.mygamesonline.org/93779189039.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368492/normal_6030edfa0877b.pdfIn PDF document text
    • http://relibafogat.sportsontheweb.net/42499193576.pdfIn PDF document text
    • http://miromawetibikew.mywebcommunity.org/dukezufex.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4467287/normal_605274b71e26b.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://vidilig.onlinewebshop.net/amsterdam_coffee_shop_map.pdfIn PDF document text
    • http://viwuleraxukopiz.epizy.com/62113940409.pdfIn PDF document text
    • https://57eba762-b826-4879-8d7a-7f480aba2934.filesusr.com/ugd/e89c2b_d672fa9708db48e1a716c9ce0d831666.pdf?index=trueIn PDF document text
    • http://wekapalipewux.epizy.com/adidas_ag_balance_sheet.pdfIn PDF document text
    • http://rugafejowa.rf.gd/11455189508.pdfIn PDF document text
    • https://8aefc570-8454-48c3-bb63-d4d1067b7ce0.filesusr.com/ugd/5c9621_e6d73f0059a440c68aff111c537929ac.pdf?index=trueIn PDF document text
    • http://kadaputaboropon.rf.gd/what_does_neo_gothic_mean.pdfIn PDF document text
    • http://zuvuzevo.atwebpages.com/xumoporunatomozisew.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_off0000ec13.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEC13 5384 bytes
SHA-256: 1293d490ceba5433c459c1c3d595540bd894da859fab26c44695a4ac6849303f
font_01_sfnt_off0000fe42.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFE42 10948 bytes
SHA-256: 467f046d6f9a08ce52720a5ba86eb2890cf6cc69757dc98030a5f06b0123aaba

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