Malicious PDF — malware analysis report

Static analysis result for SHA-256 5e058945ce8624e2…

MALICIOUS

PDF

73.4 KB Created: 2021-03-31 19:26:49 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-20
MD5: 007bc5230ae0b2e098d0d832d45bdf92 SHA-1: 5702cedd6c7c8863966202026b247cdf46b23d67 SHA-256: 5e058945ce8624e24ed4cedabefb4ea225817a7015b07a29d0a85edaf5c766c3
126 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, many pointing to disposable domains, and is flagged by ML classifiers and ClamAV as malicious phishing content. The document body, though heavily obfuscated, contains references to URLs that appear to be part of a link farm designed to trick users into downloading malicious files or visiting phishing sites. The presence of external URIs and the link farm heuristic strongly suggest a phishing or content-luring attack pattern.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

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://bologen.ru/wix?keyword=reading+the+american+past+volume+1+pdf+free PDF link annotation
    • https://cdn.sqhk.co/jogibigeda/jj0hiLZ/52642226846.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4383565/normal_5fd79c96648cf.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4450140/normal_605dfce992998.pdfIn PDF document text
    • http://duwuzoruperiged.scienceontheweb.net/alter_ego_plus_a2_cahier_d_activits_corrigs.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4467955/normal_5fe92696010c9.pdfIn PDF document text
    • http://medakijizu.22web.org/11367288896.pdfIn PDF document text
    • http://kimiter.medianewsonline.com/oxford_dictionary_of_geography_free_download.pdfIn PDF document text
    • http://tivuximuliku.mygamesonline.org/what_to_bring_for_ny_road_test.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4387698/normal_5fd0857ea0762.pdfIn PDF document text
    • https://cdn.sqhk.co/gikokimofegi/eA8y2Gg/kung_fu_fight_3gp_video_download.pdfIn PDF document text
    • https://cdn.sqhk.co/navuwamas/gighikM/namemekefawuzexuwigo.pdfIn PDF document text
    • http://govuled.mywebcommunity.org/best_reader_for_books_android.pdfIn PDF document text
    • https://cdn.sqhk.co/vagofedewat/jajjaif/wogunutefagelalolo.pdfIn PDF document text
    • https://cdn.sqhk.co/fedijadika/Gigighc/ballet_couple_dancing_image.pdfIn PDF document text
    • http://vivubowi.getenjoyment.net/fifebakefofezuvumoviz.pdfIn PDF document text
    • http://zevibeponakat.getenjoyment.net/39948513106.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
    • http://zotodigigaki.epizy.com/physics_kinematics_worksheet_1_answers.pdfIn PDF document text
    • https://03a45e23-20c9-4b13-8d21-50c2609e56df.filesusr.com/ugd/502f3d_5022248157464f2285f10042b86e3d0e.pdf?index=trueIn PDF document text
    • http://kunibenurupamiv.rf.gd/ultraviolet_and_visible_absorption_spectra.pdfIn PDF document text
    • http://pelatid.epizy.com/airplane_simulator_games_free_for_pc.pdfIn PDF document text
    • https://391e4f24-9fc9-4707-ac06-338edcd9f959.filesusr.com/ugd/110ef3_4f34bcea010f40efbab2f9285206d0cd.pdf?index=trueIn PDF document text
    • http://kubowulurarekij.myartsonline.com/milamepixuvadijokamedu.pdfIn PDF document text
    • http://jatujij.rf.gd/mofirodikebanokulonox.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_off0000d41e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD41E 5572 bytes
SHA-256: eadb67992881a09782ed99b6eefb7dafcea2c5ec52ab0c6803420ee4f96670eb
font_01_sfnt_off0000e6ea.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE6EA 10228 bytes
SHA-256: d4b4c55aea6e2c74178d2b4e7471134c3f02e06107aaad0134c72a0463167bb9
font_02_sfnt_off000109e7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x109E7 4324 bytes
SHA-256: a542ec26cea93e049a2e27cd59b1347dd9bbdea13775fd7b822b3c2b3136116f