Malicious PDF — malware analysis report

Static analysis result for SHA-256 02cd6f91cd41acfc…

MALICIOUS

PDF

84.6 KB Created: 2021-04-22 21:55:23 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-07
MD5: 9ae647442290f2b2dd484e8a5ed71a2d SHA-1: ecaecbcad59f07714814eea976f0810ec8e2c031 SHA-256: 02cd6f91cd41acfc59c02352717c81ab2a081284c2acd149a4c0b578c904ae3f
126 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, with a primary focus on a link farm hosted on disposable domains, indicating a phishing or malicious redirection attempt. The ML classifier and ClamAV detection strongly suggest malicious intent, likely related to phishing or malware distribution. The document body, though heavily obfuscated, suggests a lure related to business proposals.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9967

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://nipisod.ru/strik?utm_term=how+to+write+a+business+proposal+video PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4459035/normal_6044947041cac.pdfIn PDF document text
    • http://accueilcmb.com/why_do_i_have_a_sore_spot_on_my_scalpkmugp.pdfIn PDF document text
    • http://peuer.xyz/html_book_in_hindi_free_download57fwg.pdfIn PDF document text
    • http://dektesheff.xyz/adapter_plug_for_android_boxonj60.pdfIn PDF document text
    • http://milanbeach.fun/old_yeller_characters_summarywf4jl.pdfIn PDF document text
    • http://fametasubub.22web.org/87982834898.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4369512/normal_5fca206ade5a7.pdfIn PDF document text
    • http://mini-cam-v2.club/how_to_update_blue_point_microscan_36gtts.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4491669/normal_5fd8faaa4c90a.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://lolowavedipugis.rf.gd/physics_formulas_cheat_sheet.pdfIn PDF document text
    • https://s3.amazonaws.com/daniwodug/character_mind_map_template.pdfIn PDF document text
    • http://tixisodid.epizy.com/effects_of_structural_adjustment_programs_in_zambia.pdfIn PDF document text
    • http://jizonizop.rf.gd/23769396304.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5f3bb60b-2726-4354-98da-54fc1f1a34d2/can_you_watch_twilight_zone_on_netflix.pdfIn PDF document text
    • http://lomizawok.epizy.com/55270071207.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/04eb8a58-967a-4ae8-aaca-fc42eed4e3a7/andrew_loomis_creative_illustration_amazon.pdfIn PDF document text
    • https://s3.amazonaws.com/sagotomagin/74251125633.pdfIn PDF document text
    • http://vuloroluget.rf.gd/can_adults_read_percy_jackson.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b8fee023-d587-4a74-b553-32d256a3bb8a/html_learning_video_tutorials.pdfIn PDF document text
    • http://pevibije.rf.gd/types_of_metamorphism.pdfIn PDF document text
    • https://s3.amazonaws.com/loranoduzuja/ergonomics_in_the_office.pdfIn PDF document text
    • http://jizonizop.rf.gd/kalinka_sheet_music.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/91a2c9a1-8514-457d-876d-12770824bf02/can_i_get_microsoft_flight_simulator_on_xbox_one.pdfIn PDF document text
    • https://s3.amazonaws.com/wazorixekunafob/99533115724.pdfIn PDF document text
    • https://s3.amazonaws.com/nemafu/luvoradopo.pdfIn PDF document text
    • http://pimudovi.epizy.com/binomial_series_formula.pdfIn PDF document text
    • http://megokog.epizy.com/a_young_peoples_history_of_the_united_states_chapter_4.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_off00010ef7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10EF7 5204 bytes
SHA-256: 25f4109c2b8dd18a1962cd4f616f2137df950695ae0a1998484209a197be93c9
font_01_sfnt_off000120c5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x120C5 10520 bytes
SHA-256: 981d2265610647a95ac25867a49af33fbc9f8dfc10c72ae90fc59ded04709c85