Malicious PDF — malware analysis report

Static analysis result for SHA-256 d2e8bbe1b5fec4e2…

MALICIOUS

PDF

73.8 KB Created: 2021-03-13 21:37:22 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-20
MD5: 4764432b56500d4440ac0712b235744c SHA-1: b0134d7adf0199e6877f40c56256b02e2d1800eb SHA-256: d2e8bbe1b5fec4e2b10b3ed5ce34c991d9a0316f583c2cce42a9375ea041679d
126 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs pointing to disposable domains, indicating a link farm or phishing lure. The ML classifier and ClamAV detection strongly suggest malicious intent, likely for distributing further payloads or conducting phishing. While no scripts were explicitly extracted, the PDF structure and embedded URLs are indicative of a malicious document, potentially leveraging embedded JavaScript for malicious actions.

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://ponafet.ru/award?keyword=list+of+count+and+noncount+nouns+pdf PDF link annotation
    • http://kuzexamipapoxip.medianewsonline.com/algebra_1_2_third_edition_answers.pdfIn PDF document text
    • http://fawikenaxalu.scienceontheweb.net/aluminium_alloy_composition.pdfIn PDF document text
    • http://rbqjkwklnd.xyz/53817451397f42ey.pdfIn PDF document text
    • http://falorilipeb.mywebcommunity.org/vodegakidema.pdfIn PDF document text
    • http://rubyshup.space/easy_crossword_puzzles_with_answers60f3n.pdfIn PDF document text
    • http://bodipok.getenjoyment.net/29387347494.pdfIn PDF document text
    • http://tuxesimufimiti.mypressonline.com/machine_learning_tutorial.pdfIn PDF document text
    • http://dom-bita.org/mulowideparibesavpsh6o.pdfIn PDF document text
    • http://fukazab.mywebcommunity.org/beviwexekarudejatowuv.pdfIn PDF document text
    • http://cafechorsu.ru/how_to_program_ge_universal_remote_to_roku_tvx25km.pdfIn PDF document text
    • http://redofokotab.sportsontheweb.net/71690096210.pdfIn PDF document text
    • http://mavitrade.com/clicker_universal_remote_genied4b2s.pdfIn PDF document text
    • http://pugisapi.mypressonline.com/4400462732.pdfIn PDF document text
    • http://yoga-italy.space/at_t_u_verse_modem_router_setupm2fck.pdfIn PDF document text
    • http://xumupizaxuto.scienceontheweb.net/the_kiss_quotient_audiobook.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/patilawasu/joomla_ecommerce_free_template.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0f0cee90-e7a1-4664-8a1b-8e4f319a27b6/xomobozezogokidulujuz.pdfIn PDF document text
    • https://s3.amazonaws.com/xuzed/marla_maples_new_boyfriend.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0adf3f0a-3a2d-48bc-9b50-aba8e85ce203/i-102_uscis_fee.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/33a4356a-1aa6-4ed3-bfff-9e00a9fa94cc/burger_king_menu_prices_and_offers.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0b09e01b-804b-4d16-85e7-b7dc521d0647/four_a_divergent_collection_full_movie.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_off0000e4fb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE4FB 4964 bytes
SHA-256: 8824eefd25c54e849235b7b3f3f3d52331bc3085b94a8b82d23676f2e00bb6bd
font_01_sfnt_off0000f5ff.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF5FF 10504 bytes
SHA-256: e9791b0a5ba9045b8618be4759123f2013883935312c2c2b88882cdedb817d8f

Open this report in the interactive analyzer, or submit your own file for analysis.