Malicious PDF — malware analysis report

Static analysis result for SHA-256 0ef72141ea8590f8…

MALICIOUS

PDF

78.7 KB Created: 2021-02-26 02:56:28 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: 017286bd198abde6089cd2586ba8e42d SHA-1: 119ebcdfce96fe3fa36e14b9e26bf61888012fad SHA-256: 0ef72141ea8590f838b886599925fd29088c63e8de350d3a7fe2bf672d99571a
126 Risk Score

Malware Insights

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

The PDF document contains numerous embedded URLs, many pointing to disposable hosting, and is flagged by ML classifiers and ClamAV as malicious. The document body, though heavily obfuscated, suggests a lure related to a 'Harman kardon onyx service manual', indicating a phishing or malware distribution attempt. No scripts were extracted, but the presence of external links and the overall heuristic profile strongly suggest malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://maypoin.ru/strik?utm_term=harman+kardon+onyx+service+manual PDF link annotation
    • https://zetidikusas.weebly.com/uploads/1/3/4/7/134740093/petizekejeput_xaxajimad.pdfIn PDF document text
    • http://pozijuza.scienceontheweb.net/naxodowixokupira.pdfIn PDF document text
    • http://sijubuwejipamun.mywebcommunity.org/pinigaxazejatafob.pdfIn PDF document text
    • https://rujurujubawupof.weebly.com/uploads/1/3/0/9/130969172/muxibuwevebut_rofuxur_xobadifevu_limevafure.pdfIn PDF document text
    • http://basvuruizleme.online/oster_bread_maker_replacement_parts5lu92.pdfIn PDF document text
    • https://lodobapidadisu.weebly.com/uploads/1/3/1/1/131164557/lapegipof-jipizixolobel.pdfIn PDF document text
    • https://xorizetevapaze.weebly.com/uploads/1/3/1/4/131438163/816b0.pdfIn PDF document text
    • http://lubenoredeji.mypressonline.com/foderabavobude.pdfIn PDF document text
    • http://punavuvipufov.sportsontheweb.net/how_to_turn_off_closed_caption_on_sanyo_tv_without_remote.pdfIn PDF document text
    • http://zugapuvu.mywebcommunity.org/on_becoming_a_person_book_depository.pdfIn PDF document text
    • https://sepanafawo.weebly.com/uploads/1/3/4/3/134316973/6c73ab2671b.pdfIn PDF document text
    • http://fringigejy.site/81234653409j2s.pdfIn PDF document text
    • http://pefiworawodud.mypressonline.com/write_a_frequency_distribution_table_for_the_following_data.pdfIn PDF document text
    • http://zawugudumi.getenjoyment.net/muzeriki.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://wutejaxevewef.myartsonline.com/62093393816.pdfIn PDF document text
    • http://xuvekixofeku.onlinewebshop.net/vurafiliwarerezepalixup.pdfIn PDF document text
    • http://tavoxelelenasi.onlinewebshop.net/the_leftovers_season_1_episode_8_review.pdfIn PDF document text
    • http://wadoromutisagar.myartsonline.com/what_is_the_role_or_job_of_an_organism_in_an_ecosystem.pdfIn PDF document text
    • http://bitines.myartsonline.com/88384680258.pdfIn PDF document text
    • http://gosaduzunake.myartsonline.com/how_to_stretch_for_plantar_fasciitis.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_off0000f4d3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF4D3 5340 bytes
SHA-256: 456dc00df3618221b51318fa7fde0bbb59473dc31325508ae5e2209880eafa16
font_01_sfnt_off000106f6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x106F6 10716 bytes
SHA-256: 3ec3bb211d43c1783948bcc5bd83a76415aeb121e4982ef35362706ef7620517

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