Malicious PDF — malware analysis report

Static analysis result for SHA-256 889f95008cc731cc…

MALICIOUS

PDF

73.3 KB Created: 2021-06-07 19:27:48 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-25
MD5: 5daa9c0aaca36e9f3731176097710e4b SHA-1: 456ce909d1f0f8c353762ba489cf102851b87ea4 SHA-256: 889f95008cc731cc8d5835ce3be27100ec0963c0ded87ab506cb702650859ed1
126 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, with one prominent URL leading to a domain associated with phishing and malware distribution. The ML classifier and ClamAV detection strongly indicate malicious intent. The document body, though heavily obfuscated, suggests a lure related to legal templates, aligning with common phishing tactics.

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://queure.ru/pbw?utm_term=contract+for+sale+of+land+nsw+2018+template PDF link annotation
    • https://siralukamowifi.weebly.com/uploads/1/3/1/4/131407299/wulekapujipitejif.pdfIn PDF document text
    • https://bixemasabomevis.weebly.com/uploads/1/3/4/5/134517571/0ca08c74.pdfIn PDF document text
    • https://nugubigu.weebly.com/uploads/1/3/5/3/135323865/6058893.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://xizisimavi.pbworks.com/w/file/fetch/144541731/how_to_clean_water_filter_on_maytag_washer.pdfIn PDF document text
    • http://gabekujijud.pbworks.com/f/zajigitikew.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2fbafbbc-5a44-4102-90d9-b325fdf3d5bf/shark_rotator_powered_lift-away_speed_bagless_upright_vacuum_reviews.pdfIn PDF document text
    • http://pimepovume.pbworks.com/f/43640709759.pdfIn PDF document text
    • http://vajaxasave.pbworks.com/f/2002_ski-doo_service_manual_free_download.pdfIn PDF document text
    • http://silasofinat.pbworks.com/w/file/fetch/144443190/rifawegezakebazokiribura.pdfIn PDF document text
    • http://pezaloribed.pbworks.com/w/file/fetch/144628806/defensa_siciliana_variante_dragon.pdfIn PDF document text
    • http://kufujibumufa.pbworks.com/f/how_to_design_cable_stayed_bridge.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/238920e1-0a16-48e9-896d-9626aa091a8f/fukemofasofudesisoba.pdfIn PDF document text
    • http://jebodigezev.pbworks.com/f/surah_baqarah_in_english_download.pdfIn PDF document text
    • http://tisowowuduwe.pbworks.com/f/formalistic_approach_in_literary_criticism_ppt.pdfIn PDF document text
    • http://kedetuwi.pbworks.com/f/athulitha_baladama_hanuman_chalisa_lyrics_telugu.pdfIn PDF document text
    • http://zevatirupura.pbworks.com/w/file/fetch/144624939/how_to_calculate_enthalpy_change_per_mole.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_off0000deed.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDEED 5816 bytes
SHA-256: 9d677fabb20ee102f1b712b8c5af74363b31a114dbe79cf53ec221877be94d2d
font_01_sfnt_off0000f2b8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF2B8 11000 bytes
SHA-256: 29c7d428ee0d59babc9efacf5c1f0a64c352677395cc8653af5a3324340def40

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