Malicious PDF — malware analysis report

Static analysis result for SHA-256 4b0653ebdaa756bc…

MALICIOUS

PDF

68.6 KB Created: 2021-02-16 14:15:00 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-25
MD5: bae70e8d04f2ff3a39741ee3324ba05b SHA-1: 40e06f868ed17f4b7c3049dc6c3bed88cdb52d7e SHA-256: 4b0653ebdaa756bc3a3e612751f8bbe9fdb8a6d0bf75a6ca12a4dffe7687eb90
126 Risk Score

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://druttle.ru/wix?keyword=words+starting+aq PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4369518/normal_6025cd18b3738.pdfIn PDF document text
    • https://jematujevuzonip.weebly.com/uploads/1/3/4/2/134235480/368f56eebf8363.pdfIn PDF document text
    • https://cdn.sqhk.co/jabupexipa/RijeGmP/war_of_the_west_2019_season_2.pdfIn PDF document text
    • https://cdn.sqhk.co/jerivudofin/jjeIhbm/nojubifejuzolasaka.pdfIn PDF document text
    • https://posapana.weebly.com/uploads/1/3/1/4/131454172/acf56ea45eea7e7.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4500440/normal_5fd2019b60769.pdfIn PDF document text
    • https://cdn.sqhk.co/jukelifawap/dAjgpih/pearl_drum_set_price_in_nepal.pdfIn PDF document text
    • https://cdn.sqhk.co/xuwolegu/hhc8ZPn/teddy_roosevelt_rough_riders_shirt.pdfIn PDF document text
    • https://cdn.sqhk.co/rawerusiwala/jheOMhg/97995616776.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4488339/normal_5fdc7c2ddb490.pdfIn PDF document text
    • https://tujeliwavujojow.weebly.com/uploads/1/3/5/3/135304707/b416a.pdfIn PDF document text
    • https://poxawakepuk.weebly.com/uploads/1/3/1/6/131606289/mesubo.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4454679/normal_5fe5e04075b7e.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
    • https://s3.amazonaws.com/suxuzubojut/california_collections_textbook_answers.pdfIn PDF document text
    • https://s3.amazonaws.com/donarepemi/free_math_worksheets_3rd_grade_number_patterns.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_off0000c0ad.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC0AD 4768 bytes
SHA-256: 192bc1ef191fc616f7b7a89de623940f459b05539cf9efc48426f374247a070a
font_01_sfnt_off0000d0e6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD0E6 11000 bytes
SHA-256: aeb5884a12cc7c0217314865e3144085dc3a1a0756144bfe9def7892b0e79c3f
font_02_sfnt_off0000f63e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF63E 4324 bytes
SHA-256: 7f6049e5011acf0e8581793f2bc2bb947aac2929fdb77abc318b2a6155c1ef71