Malicious PDF — malware analysis report

Static analysis result for SHA-256 39bcb5aeee3ae9bf…

MALICIOUS

PDF

98.0 KB Created: 2021-02-26 13:36:18 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-26
MD5: 06cd5eebd0c5c03ae1690094d2c60886 SHA-1: 7fe4946d6bd960ce1afff7b287802441ecb604b2 SHA-256: 39bcb5aeee3ae9bfedaeeb47537f2f8aaf85a197303d4985df0cc3a099b57291
126 Risk Score

Malware Insights

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

The PDF file contains numerous embedded URLs, many of which point to disposable domains and are part of a link farm, indicating a phishing or malicious redirection attempt. The ML classifier and ClamAV detection strongly suggest malicious intent, likely related to phishing or malware distribution. Although no scripts were explicitly extracted, the PDF structure and embedded URIs are indicative of a malicious document designed to redirect users to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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://mezovuduw.ru/aws?utm_term=best+dragon+books+for+12+year+olds PDF link annotation
    • https://cdn.sqhk.co/sivofedexim/jihdjii/car_simulator_2_hack_apk_mod_download.pdfIn PDF document text
    • https://cdn.sqhk.co/loxowopiv/5z7gez3/86429814916.pdfIn PDF document text
    • http://vazawujuzu.sportsontheweb.net/lolulonata.pdfIn PDF document text
    • http://sujabupinoda.scienceontheweb.net/tipos_de_fichas_de_trabajo_y_sus_caracteristicas.pdfIn PDF document text
    • https://cdn.sqhk.co/fovulifavu/fibgdhe/4901866456.pdfIn PDF document text
    • http://lajodibibodi.getenjoyment.net/jugekumogaxoko.pdfIn PDF document text
    • https://cdn.sqhk.co/puvubuzu/GGQjhhg/fegomopufukixafopitesu.pdfIn PDF document text
    • http://vogeposekuxav.66ghz.com/bellows_beach_jellyfish_report.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
    • http://zozujuzozupu.rf.gd/wuxofewotegidebafe.pdfIn PDF document text
    • http://rususekobijo.myartsonline.com/11095488542.pdfIn PDF document text
    • http://ligoroxenafof.atwebpages.com/sapuxenideloxalizi.pdfIn PDF document text
    • http://jozobudesurarab.onlinewebshop.net/how_to_tell_if_golf_cart_solenoid_is_bad.pdfIn PDF document text
    • http://pulupalu.epizy.com/1355983917.pdfIn PDF document text
    • https://s3.amazonaws.com/dejolavubukugeb/jekijowafesivuli.pdfIn PDF document text
    • https://s3.amazonaws.com/bezorito/danugazurujuvajuzekef.pdfIn PDF document text
    • https://s3.amazonaws.com/galinikagopit/47703802788.pdfIn PDF document text
    • http://sajetubaj.epizy.com/28909546924.pdfIn PDF document text
    • http://bozisiruvaletun.rf.gd/bruce_lee_film_songs_free.pdfIn PDF document text
    • http://mopunetite.epizy.com/garuxagedefojeko.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00012ccc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12CCC 5352 bytes
SHA-256: 95d590667fe4d23ec76ec6884697b8f18f3c27d6e678543d81e73d70b997602c
font_01_sfnt_off00013f17.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13F17 1796 bytes
SHA-256: c9c850e9c351ce199d5e9d1c42a783cd39d33267a74ccb43d8a2fed304f07254
font_02_sfnt_off000147a2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x147A2 10740 bytes
SHA-256: ee45a93b9b407dfb691ac96fccfc688765b0d63d7152ef8b41f015dac7c41aac
font_03_sfnt_off00016bcf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x16BCF 4324 bytes
SHA-256: 1158d95dac44631f497756703988ba3645251422e7ff0015d3fca430225e7c3e

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