Malicious PDF — malware analysis report

Static analysis result for SHA-256 f301071d00151bee…

MALICIOUS

PDF

87.6 KB Created: 2021-09-22 16:15:58 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: 2d50ea850453bddcc21054f826970382 SHA-1: 0bfcf0e09ecebe1715546ede6685e408c3d15f23 SHA-256: f301071d00151bee5d43c9051f084e201976a5860854f60d49a5838771f6687d
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file contains numerous external links, many of which point to compromised WordPress sites or disposable hosting, indicating a link farm designed to lure users to malicious content. The ML classifier and ClamAV detection strongly suggest malicious intent, likely for phishing or malware distribution. Although no scripts were explicitly extracted, the nature of the links and the PDF structure suggest it's intended to exploit user interaction via embedded links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9947

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • PDF link farm points to compromised-WordPress upload storage medium PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM
    PDF contains multiple clickable links, across many distinct hosts, whose targets are random-slug files parked in the upload directories of vulnerable WordPress form plugins (FormCraft, Super Forms). This is the hallmark of the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains hosted on compromised sites. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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://chcial.ru/uplcv?utm_term=harry+potter+and+the+prisoner+of+azkaban+pc+game PDF link annotation
    • https://em.heephong.org/ethnicminorities/cmsadmin/ckfinder/files/68533663850.pdfIn PDF document text
    • https://dispecom.com/cms_dispecom/sgi_userfiles/userfiles/files/79712787350.pdfIn PDF document text
    • https://groupekheidri.com/ckfinder/userfiles/files/53804935492.pdfIn PDF document text
    • http://wimborst-ceramics.nl/ckeditor/ckfinder/userfiles/files/dumazoxitabuxegesefuzed.pdfIn PDF document text
    • https://xn--80apefbdm9ah5g.xn--p1ai/userfiles/3570232199.pdfIn PDF document text
    • https://kristinanamaste.eu/files/31485766454.pdfIn PDF document text
    • http://murito.fr/ckfinder/userfiles/files/65459814095.pdfIn PDF document text
    • http://otohondamientay.com/upload/files/25111373569.pdfIn PDF document text
    • https://alkoplast.rs/files/norumarinurunenipekif.pdfIn PDF document text
    • http://geriatriccarenewjersey.com/userfiles/files/90794423617.pdfIn PDF document text
    • https://www.lindopoint.it/wp-content/plugins/super-forms/uploads/php/files/356061e0eade1266560aff981aa77b71/50977944806.pdfIn PDF document text
    • https://anesaportugal.org/upload/file/fanumumugagiwepux.pdfIn PDF document text
    • https://40parables.com/wp-content/plugins/super-forms/uploads/php/files/e78cb7542f433467d89c21da48010285/mikekawefiji.pdfIn PDF document text
    • http://criollo-cocoa.com/userfiles/file/66185217354.pdfIn PDF document text
    • http://kaplanpm.com/wp-content/plugins/formcraft/file-upload/server/content/files/16147360ae2c71---51037152010.pdfIn PDF document text
    • http://wwsm-us.com/files/file/68689374061.pdfIn PDF document text
    • http://ne-moloko.ee/wp-content/plugins/super-forms/uploads/php/files/62072bac5d046360bccba28a2fb32e1d/pifuxuxijutugetag.pdfIn PDF document text
    • http://crystalnymph.by/wp-content/plugins/super-forms/uploads/php/files/ade471419ed97f80069d8bf9c18a7691/subikuvamusi.pdfIn PDF document text
    • http://thementalhealthadvocates.org/files/userfiles/file/peser.pdfIn PDF document text
    • https://ccveg.org/wp-content/plugins/super-forms/uploads/php/files/k3vd1s7h7nr7plppatjjv33tpq/vegemelaforifopaledaxikit.pdfIn PDF document text
    • http://ozhelalikram.de/resimler/files/51159743179.pdfIn PDF document text
    • https://netiko.ge/img/Data/file/9393118318.pdfIn PDF document text
    • https://www.actionconstructionjax.com/wp-content/plugins/super-forms/uploads/php/files/0218deabb821e06af02e1101e18ec4cd/26169490000.pdfIn PDF document text
    • https://www.mercato.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/16145652d280c4---guselanuzuladudo.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://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000eebc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEEBC 18224 bytes
SHA-256: 04b5091a009acbc02ed480d98c82257849c8c429081997f0480e73ce275fa203
font_01_sfnt_off00011e19.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11E19 11420 bytes
SHA-256: cfa5666fd40e704cd3327bc5d8c8b3b3ba8f39e7e34d2548276de5cbca5c3b6b
font_02_sfnt_off00013878.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13878 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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