Malicious PDF — malware analysis report

Static analysis result for SHA-256 b2f841bff79a5849…

MALICIOUS

PDF

90.2 KB Created: 2021-07-09 18:57:28 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-14
MD5: ae35e6e4100a5249f1cdcd69576b3c0c SHA-1: 2d78b020d1c85f6f10898b9f097d724ac33d9bc2 SHA-256: b2f841bff79a58494f85d17b27cc58cd4fe4f8ca912e11fd88172c8faa5d107d
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains numerous links to compromised websites, suggesting it is part of a link farm designed to trick users into downloading further malicious content. The presence of a 'download button' heuristic further supports the phishing lure attack pattern.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9765

Heuristics 7

  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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=conjuring+tamil+dubbed+full+movie PDF link annotation
    • http://www.bewegeninarnhem.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1608a7db4cbd06---97788476860.pdfIn PDF document text
    • https://techson-cctv.com/upload/file/gamumudod.pdfIn PDF document text
    • http://saothienemb.com/uploads/images/files/sibezebuja.pdfIn PDF document text
    • https://www.medipratik.com/wp-content/plugins/formcraft/file-upload/server/content/files/160d1ec33ac6dd---47168736271.pdfIn PDF document text
    • https://wentworthre.com/wp-content/plugins/super-forms/uploads/php/files/335a20241288e95e47e5c3a3f832ec15/kukogew.pdfIn PDF document text
    • http://alternativefitness.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/1607f1a25934ee---lebevar.pdfIn PDF document text
    • https://www.rath-catering.de/wp-content/plugins/formcraft/file-upload/server/content/files/160ae90d857231---33439962107.pdfIn PDF document text
    • https://luxurytravel-show.com/wp-content/plugins/super-forms/uploads/php/files/1f1a46d9d99164c094d433c08946244d/kexuleba.pdfIn PDF document text
    • http://arcomproltd.com/userfiles/file/fapededu.pdfIn PDF document text
    • https://menuiserie-sainte-anne.fr/userfiles/file/87146480516.pdfIn PDF document text
    • http://argol-editions.fr/userfiles/file/92200702502.pdfIn PDF document text
    • https://harkakotony.hu/UserFiles/file/38767732506.pdfIn PDF document text
    • http://ecbpolska.pl/wp-content/plugins/super-forms/uploads/php/files/1b0da0a811fd815c30c77e3af78f1b1f/bukatep.pdfIn PDF document text
    • http://www.hcibatiment.fr/wp-content/plugins/formcraft/file-upload/server/content/files/160bcf207975a6---8014113414.pdfIn PDF document text
    • https://www.pferde-fuer-unsere-kinder.de/wp-content/plugins/formcraft/file-upload/server/content/files/1607544531b221---reguro.pdfIn PDF document text
    • https://jdbailbonds.com/wp-content/plugins/super-forms/uploads/php/files/79d8dc96b2de1daad49e6d7bfa154c42/tisikamaf.pdfIn PDF document text
    • http://eska-lift.ru/userfiles/file/jifodenazi.pdfIn PDF document text
    • https://humanistbeauty.com/wp-content/plugins/super-forms/uploads/php/files/ul7ipf9f6sr7g98pcf0u8p8mtj/37490624984.pdfIn PDF document text
    • https://glass-haus.ru/wp-content/plugins/super-forms/uploads/php/files/37d253b39621852410adda2f29e1baac/newiwajagirudilenuwojux.pdfIn PDF document text
    • http://jouezadomicile.org/clients/4/49/49939bf6a151252ba1adfe53d1befa29/File/megumovapejugenugu.pdfIn PDF document text
    • http://mognational.com/wp-content/plugins/formcraft/file-upload/server/content/files/160881ac0c3a98---87001433963.pdfIn PDF document text
    • http://svaz-podnikani.cz/files/file/21728438170.pdfIn PDF document text
    • https://iva-vietnam.com/userfiles/file/13383647537.pdfIn PDF document text
    • http://karat-dobremiasto.pl/userfiles/file/79615958324.pdfIn PDF document text
    • http://www.hypnotiseur.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607b79873aac8---19834490251.pdfIn PDF document text
    • https://sharpspringwww.kinsta.cloud/wp-content/plugins/super-forms/uploads/php/files/71acf9b4dc10d50c7c78d8e22155d42d/jiridi.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e6cd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE6CD 16448 bytes
SHA-256: 4ed4c728a391374d3c504a8d08de0f9d69fe0b01d8649249fe92233f406b54a0
font_01_sfnt_off000111a6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x111A6 10996 bytes
SHA-256: 26a1ccf67bca7ba5501b10e46df55f5d5fc994d4eaf011e8831cf3607571ceb3
font_02_sfnt_off00012af9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12AF9 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_03_sfnt_off0001430a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1430A 16740 bytes
SHA-256: 5cfd1f8f652ffd24895f1d56b7045b3fbf03443eba2ebe963e318a3fa48dce93

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