Malicious PDF — malware analysis report

Static analysis result for SHA-256 88fc0bd562588afb…

MALICIOUS

PDF

90.9 KB Created: 2021-08-20 07:32:29 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26
MD5: b160bd761204a6e3252675e7e54ad3c4 SHA-1: 7a8f59052a83050eff2564fe1c34e605125fff8f SHA-256: 88fc0bd562588afb5a99b7fb4aedd97736da49a41846cb24bd36132da2c149c8
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF file was flagged as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. It contains numerous links pointing to compromised websites, specifically within WordPress upload directories, suggesting a link farm or phishing lure. The presence of these links and the overall structure strongly indicate an attempt to redirect users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9979

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 http://christembassydocklands.org/wp-content/plugins/super-forms/uploads/php/files/157e4cd73aef9278c7a40fd29e450d43/fajekawarexajixifi.pdf In PDF document text
    • https://www.pferde-fuer-unsere-kinder.de/wp-content/plugins/formcraft/file-upload/server/content/files/160c067c52282f---77067080662.pdfIn PDF document text
    • https://vayamcs.com/content_files/files/82075957512.pdfIn PDF document text
    • https://gilbertems.com/videos/file/33673797377.pdfIn PDF document text
    • http://www.logomarcanet.com/userfiles/file/betib.pdfIn PDF document text
    • https://xn--1--8kcai1ck2bs.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/6f6498568dc8a171486b92ce322f91e0/newevivun.pdfIn PDF document text
    • https://gyandeepjkss.org/userfiles/file/pisexevopimutitekix.pdfIn PDF document text
    • https://cruiseship.cruises/wp-content/plugins/super-forms/uploads/php/files/0g3ci87clv0pp4m9icpuv0mcc0/29447677357.pdfIn PDF document text
    • http://cascinamana.it/userfiles/file/xamekegaw.pdfIn PDF document text
    • http://whewfamily.com/clients/12004/File/14812501115.pdfIn PDF document text
    • https://www.costaverde.it/wp-content/plugins/formcraft/file-upload/server/content/files/160986800d5a21---kuwazoxikefumes.pdfIn PDF document text
    • https://totalyoumovement.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b41de5a0e3c---vomoluwafusizomuko.pdfIn PDF document text
    • http://www.patricktennis.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160823741012c8---devabaloxa.pdfIn PDF document text
    • http://www.segurosfacility.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160a978443fbcb---zusajasuwaxola.pdfIn PDF document text
    • http://kwik-it.ru/wp-content/plugins/formcraft/file-upload/server/content/files/1608e6c289203c---92060905782.pdfIn PDF document text
    • https://mobilieroccasion.fr/uploads/file/memazavu.pdfIn PDF document text
    • https://maloneslandscape.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606c7a64a44d7---lunatupekuluvu.pdfIn PDF document text
    • https://emilline.dk/ckfinder/userfiles/files/pifevekanigukavozomow.pdfIn PDF document text
    • http://www.jhannahs.com/wp-content/plugins/formcraft/file-upload/server/content/files/160d8ee18ab8a3---zoruvelidekejasapoxi.pdfIn PDF document text
    • https://theshairpodcast.com/wp-content/plugins/super-forms/uploads/php/files/c05206e2ccd7916cdb8c307fc82448f7/55713731210.pdfIn PDF document text
    • https://c4ir.ae/wp-content/plugins/super-forms/uploads/php/files/vtsu7qi0n56i0ejpvlrivakiv6/52494649006.pdfIn PDF document text
    • https://protechlighting.com/wp-content/plugins/super-forms/uploads/php/files/84c8dff32387813ad7dfe31f74efe501/13224898870.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/BkSY9tpko7c/uplcv?utm_term=el+patito+feo+resumen+brevePDF link annotation
    • 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_off0000fae2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFAE2 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off000112f4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x112F4 19124 bytes
SHA-256: 3802f46d3caf73e9e505084eb31b3cc860ecd9ecdb91923fc269f6fb4ebbd36f
font_02_sfnt_off000143f9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x143F9 10808 bytes
SHA-256: db81c40b1f4e8056993a88a2ff843aea22a91a90904358d7c68f3429556fd35b

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