Malicious PDF — malware analysis report

Static analysis result for SHA-256 0fe9e72a770f682b…

MALICIOUS

PDF

101.4 KB Created: 2021-08-27 18:27:46 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-22
MD5: 8a4536978fa50c647019fcdebfe3ee6f SHA-1: cdf8486055747840c7e36c2580944190c92d6f27 SHA-256: 0fe9e72a770f682be6e8d8d10fdd44163869d4faaa1722a6d4b041a5bbc15d20
156 Risk Score

Malware Insights

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

The PDF contains numerous links, many pointing to compromised WordPress sites, suggesting a link farm designed to redirect users to malicious content. The ClamAV detection and ML classifier further support its malicious nature, likely for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9568

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://hellnocancershow.com/wp-content/plugins/formcraft/file-upload/server/content/files/16094b4c9d4359---vopurib.pdf In PDF document text
    • http://marcth.pl/media/fck/file/xanot.pdfIn PDF document text
    • https://impariant-club.ru/wp-content/plugins/super-forms/uploads/php/files/3053096860332ad16ac6efff1fcde8c6/wazozimorovi.pdfIn PDF document text
    • http://dedanskecasinoer.dk/userfiles/file/88946460316.pdfIn PDF document text
    • http://www.almansori-ye.com/almansorifiles/files/xodivek.pdfIn PDF document text
    • https://g-ortho.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160c84df798fc8---levabuzupotejuzaxav.pdfIn PDF document text
    • http://855solution.com/htdocs/cljr/data/files/topedevopenatipalezexe.pdfIn PDF document text
    • https://www.projectorrentals.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bc0ed5a8fbe---xururidelakamovolagepus.pdfIn PDF document text
    • https://rcot.org/userfiles/file/xinenetaz.pdfIn PDF document text
    • http://ettorebelfioreliutaio.it/userfiles/files/37407395756.pdfIn PDF document text
    • https://myveolife.com/wp-content/plugins/super-forms/uploads/php/files/d1c8797704b31f771c230b5415c506b0/ruwanipibobova.pdfIn PDF document text
    • https://ceral.pl/ceral/pliki/file/kapijodig.pdfIn PDF document text
    • https://kvartira-zalog.ru/wp-content/plugins/super-forms/uploads/php/files/87ca7e7455e6e55186874a313f5c2099/28253583423.pdfIn PDF document text
    • https://roweryelectra.eu/app/webroot/uploads/file/16256805355821.pdfIn PDF document text
    • http://trackeg.com/en/wp-content/plugins/formcraft/file-upload/server/content/files/16073d41d91a68---pevavidapogubuwupej.pdfIn PDF document text
    • http://www.segurosfacility.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160fea082c6a59---suxep.pdfIn PDF document text
    • http://snailgame.ru/upload/files/20210811074308.pdfIn PDF document text
    • http://www.191seo.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607f630e2fc38---zobaganuxusupip.pdfIn PDF document text
    • https://www.dynasil.com/wp-content/plugins/super-forms/uploads/php/files/07c81f02bb6447d79676ad3f9afd30f9/kavibujobarag.pdfIn PDF document text
    • https://themalc.org/files/file/28971146706.pdfIn PDF document text
    • https://lionkingbali.com/uploads/file/wokijabofel.pdfIn PDF document text
    • http://woonhuislift.info/wp-content/plugins/formcraft/file-upload/server/content/files/1608e9bb239c2f---magixedajat.pdfIn PDF document text
    • https://3dreamvr.com/wp-content/plugins/super-forms/uploads/php/files/150b9aee777d6f1e357978c142ed393b/dorotuwenavegawoxadisobo.pdfIn PDF document text
    • http://co-wemart.com/careeruserfiles/file/18922986827.pdfIn PDF document text
    • https://o-dance.com/upload/files/mowezimila.pdfIn PDF document text
    • http://guojingmall.com/userfiles/file///zukivotuviwura.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/ngfLrbzwjls/uplcv?utm_term=the+little+book+of+colour+pdfPDF 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 5

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f64f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF64F 16488 bytes
SHA-256: b880e3d376d70fbdf47a6cfb29874cfa84dc9cf7ffdb2eced3e4ec0d856ae6b2
font_01_sfnt_off00010d3e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10D3E 10576 bytes
SHA-256: 200232e2bda6b7962a94e67256e9baa08198f6c3f0846d99ea051c80e3bd4db0
font_02_sfnt_off0001253d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1253D 25060 bytes
SHA-256: 49481c17c07cf4ef5c041833b32b22d112f460b08f5eeab5fc46a3e95b07ce92
font_03_sfnt_off0001649d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1649D 1876 bytes
SHA-256: 3f4a116b07ddc995ff348222cd86b0600369289a50c830baef7afd72150f8b04
font_04_sfnt_off00016d5b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x16D5B 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1