Malicious PDF — malware analysis report

Static analysis result for SHA-256 1eece93fee6f06f8…

MALICIOUS

PDF

85.6 KB Created: 2021-06-30 01:29:19 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-08-25
MD5: eaf80ec167b1730a5990767fb3175523 SHA-1: b3a7241ac054b9d652fc7b07fff47f813a9d0a23 SHA-256: 1eece93fee6f06f8a0bbb3b1a3dd10e1597196ccfaa8690f95b35a0ba4ecae74
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged as malicious by a machine learning classifier and ClamAV. It contains numerous links to external websites, many hosted on compromised WordPress sites, suggesting a link farm or phishing lure. The presence of embedded URLs and the nature of the heuristics indicate that the document is designed to redirect users to malicious content, likely for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9951

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=behavior+observation+of+students+in+schools+form PDF link annotation
    • https://lsp.od.ua/wp-content/plugins/super-forms/uploads/php/files/m3hf2qk7620tm8cboscfoa4dh0/dexitadasareg.pdfIn PDF document text
    • http://cohn-vossen.com/wp-content/plugins/formcraft/file-upload/server/content/files/16070267623dce---jodugowirogodalobisagipo.pdfIn PDF document text
    • https://tirthmobile.com/wp-content/plugins/super-forms/uploads/php/files/i8ep0m67c0g7kbo8d23v88a468/majerul.pdfIn PDF document text
    • https://xn--80adj7cxa.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/e188dcf4a2071e5e8b148995f0cc6335/denigez.pdfIn PDF document text
    • http://themultifold.com/wp-content/plugins/super-forms/uploads/php/files/4ss8h8r6c8tqdk4euv7v1j8283/5420574690.pdfIn PDF document text
    • http://anandtouristcorporation.com/uploads/41631111662.pdfIn PDF document text
    • http://ausafe.net/images/art/files/mizogijewinexujam.pdfIn PDF document text
    • https://theshairpodcast.com/wp-content/plugins/super-forms/uploads/php/files/4a3d6eee79c6649f5baa919f4b9cf6e7/tomugibidokafoxelemixama.pdfIn PDF document text
    • http://fitviewer.de/files/file/luxoniselazebuvegogu.pdfIn PDF document text
    • http://mjacz.cz/soubory/files/nanugurejovi.pdfIn PDF document text
    • http://cottoneauto.it/userfiles/files/tonurebotiti.pdfIn PDF document text
    • https://www.duffylighting.com/wp-content/plugins/super-forms/uploads/php/files/2d80a4543c49d550c3ddafdaa2962b50/30529398981.pdfIn PDF document text
    • http://jakebenmd.com/clients/0/0e/0eef9d569b11303d075d19626cc6f958/File/wuvefosagan.pdfIn PDF document text
    • http://eperon-kochersberg.com/img_db/96072188521.pdfIn PDF document text
    • http://kayapaliinsaat.net/file/nimopejitugosesuzobesa.pdfIn PDF document text
    • https://www.urban-quartz.co.uk/wp-content/plugins/super-forms/uploads/php/files/232fda395e6f860bd47a5a89f501cd1f/51529726280.pdfIn PDF document text
    • http://alsumiri.net/wp-content/plugins/super-forms/uploads/php/files/13681273fb0596fb04be607799071f30/salerelubegixiwibojumur.pdfIn PDF document text
    • http://www.melodypods.com/wp-content/plugins/formcraft/file-upload/server/content/files/160883b8c25c11---tixeza.pdfIn PDF document text
    • https://maugli24.ru/wp-content/plugins/super-forms/uploads/php/files/6366cf57f434106bc4bcaa74ad259903/4808176918.pdfIn PDF document text
    • http://www.petersmetalstitching.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/1608f262e26bae---42571100260.pdfIn PDF document text
    • http://www.hj-bouwt.be/wp-content/plugins/formcraft/file-upload/server/content/files/16079ebfdd1fb9---pegusufulapogufupujeseviw.pdfIn PDF document text
    • http://olympusflights.com/files/files/vuzemujes.pdfIn PDF document text
    • http://cnex.cc/images/blog//file/48666433039.pdfIn PDF document text
    • http://janyska.home.pl/_mjanyska2013/fotki/file/fofotinowe.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_off0000eae3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEAE3 11100 bytes
SHA-256: 32e4f24bd14742107a36eb2409d165bab7fab636cf23f8b0a17123cd38ab0b16
font_01_sfnt_off0001049f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1049F 16292 bytes
SHA-256: ca1c12a6c9b4d66205eeeea79623f65ad5b6003fc3c02b9c4ff45b825b220741
font_02_sfnt_off00012ed3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12ED3 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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