Malicious PDF — malware analysis report

Static analysis result for SHA-256 805254f388a83114…

MALICIOUS

PDF

79.0 KB Created: 2021-09-19 15:19:24 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-24
MD5: ef570f0b4d9e0a98de7a6c80762b35eb SHA-1: b8063ce32c1697e9e893b48614b2f2d7d081c95a SHA-256: 805254f388a83114fe86c4a201c50f64addd43248b3964b14af8fb3f84706c91
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged by multiple heuristics as malicious, including a high-confidence ML classifier and ClamAV detection. It contains a link farm pointing to compromised CMS uploads and disposable hosting, suggesting an attempt to distribute further malicious content. The presence of embedded URIs and the nature of the heuristics indicate a phishing or malware distribution lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9975

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://awfiowv.love-mrt.com/upload/files/55250624968.pdf In PDF document text
    • http://datacomsystems.cz/userfiles/file/bozogeratisoxapuduw.pdfIn PDF document text
    • https://backcountryplayground.com/wp-content/plugins/super-forms/uploads/php/files/cd4e4a9c7bcff313d30c77019aac5da8/78653369160.pdfIn PDF document text
    • http://dvif.fr/userfiles/file/vogotur.pdfIn PDF document text
    • http://alrabbanoilandgas.com/file/files/zirisojiluxeronidine.pdfIn PDF document text
    • https://www.partyshuttlebus.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/1612f8573ba9a9---polusivijuruguroragatiraj.pdfIn PDF document text
    • https://doctmcooper.com/userfiles/files/54328581601.pdfIn PDF document text
    • http://albertopizzetti.it/userfiles/files/40252487623.pdfIn PDF document text
    • http://bibliotekaludwin.pl/img/upload/files/20404279617.pdfIn PDF document text
    • http://photopuzzle.net/userData/board/file/85763944848.pdfIn PDF document text
    • https://magyar-logyogyasz.hu/fileok/file/80122239441.pdfIn PDF document text
    • https://ewastexperts.com/userfiles/files/nuxulusoz.pdfIn PDF document text
    • http://wpklaw.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/18070647487.pdfIn PDF document text
    • https://simplehome.ro/ckfinder/userfiles/files/86724582473.pdfIn PDF document text
    • https://infravoip.com/wp-content/plugins/super-forms/uploads/php/files/28d3a47feef5a59c12c264482951dad0/39078627301.pdfIn PDF document text
    • http://eaas-journal.org/survey/userfiles/files/letev.pdfIn PDF document text
    • http://karthikeyanjayaram.com/userfiles/file/rezinegofonobi.pdfIn PDF document text
    • http://www.luminicaambiental.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613ee1bbf084d---kasesiresuraxawinodikem.pdfIn PDF document text
    • http://dawahcity.com/userfiles/file/70239933814.pdfIn PDF document text
    • https://www.keystonecare.co.uk/wp-content/plugins/super-forms/uploads/php/files/58d2e045158c79b144d1a7ea06e55d7a/33879565383.pdfIn PDF document text
    • http://www.saraviation.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613d781b8dc52---buribusimon.pdfIn PDF document text
    • http://precisionsurgicalworks.com/alpha/ckfinder/userfiles/files/11982136190.pdfIn PDF document text
    • http://softwarefactory.nl/images/file/68446074648.pdfIn PDF document text
    • https://moulindelarroque.com/userfiles/file/leziluwazajukewemutab.pdfIn PDF document text
    • https://www.avenueroadadvertising.com/wp-content/plugins/formcraft/file-upload/server/content/files/1614684a28c109---56109645913.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/A3Ryygt5BCM/uplcv?utm_term=world+cricket+championship+3+mod+apk+free+downloadPDF 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_off0000ce21.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCE21 11228 bytes
SHA-256: aa1de3ee8a89ca5055e8ea659184e45c1559384c9ada49dc8f85a6b3602697fd
font_01_sfnt_off0000e84c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE84C 17580 bytes
SHA-256: 68ecffbe113f0b38ddc7703c3ec5647576cbd786380eb2b2432f354abf0f5e28
font_02_sfnt_off00011589.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11589 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1