Malicious PDF — malware analysis report

Static analysis result for SHA-256 d686df7493148932…

MALICIOUS

PDF

80.5 KB Created: 2021-09-04 07:57:23 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: 2c00c0daca8f523228bdd873c5b11f16 SHA-1: a452cb14d1451a2874cad2acc628ef5c36236d84 SHA-256: d686df74931489325e46ea9c7952134ccb39fecc68bbddea3d1230eb1907f068
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was identified as malicious by ML classifiers and ClamAV, specifically as a phishing trojan. It contains numerous links pointing to various websites, some of which are hosted on compromised CMS uploads, indicating a link farm or redirection strategy. The embedded URLs and the nature of the heuristics suggest an attempt to direct users to malicious or phishing sites, likely as part of a broader phishing campaign.

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://chickendaylacrescenta.com/uploads/files/13036440804.pdf In PDF document text
    • https://brahmagnanam.org/fck_uploads/file/luren.pdfIn PDF document text
    • http://drsuthichai.com/userfiles/files/nijatekas.pdfIn PDF document text
    • https://bilbox.es/wp-content/plugins/super-forms/uploads/php/files/50b65ea50a0def4c29bcc08ef46612c6/fedas.pdfIn PDF document text
    • https://foundryindia.org/userfiles/file/zizisulojabifegimufutusen.pdfIn PDF document text
    • http://s8radziejowice-paszkow.pl/userfiles/file/lerodufiv.pdfIn PDF document text
    • http://mmdplus.com/userfiles/files/20210801_155114.pdfIn PDF document text
    • https://agrachoff.ru/wp-content/plugins/super-forms/uploads/php/files/48652bc033cffa301690c81165ffb80b/643335350.pdfIn PDF document text
    • https://sketchup360.vn/wp-content/plugins/super-forms/uploads/php/files/okfemtiolmoplou4hvbpgsmknt/pepetijuxoge.pdfIn PDF document text
    • http://www.neslihanonur.com/wp-content/plugins/super-forms/uploads/php/files/fc25cb324b0ade71da2fa72e33ec9984/liposemolefika.pdfIn PDF document text
    • http://www.jesuseslaroca.org/wp-content/plugins/formcraft/file-upload/server/content/files/1608ead2d6d659---73839607366.pdfIn PDF document text
    • https://divinesacredshakti.com/wp-content/plugins/super-forms/uploads/php/files/7d9e89a0418cfd1f2d595e12c81b82e9/paxosepuworax.pdfIn PDF document text
    • http://www.itbaloch.com/wp-content/plugins/formcraft/file-upload/server/content/files/160baa4f11a97f---wufuzufiluxemasalozoxoji.pdfIn PDF document text
    • http://ubytovna-krumlov.cz/userfiles/file/velexemolovumiwezilikali.pdfIn PDF document text
    • http://www.serge-valentin.net/ckfinder/userfiles/files/sumaj.pdfIn PDF document text
    • https://bandotrading.it/uploads/file/tesiliwalevelewugofesodop.pdfIn PDF document text
    • http://onnetsolution.in/userfiles/file/lologixubep.pdfIn PDF document text
    • http://maslag.eu/userfiles/file/topekirimisejuzujanez.pdfIn PDF document text
    • http://sorokolaw.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/xewujibozupedotosek.pdfIn PDF document text
    • http://smepil.com/ckeditor/userfiles/files/1870020289.pdfIn PDF document text
    • https://bettenbaehren.de/wp-content/plugins/formcraft/file-upload/server/content/files/16094a0b437007---94143291287.pdfIn PDF document text
    • https://expresstestingatl.com/wp-content/plugins/super-forms/uploads/php/files/a7ea01d349f940bd09a398486805e62b/jixagage.pdfIn PDF document text
    • https://nceptionsolutions.com/wp-content/plugins/super-forms/uploads/php/files/ac77e500f4271402b3026b0c62f1ffed/kofov.pdfIn PDF document text
    • http://penzionklara.cz/userfiles/file/wemaxapagitiwigom.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/zMnd8XtcwSM/uplcv?utm_term=computer+hardware+parts+pdf+filePDF 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_off0000d5db.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD5DB 17380 bytes
SHA-256: bb249b8f8cfc6c448b388834e6ac5683ba6616bcdf33bc69dc7ac953534a096e
font_01_sfnt_off00010304.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10304 10876 bytes
SHA-256: 49d3a2ce56159379e77f5d277c28644d6bd45420f0b0564ea33bc1aa0562d2f9
font_02_sfnt_off00011c3d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11C3D 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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