Malicious PDF — malware analysis report

Static analysis result for SHA-256 ce1778caf1a003dd…

MALICIOUS

PDF

85.4 KB Created: 2021-09-03 07:54:13 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-02
MD5: becd8bb0ab8d1e5c16dbeb30fedda7f2 SHA-1: 15e50c08c9a49a50bfda48034b3230061f9d82a3 SHA-256: ce1778caf1a003ddafaa6f3a4eb7e2ef9071f2fdf86729abeabc5b02438dd403
156 Risk Score

Malware Insights

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

The file is identified as malicious by ML classifiers and ClamAV, indicating a phishing or trojan threat. It contains a link farm pointing to numerous URLs, many hosted on compromised WordPress sites or disposable domains, suggesting an attempt to redirect users to malicious content. The PDF structure and embedded URLs strongly indicate a phishing attack pattern.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9964

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://cructi.ru/uplcv?utm_term=stargazing+with+binoculars+pdf PDF link annotation
    • http://baovephuongtroi.com/vietkiendo/upload/file/93826303451.pdfIn PDF document text
    • https://psychotherapie-dr-albrecht.de/wp-content/plugins/formcraft/file-upload/server/content/files/1607a27bcd4fe5---wiwimid.pdfIn PDF document text
    • http://www.olympussverige.se/wp-content/plugins/super-forms/uploads/php/files/a1d3mun7dlev3jlqrpapcdpvef/14618415721.pdfIn PDF document text
    • http://bibliotekaludwin.pl/img/upload/files/boxotolukibopegajap.pdfIn PDF document text
    • https://www.olympusnorge.no/wp-content/plugins/super-forms/uploads/php/files/e8489shd8b1fqe26h1henl25mm/rizowogewakawuxatoloj.pdfIn PDF document text
    • http://nextgt.eu/uploads/file/numedewumogag.pdfIn PDF document text
    • http://twxcd.com/img-aim/files/fiwafudewoki.pdfIn PDF document text
    • https://rjiminfra.com/wp-content/plugins/super-forms/uploads/php/files/aa591a49b7ac20b8aaa7cff65d536a2e/22025302394.pdfIn PDF document text
    • http://www.magicapro.it/wp-content/plugins/formcraft/file-upload/server/content/files/1608487a36baf1---muwodobaru.pdfIn PDF document text
    • http://abwingssuffolk1.com/uploads/files/luxijigerodotejopipason.pdfIn PDF document text
    • http://ozdesignhouse.com/app/webroot/uploads/files/90448726254.pdfIn PDF document text
    • http://amoy-art.com/Upload/file/xejaxabugojojovad.pdfIn PDF document text
    • https://coop-alternatives.fr/images/images/pedadazikuwifivoj.pdfIn PDF document text
    • https://bluebeakbranding.com/wp-content/plugins/super-forms/uploads/php/files/6aa6c2837980b05b43ad18a7d705ccfc/xibusemizovilegisadiron.pdfIn PDF document text
    • http://maketmaster.ru/admin/ckfinder/userfiles/files/walolanaxusege.pdfIn PDF document text
    • http://bafiti.com/sklep/userfiles/file/gejamew.pdfIn PDF document text
    • http://www.mostenpo.jp/userfiles/files/larobagesedez.pdfIn PDF document text
    • http://argol-editions.fr/userfiles/file/nefigogekane.pdfIn PDF document text
    • http://banning64reunion.com/clients/a/a7/a71e9339640f4be667ed55590a288245/File/81187408482.pdfIn PDF document text
    • https://parkettworld.com/upload/files/ripiwomavozil.pdfIn PDF document text
    • http://bamor.org/userfiles/file/tesowatojalokisufefo.pdfIn PDF document text
    • https://agrotehholding.ru/wp-content/plugins/super-forms/uploads/php/files/5e3bad2750163c32de92e1f7e3a2c04c/70912223282.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_off0000e634.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE634 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000fe46.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFE46 18652 bytes
SHA-256: cc3e8d9de3ab5c69791449795a476f7548f6b3aac2a512315c65bd4d5ce023d6
font_02_sfnt_off00012e90.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12E90 11228 bytes
SHA-256: b7031f34b35b97e467c00f945f898e9f25085652095d8f2509fbe51aaa041605

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