Malicious PDF — malware analysis report

Static analysis result for SHA-256 0bdd0e67e7af97a3…

MALICIOUS

PDF

88.8 KB Created: 2021-07-18 05:05:25 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: 2e0e37c60babbf34bb8999dc4f4c260a SHA-1: 3a0928337796ed066a194eba69636caf5f86a371 SHA-256: 0bdd0e67e7af97a328485976ff97c73863dbe9cbca0bf2457837b39c8cc6429f
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 User Execution: Malicious File

The PDF file was flagged by ML classifiers and ClamAV as malicious, indicating a high likelihood of malicious intent. Heuristics identified it as a link farm pointing to compromised WordPress upload storage and disposable hosting, suggesting it's designed to redirect users to potentially harmful external sites. No scripts were extracted, but the structure and URL patterns are consistent with phishing or malware distribution lures.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9964

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://vizugy.hu/uploads/files/files/bafufofosofonurot.pdf In PDF document text
    • https://vuaship.com/wp-content/plugins/super-forms/uploads/php/files/7b4h0ddam5kt3b76al435geo9e/mabupimajutuviguvu.pdfIn PDF document text
    • https://expresstestingatl.com/wp-content/plugins/super-forms/uploads/php/files/81f84128bcf678ba6eb887f736fdf873/75433480233.pdfIn PDF document text
    • https://mikepromedia.com/wp-content/plugins/super-forms/uploads/php/files/dh04gs6snji0m2592o2at9mgg7/tovasetanejududivedasodo.pdfIn PDF document text
    • https://postscriptproductions.com/wp-content/plugins/formcraft/file-upload/server/content/files/16083ab29d3126---vepinad.pdfIn PDF document text
    • http://dentalclinicbangalore.com/uploads/11181809538.pdfIn PDF document text
    • http://compie.ru/wp-content/plugins/formcraft/file-upload/server/content/files/1606fa8fba09c9---55657599079.pdfIn PDF document text
    • https://www.popcaffe.it/wp-content/plugins/super-forms/uploads/php/files/caa1cd51f57f6ebd03578e8f40fb90bc/vavevapabezokilulozif.pdfIn PDF document text
    • https://kfz-gutachter-oliver-schiller.de/wp-content/plugins/formcraft/file-upload/server/content/files/160aba2b67659d---66580693459.pdfIn PDF document text
    • http://www.anclupnapoli.it/userfiles/file/pigikivuvuloloxevopaxo.pdfIn PDF document text
    • https://mdteam.se/ckfinder/userfiles/files/13324747421.pdfIn PDF document text
    • http://canxetaianhduc.com/images/file/86096651195.pdfIn PDF document text
    • https://www.grecosalesinternational.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609ef5da2e703---60093770071.pdfIn PDF document text
    • http://sieuthibongda.net/ckfinder/userfiles/files/79787549468.pdfIn PDF document text
    • https://www.sudburyhighspeedinternet.ca/wp-content/plugins/super-forms/uploads/php/files/256a09a307798592fe74c521cb2bcc30/76794293161.pdfIn PDF document text
    • http://jockmurray.com/wp-content/plugins/formcraft/file-upload/server/content/files/160703fbd8af9d---rezorixomukavegumare.pdfIn PDF document text
    • http://abapaposentados.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160e73a98e4583---34683504777.pdfIn PDF document text
    • http://asalsold.com/wp-content/plugins/formcraft/file-upload/server/content/files/160cac357237d3---55638235202.pdfIn PDF document text
    • https://rowanmkt.com/Uploads/ckfinder/userfiles/files/77400870195.pdfIn PDF document text
    • https://www.pennlighting.com/wp-content/plugins/super-forms/uploads/php/files/47a0c62edef553364a92ff363f1778fc/watuwodepisove.pdfIn PDF document text
    • https://muguet.fr/sites/default/files/file/69458058143.pdfIn PDF document text
    • http://www.festivalmarrakech.info/wp-content/plugins/formcraft/file-upload/server/content/files/1608b2a1509f02---suxalopofurew.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/1xuhb7AK25c/uplcv?utm_term=how+to+get+the+fire+upgrade+cold+warPDF 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_off0000f41c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF41C 18056 bytes
SHA-256: 548ef8ac4d9482e9a0bca1f8abb445d02e2ebe1974761fff6099b3e3ad42ee48
font_01_sfnt_off00012385.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12385 10804 bytes
SHA-256: 06ee67dc0e6a210db053d059fc8e557a00dacd68ceeddb888b0ff7bfd40e165d
font_02_sfnt_off00013c60.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13C60 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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