Malicious PDF — malware analysis report

Static analysis result for SHA-256 bd04ddc92236215c…

MALICIOUS

PDF

87.0 KB Created: 2021-09-06 09:50:57 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-05
MD5: 35f34d3bd45b8feff838b568422a2786 SHA-1: bd3fd913b481229caa42754f471ae569e788ca56 SHA-256: bd04ddc92236215c0e2b5645447279a06672e542688c785ae0c0d5191589d327
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF file was identified as malicious by ML classifiers and ClamAV, indicating a phishing or malware distribution attempt. The document functions as a link farm, containing numerous external URIs that point to potentially compromised websites or disposable hosting. These links are likely intended to lure users to malicious sites for further exploitation or credential harvesting.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9942

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 https://oniceh.ru/uplcv?utm_term=foxit+phantompdf+editing+text PDF link annotation
    • http://normel.org/files/upload/file/49938635277.pdfIn PDF document text
    • http://springswellness.net/wp-content/plugins/formcraft/file-upload/server/content/files/16081fc9abc4f9---xilari.pdfIn PDF document text
    • https://dafelia.com/files/nokisodirisokamidoxap.pdfIn PDF document text
    • https://kimcert.org/E/file/4962639306.pdfIn PDF document text
    • https://bucatariizidite.ro/printuri-fi/files/17207895779.pdfIn PDF document text
    • https://henseltech.cz/userfiles/file/82701096538.pdfIn PDF document text
    • https://kalatranslation.co.uk/wp-content/plugins/super-forms/uploads/php/files/rt688ops8e9qn9s44mhu9moqtk/13202131319.pdfIn PDF document text
    • https://hotelristorantenovecento.it/wp-content/plugins/super-forms/uploads/php/files/78262afe61e07676eced49987b2fa919/87239765426.pdfIn PDF document text
    • http://immopolignano.lu/images/tomezadanogamiromizu.pdfIn PDF document text
    • https://observatoire-omic.org/documents/file/8358942350.pdfIn PDF document text
    • https://zoorichi.com/temp/fckeditor/file/23248121120.pdfIn PDF document text
    • http://claudiodauelsberg.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160aae68cf3efa---zavutetalax.pdfIn PDF document text
    • http://aimic.com/userfiles/file/87779051645.pdfIn PDF document text
    • http://orvosvalaszto.hu/uploads/files/84724331609.pdfIn PDF document text
    • https://airbays.com/userfiles/file/vigivimumewilalijexozot.pdfIn PDF document text
    • http://findmecakes.com/userfiles/files/pemofuvuxudixozirogope.pdfIn PDF document text
    • http://www.lifestaralberta.com/wp-content/plugins/formcraft/file-upload/server/content/files/16085918da5f0a---roginalodaset.pdfIn PDF document text
    • https://dildendilecevirievi.com/upload/ckfinder/files/rudos.pdfIn PDF document text
    • https://www.indee-r.fr/wp-content/plugins/super-forms/uploads/php/files/ddaf3cfd58421ffb146e6274a8654072/vazobajezimelori.pdfIn PDF document text
    • http://agataklimowska.pl/userfiles/file/bikeban.pdfIn PDF document text
    • http://omniatel.it/wp-content/plugins/formcraft/file-upload/server/content/files/160832e7adda42---55272900366.pdfIn PDF document text
    • https://revapackers.com/wp-content/plugins/super-forms/uploads/php/files/s4dapadkgg8gimtdt6bcng9si8/32371928064.pdfIn PDF document text
    • https://ichibaninfotech.com/ckfinder/userfiles/files/64649132983.pdfIn PDF document text
    • https://autonoleggioassereto.com/file/foxem.pdfIn PDF document text
    • http://exclusivelimoservice.com/ckfinder/userfiles/files/sijujiguluzebonexopu.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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ed3a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xED3A 10712 bytes
SHA-256: ab550c32090dedb3604627cd3ecd1a01eca628e2653f3bf62789356a5b86ba16
font_01_sfnt_off0001056c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1056C 19296 bytes
SHA-256: 10204a79d042d7f76875b6fd6dfbd8a9f60db83f0acaafed67596deee7530b60
font_02_sfnt_off000136ba.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x136BA 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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