Malicious PDF — malware analysis report

Static analysis result for SHA-256 9ddef16ba081fb84…

MALICIOUS

PDF

100.5 KB Created: 2021-07-31 17:06:13 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: bb09d4842b1a5cdd1a414a692928ea04 SHA-1: c87fda0769235b576090507d83e7fe6bd3c193f3 SHA-256: 9ddef16ba081fb84b3ebda7fedbc16ecab60416ba383a941917fd730baac6b19
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains numerous external links, many pointing to compromised WordPress sites, suggesting it functions as a link farm to distribute further malicious content or phish users. The presence of embedded URLs and the nature of the heuristics strongly suggest this document is part of a phishing campaign, likely delivered as a spearphishing attachment.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9971

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://pistant.ru/uplcv?utm_term=how+to+download+baldi+basics PDF link annotation
    • http://hattrick-sports.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b83b07e425e---49318014268.pdfIn PDF document text
    • https://10glazsikeyrosa.ru/file/14341501661.pdfIn PDF document text
    • https://projectmine.hu/ckfinder/userfiles/files/zisufonamed.pdfIn PDF document text
    • http://chayka-svg.ru/files/99559689133.pdfIn PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bbb1ca1731a---93713496780.pdfIn PDF document text
    • http://www.medical-psychology.gr/wp-content/plugins/formcraft/file-upload/server/content/files/160d3dafbb597d---jamupozaf.pdfIn PDF document text
    • https://brtim.com/uploads/wysiwyg/files/34117002949.pdfIn PDF document text
    • http://diplomat2014.ru/ckfinder/userfiles/files/85472562074.pdfIn PDF document text
    • http://mazdooradda.com/userfiles/file/58255193481.pdfIn PDF document text
    • https://promise-land.com/upload/file/nizeladigizopek.pdfIn PDF document text
    • https://www.enviedecrire.com/wp-content/plugins/formcraft/file-upload/server/content/files/16093dfaab763e---basugavusuzun.pdfIn PDF document text
    • http://www.phonefixcomo.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b5d3c2cd747---juvebeduvogubuvuxujik.pdfIn PDF document text
    • https://123kozijnofferte.nl/wp-content/plugins/super-forms/uploads/php/files/0vuraobho2rmnmesu9aur0aeq5/13621608448.pdfIn PDF document text
    • http://www.liveartsaskatchewan.com/wp-content/plugins/formcraft/file-upload/server/content/files/160fc5d165f85b---77325415536.pdfIn PDF document text
    • http://terredellamagnagrecia.com/userfiles/files/jikuwivuzowidugi.pdfIn PDF document text
    • http://limpiasol.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609b5297b554c---84326986220.pdfIn PDF document text
    • https://www.sidertest.it/wp-content/plugins/formcraft/file-upload/server/content/files/160986b818c49e---28661082781.pdfIn PDF document text
    • http://www.catalogodecineargentino.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608bf273dfec4---93890527694.pdfIn PDF document text
    • http://creativeindustries.ru/uploads/userfiles/file/36101582562.pdfIn PDF document text
    • https://travelselection.us/wp-content/plugins/formcraft/file-upload/server/content/files/160c7b4424326e---73832542702.pdfIn PDF document text
    • https://www.abaco-engineering.it/wp-content/plugins/formcraft/file-upload/server/content/files/160956eafcd241---tarebebexoxivigoti.pdfIn PDF document text
    • http://sieuthibds.net/images/files/norazupaniwapov.pdfIn PDF document text
    • https://kamber.dk/wp-content/plugins/super-forms/uploads/php/files/ef221f743eea632997d65199fe207ea0/72730935292.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f84c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF84C 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0001105e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1105E 26344 bytes
SHA-256: ec5acc351f673405cb2e94e01d2ddbddd96a74ff83ca2ec0bd4aed4466a5840f
font_02_sfnt_off0001510a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1510A 17996 bytes
SHA-256: 533cb5f09fe85a6b93ab49e4e89b85102500de67d59ec532fbf6d3595d50809d
font_03_sfnt_off00016c38.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x16C38 10348 bytes
SHA-256: 9ed27a2257b1187befa9b54cb14c46a3128ba272056b5fd9ae8796d74ba91da1

Open this report in the interactive analyzer, or submit your own file for analysis.