Malicious PDF — malware analysis report

Static analysis result for SHA-256 32241732307830a2…

MALICIOUS

PDF

131.1 KB Created: 2021-07-22 23:12:46 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: d6f4196c1d14c6946093143dd3bfba9a SHA-1: 1ff441a62f0fbbd8687cfd98790defdfafd8655b SHA-256: 32241732307830a2f51958749523687b64308e5cd4ffe08081b66a31ac373219
156 Risk Score

Malware Insights

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

The PDF file was flagged as malicious by ClamAV and an ML classifier. Heuristics indicate it functions as a link farm, pointing to multiple compromised WordPress upload directories and disposable hosting sites. The embedded URLs suggest an attempt to direct users to potentially malicious or phishing content, masquerading as legitimate documents.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9967

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://www.heainc.com/wp-content/plugins/formcraft/file-upload/server/content/files/160adbd0ea7a95---ragisudeja.pdf In PDF document text
    • http://maxtarget.by/ckfinder/userfiles/files/98969949203.pdfIn PDF document text
    • https://klingende-zeder.de/wp-content/plugins/formcraft/file-upload/server/content/files/16099f1681954e---jufibitibejenujeb.pdfIn PDF document text
    • https://estoniapools.com/contents//files/23620932008.pdfIn PDF document text
    • http://kleinschaden.expert/userfiles/file/95932568511.pdfIn PDF document text
    • https://jgmurphy.com/wp-content/plugins/super-forms/uploads/php/files/0e524e70ae7271d94005e9dd47b2753c/19240771284.pdfIn PDF document text
    • https://seeandhearbetter.ie/img/shop//contents/63515798914.pdfIn PDF document text
    • http://kaufdeinauto.de/wp-content/plugins/formcraft/file-upload/server/content/files/16094bd16e1f78---temokuwuge.pdfIn PDF document text
    • https://amalighting.com/wp-content/plugins/super-forms/uploads/php/files/a1194a836895c3365eee090f574c243d/rakemuvapofabokanemaz.pdfIn PDF document text
    • http://www.cascinasorigherio.it/wp-content/plugins/formcraft/file-upload/server/content/files/160d0a00be5a4d---wutikuborav.pdfIn PDF document text
    • https://www.cedicar.com/wp-content/plugins/formcraft/file-upload/server/content/files/16079174e34c7b---guwivamozizulaguvumosif.pdfIn PDF document text
    • http://teamwork-poetschke.com/ckfinder/userfiles/files/52781962623.pdfIn PDF document text
    • http://unesco-mediain.cz/fckfiles/file/vuxusomuzuwoxu.pdfIn PDF document text
    • http://sushikyototogo.com/uploads/files/zupolilatosevesobi.pdfIn PDF document text
    • https://www.dyna-tech.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160ede9dbe8f57---bugosobivozev.pdfIn PDF document text
    • http://polletnv.be/uploads/files/22268743324.pdfIn PDF document text
    • http://bscartridge.com/pic/nolepo.pdfIn PDF document text
    • https://leunamgroup.com/wp-content/plugins/super-forms/uploads/php/files/b35602e3a8c1f6ade434f223a4ff30d3/jubojidig.pdfIn PDF document text
    • http://kadh.kr/bobod/upload/file/kapelepineduxugu.pdfIn PDF document text
    • http://subventionsbetrug.de/wp-content/plugins/super-forms/uploads/php/files/5v5a8f2vv723la0fmiog3ev1ek/gobikokifix.pdfIn PDF document text
    • http://sam-global.info/files/file/40530184871.pdfIn PDF document text
    • https://poolpoint.be/uploads/file/xusigexuwa.pdfIn PDF document text
    • http://9262895.ru/ckfinder/userfiles/files/33758141462.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/BvfzZFkJO3s/uplcv?utm_term=double+revolving+field+theory+pdfPDF 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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0001824c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1824C 10868 bytes
SHA-256: 205475ad781920e67de3e9f8ce46d2ce59a44e7f09ec104e129ad6aed93a1222
font_01_sfnt_off00019ae1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x19AE1 18924 bytes
SHA-256: 873689f31c35f587a91202587714565c557af793400555b31a14f000dd058543
font_02_sfnt_off0001ccf8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1CCF8 16748 bytes
SHA-256: 5a210aea9da9f57e5157524265b0bf94478446381f1f8758ee3c08c3340ba02e
font_03_sfnt_off0001e509.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1E509 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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