Malicious PDF — malware analysis report

Static analysis result for SHA-256 9be85566b9facd40…

MALICIOUS

PDF

86.8 KB Created: 2021-08-12 14:33:46 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26
MD5: 96c026baedb88d828e6c72773fa6c560 SHA-1: e4e2ce4366cdbde8333c5a155e131d6502c01c54 SHA-256: 9be85566b9facd40c8d10967e37d03a73780362f4b8a401143c581e311037eff
156 Risk Score

Malware Insights

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

The sample was detected as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. It contains numerous links pointing to compromised WordPress sites and disposable hosting, suggesting it functions as a link farm to distribute further malicious content or phishing lures. The presence of external URIs and link farm heuristics strongly supports this attack pattern.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9973

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://neoville.ru/wp-content/plugins/super-forms/uploads/php/files/636e34c905f0aa181d2f0c27177cf62a/dezogepowegejuwexafamow.pdf In PDF document text
    • https://digireg.dk/upload/6605590235.pdfIn PDF document text
    • http://salonlomi.pl/wp-content/plugins/formcraft/file-upload/server/content/files/160a8f09f9a823---dipeweribusi.pdfIn PDF document text
    • https://deewo.de/wp-content/plugins/formcraft/file-upload/server/content/files/160904972d7871---pumipulexemozodigimo.pdfIn PDF document text
    • https://optical-axis.com/uploads//files/202108091847013482.pdfIn PDF document text
    • https://firsatoyun.com/calisma2/files/uploads/busokopon.pdfIn PDF document text
    • http://www.itbaloch.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607701484948f---lanubadejunikuzigejej.pdfIn PDF document text
    • http://angeladaniel.eu/uploads/files/21092563935.pdfIn PDF document text
    • https://www.sgestrecho.es/wp-content/plugins/formcraft/file-upload/server/content/files/1607246b6db3a7---75368700671.pdfIn PDF document text
    • http://nd-58.ru/wp-content/plugins/super-forms/uploads/php/files/f3a166a71f4e643d8e1c1107bfe505e3/48365611412.pdfIn PDF document text
    • https://3dreamvr.com/wp-content/plugins/super-forms/uploads/php/files/ea061ce18a8d82f59d4c9795af643542/nikaguligovabizafuwewox.pdfIn PDF document text
    • http://www.bewegeninarnhem.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160f9dd070fa06---raxitazabunoputoneze.pdfIn PDF document text
    • http://kevinmcallisterlaw.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/sepozi.pdfIn PDF document text
    • https://birudongker.com/contents//files/kufiravimebokofakoxa.pdfIn PDF document text
    • http://commune-bourre.com/userfiles/file/worevelalakuduw.pdfIn PDF document text
    • https://gamletaarnhuset.no/wp-content/plugins/formcraft/file-upload/server/content/files/16085f8bb34083---41920691681.pdfIn PDF document text
    • http://hz-karavany.cz/ckfinder/userfiles/files/60171743987.pdfIn PDF document text
    • https://action-roofing.com/wp-content/plugins/super-forms/uploads/php/files/835d1aa6b96b7235cd57c6a2f595f6f8/7150577075.pdfIn PDF document text
    • https://dukra.sk/editor_uploads/files/bipubekofuwa.pdfIn PDF document text
    • https://avela.md/userfiles/file/lamopasifagudop.pdfIn PDF document text
    • https://laneopx.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608d2081da008---34105029685.pdfIn PDF document text
    • http://artetendasud.it/userfiles/files/gepozoginuzuxuzininufig.pdfIn PDF document text
    • https://sk-developers.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c546723e774---jexubarubilubirak.pdfIn PDF document text
    • https://www.escon.it/wp-content/plugins/super-forms/uploads/php/files/308567b269d6fd8d2ec5f90db1debbec/punerifoles.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/BkSY9tpko7c/uplcv?utm_term=how+to+get+gacha+life+on+laptop+for+freePDF 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_off0000eff0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEFF0 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off00010807.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10807 10668 bytes
SHA-256: e41e29312a393be7717866ffba1f35b0d27c2fb00f1be041df1d4b6344fcf972
font_02_sfnt_off00012063.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12063 16664 bytes
SHA-256: e84115b1abac39cfedb4b4768e6d13b6450bc07c86594018c6c74058b7c87987

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