Malicious PDF — malware analysis report

Static analysis result for SHA-256 3ae0cc32a0082f2c…

MALICIOUS

PDF

87.8 KB Created: 2021-06-27 02:27:31 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-08-20
MD5: ec58460fb7c344167ef08bd592d4cff2 SHA-1: d0831b93c113b7d5681f9c844222a17733a5bb74 SHA-256: 3ae0cc32a0082f2c43cac018babc17de0d13dcf2cdd54eb9b82d5775269ea974
156 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It functions as a link farm, directing users to multiple compromised websites and disposable hosting domains, likely for phishing or malware distribution. The presence of numerous external URIs and link farm heuristics strongly suggests an attempt to exploit users through deceptive links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9952

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://synerhu.ru/uplcv?utm_term=how+to+open+pack+a+punch+ascension PDF link annotation
    • http://smolensk-bakaleya.ru/userfiles/file/xolep.pdfIn PDF document text
    • http://rajakedua.com/contents//files/45377933160.pdfIn PDF document text
    • https://www.rydalmereprestige.com.au/wp-content/plugins/super-forms/uploads/php/files/164m5s1ql3bbd357hp436f3gvk/13209882534.pdfIn PDF document text
    • https://juvelyrikoscentras.lt/Files/file/56076804982.pdfIn PDF document text
    • https://popa.com.br/wp-content/plugins/super-forms/uploads/php/files/26fadf5bcbb63247f5814c48c5916199/57223690916.pdfIn PDF document text
    • https://www.frankreich-ferien.ch/wp-content/plugins/formcraft/file-upload/server/content/files/160cc40099d4f3---45993159360.pdfIn PDF document text
    • http://rufullthrottle.com/wp-content/plugins/formcraft/file-upload/server/content/files/16086cf2b623e9---51026969246.pdfIn PDF document text
    • https://westcoastmovers.ca/wp-content/plugins/super-forms/uploads/php/files/shct9b2ggitentuqaoud2mbrm6/tiditogikuw.pdfIn PDF document text
    • http://ubest.ru/images/file/dofexova.pdfIn PDF document text
    • https://mrmusicfoundation.org/wp-content/plugins/super-forms/uploads/php/files/n2fh0d31du5ale08av0df0v6ks/kovukevolopaz.pdfIn PDF document text
    • http://stroynerud-sm.ru/wp-content/plugins/formcraft/file-upload/server/content/files/1607ffa7e5e37d---61051668844.pdfIn PDF document text
    • https://amalighting.com/wp-content/plugins/super-forms/uploads/php/files/c82ab0da2a7ee7b5cbf2e5efdf127c9e/xitubatitumabimekum.pdfIn PDF document text
    • https://saftanton.dk/wp-content/plugins/formcraft/file-upload/server/content/files/160a5cc65be744---puvobikinupineti.pdfIn PDF document text
    • http://www.segurosfacility.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160a2693556278---26591254150.pdfIn PDF document text
    • https://purebodycare.courses/wp-content/plugins/super-forms/uploads/php/files/vqo4fs814o5k6fhr1vatv06he5/13956125873.pdfIn PDF document text
    • http://sattosushi.com/uploads/files/difisusujuzosamubegoduluv.pdfIn PDF document text
    • https://medok18.ru/wp-content/plugins/super-forms/uploads/php/files/01bbfacec9dcf1dcf45494413bdbceb8/94832267155.pdfIn PDF document text
    • https://avis-medical.ma/wp-content/plugins/super-forms/uploads/php/files/5665bdaaf3e6dad219602222dc8caf56/96502758199.pdfIn PDF document text
    • http://broadgatecapital.com/userfiles/file/zusofi.pdfIn PDF document text
    • http://akinmedikal.com/uploads/file/73929953216.pdfIn PDF document text
    • https://shayangroup.net/wp-content/plugins/super-forms/uploads/php/files/5fca80789d06472dcbf268868424ac81/99085335688.pdfIn PDF document text
    • https://inncredel.com/uploads/gimamuzegiz.pdfIn PDF document text
    • http://clearlakesd.org/wp-content/plugins/formcraft/file-upload/server/content/files/160d0ccc626069---tosoxudodatoxowiforozu.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f286.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF286 17988 bytes
SHA-256: b852841e44ca5db6982d0ecb8b20c19045a2949b2a89cbadf66f11ac3e56db91
font_01_sfnt_off000121b3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x121B3 10596 bytes
SHA-256: a3b55c0d742f3bc309f9e1d102cae3af039f4254e5c156b760c491f71d39845c
font_02_sfnt_off000139f0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x139F0 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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