Malicious PDF — malware analysis report

Static analysis result for SHA-256 b0e5e7c46dd9f5a5…

MALICIOUS

PDF

89.9 KB Created: 2021-06-30 20:51:10 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 75741a754b40085521eb10d2c53679c4 SHA-1: 30064d8eae412b264869cbc27f672ff333a7c366 SHA-256: b0e5e7c46dd9f5a5df36f1790c5dab7f4b215d627c16774bfd3d68e366f7e03b
156 Risk Score

Malware Insights

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

The PDF contains numerous external URIs and link farm heuristics, indicating it's designed to redirect users to compromised websites. The ClamAV detection and ML classifier strongly suggest malicious intent, likely for phishing or malware delivery. No scripts were extracted, but the structure points to a malicious link farm.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9946

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://krisoc.ru/uplcv?utm_term=army+medical+college
    • https://amenagementsoleil.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c03aea5d96d---93710302256.pdf
    • https://oversaslogistica.it/file/7128976540.pdf
    • https://charteriraq.ir/basefile/charteriraqir/files/67988584913.pdf
    • https://readxyz.org/wp-content/plugins/super-forms/uploads/php/files/b6a9e8eb248544611eb733d62775ca8b/28611397939.pdf
    • https://www.geosuiteonline.de/wp-content/plugins/formcraft/file-upload/server/content/files/160a237782bfb4---xexesoje.pdf
    • https://www.financedeclined.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/1607b908bd736b---nimizaredivopoxazo.pdf
    • https://www.18fire.com/wp-content/plugins/super-forms/uploads/php/files/a36ed6b750183c416717cbfa53457afa/56477955919.pdf
    • https://thehamptonsbloomington.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608fca2e43298---karaxuvagafikupabi.pdf
    • https://mattweidnerlaw.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b6c7c3893ad---rosoxujiromofezejawudi.pdf
    • http://www.infranetltd.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ac25305687f---65821353061.pdf
    • https://www.hontoys.com.au/wp-content/plugins/super-forms/uploads/php/files/r8ipu145a1t50udjunosfeijta/kekudipelolow.pdf
    • http://clear-es.net/yamituki-n/uploads/files/59213665448.pdf
    • https://www.heracles-hotel.eu/wp-content/plugins/super-forms/uploads/php/files/2ov4618e95kng4pef1mrbvum08/dofekixasarapunoluvala.pdf
    • http://unipell.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/16093c91d28a5e---50622471674.pdf
    • http://irmascaritasdejesus.org.br/wp-content/plugins/formcraft/file-upload/server/content/files/16096ae3bb76d4---83361245742.pdf
    • http://alphabodysupplements.com/newerac2c/userfiles/file/rukilunajafegago.pdf
    • https://mymango.ru/wp-content/plugins/super-forms/uploads/php/files/f6b2f08aa4f82f5ff7d05ae8e58cb3fa/8836402014.pdf
    • http://ednak.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c6c041ccd14---53884837517.pdf
    • http://www.sbawerribee.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160aa219b7a21c---xegutar.pdf
    • https://eliteswimmingpoolsinc.com/wp-content/plugins/super-forms/uploads/php/files/thr3tmgcb9itg8k4rabs4f0tb4/56663712385.pdf
    • https://www.helpagesl.org/wp-content/plugins/formcraft/file-upload/server/content/files/160ab3fd077e4b---72841878968.pdf
    • https://k-kompany.ru/wp-content/plugins/super-forms/uploads/php/files/e8efca5ca8794236449683bf5d3f0316/56010267374.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e69c.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE69C 16792 bytes
font_01_sfnt_off0000feb3.bin
10541e038dba9f0ba5b371a5542c25c985fa8a1a04b58d09765192e681a5bff8		 pdf-font-stream PDF embedded font (sfnt) at offset 0xFEB3 10440 bytes
font_02_sfnt_off00011623.bin
2b23956678d7f0d9aba7d850641a1609abe73a0f300d108affd0360b7e9f0202		 pdf-font-stream PDF embedded font (sfnt) at offset 0x11623 16364 bytes
font_03_sfnt_off00012cac.bin
404d8ef1d81c0618d639850810227bdacd6702d61ff4c42de55b0712ced09ede		 pdf-font-stream PDF embedded font (sfnt) at offset 0x12CAC 17356 bytes

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