Malicious PDF — malware analysis report

Static analysis result for SHA-256 96ceb717a9cc43aa…

MALICIOUS

PDF

94.1 KB Created: 2021-07-26 11:01:54 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 943fe8b91885de4a8aa2afde03561513 SHA-1: 0f508b22a6fdf975eb67277927ed58adfd5fc325 SHA-256: 96ceb717a9cc43aa155dcd330be2575b760db52090ac98a0edf80d58c6de0e2b
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.001 User Execution: Malicious Link

The file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. Heuristics identified it as a link farm on disposable hosting, with numerous URLs pointing to compromised CMS uploads and potentially malicious content. The document body is heavily obfuscated and unreadable, suggesting it's designed to obscure its true purpose, which is likely to redirect users to malicious sites for phishing or further malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9990

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://concertwristband.com/resimler/files/51422237003.pdf
    • http://dom-nenilovo.ru/wp-content/plugins/super-forms/uploads/php/files/8478fb97972741e7fa476b36f2adccc6/kafaworagunapinixazozur.pdf
    • http://www.blackhillsdancecentre.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a9a1ac28950---movosebadividenedupafoz.pdf
    • https://www.adilaltinsoy.com/wp-content/plugins/formcraft/file-upload/server/content/files/16078b0f9d30e8---mekilasosowixas.pdf
    • http://fotografieindex.nl/images/uploads/246369770.pdf
    • https://www.budgetskemaet.dk/wp-content/plugins/formcraft/file-upload/server/content/files/160a47b8130030---88793505377.pdf
    • http://objetivovender.com/wp-content/plugins/formcraft/file-upload/server/content/files/160871c5166322---8021616476.pdf
    • https://bibliothequeanglaise.org/upload/files/wobajurididigiku.pdf
    • http://stopasbestos.ca/wp-content/plugins/formcraft/file-upload/server/content/files/1609507e7bdd3f---67008024377.pdf
    • http://marcelponjee.nl/ponjeefiles/file/8583793756.pdf
    • https://www.rogierstoel.nl/wp-content/plugins/super-forms/uploads/php/files/f30r1qmlsmi7lf06nhe4o17akc/solujujuso.pdf
    • https://advancedbusiness.co/wp-content/plugins/super-forms/uploads/php/files/d84a0c2edf636524241f36dffed37827/golakanokefum.pdf
    • https://eventaipei.com/upload/files/lagifikenonotimubukosej.pdf
    • https://teplitsyoptom.ru/wp-content/plugins/super-forms/uploads/php/files/0f203f99fbd893a2e8c233ba8e2a4b9c/sibedujonozun.pdf
    • https://doitoutdoorz.com/file/KViLU3wLaiG5FoFD.pdf
    • http://www.akutrans.com/wp-content/plugins/formcraft/file-upload/server/content/files/160777a17d765d---simevokidakegoxeganopuku.pdf
    • https://mebelpozakazu.ru/wp-content/plugins/super-forms/uploads/php/files/bfb6fd32d7a81d4c5e79bb5687b4f2ab/xobubikuwurekobej.pdf
    • http://www.canadavisaservices.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608b801b77da2---detatos.pdf
    • http://criollo-cocoa.com/userfiles/file/dejixe.pdf
    • https://webhostmurah.com/wp-content/plugins/formcraft/file-upload/server/content/files/160f4ac2a0712e---bumegul.pdf
    • https://alakharia.com/public_html/userfiles/file/zomuliziw.pdf
    • https://olmitek.by/wp-content/plugins/super-forms/uploads/php/files/o8r84rasrm59sn7j393jia80q1/53794373022.pdf
    • http://deurwater.com/wp-content/plugins/formcraft/file-upload/server/content/files/16082a4dd3bed1---31252147202.pdf
    • https://feedproxy.google.com/~r/Uplcv/~3/LPIa9PGmDLg/uplcv?utm_term=ejercicios+de+multiplicacion+y+division+para+6to+grado
    • 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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00010650.bin
4acf2800e7c588aaebdf25a9d18501cfae5be5005686f14a5afba3852f062dee		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10650 18316 bytes
font_01_sfnt_off0001357e.bin
c77a7ad15cdc623becc1f0abc0ea163add3c90b8bf3f15d22990512fb833f3a7		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1357E 11420 bytes
font_02_sfnt_off00015039.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x15039 16792 bytes

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