Malicious PDF — malware analysis report

Static analysis result for SHA-256 0d3a5e5ace966e7e…

MALICIOUS

PDF

91.7 KB Created: 2021-07-05 03:47:12 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 91ab36a845af868fe0d455b57c472a13 SHA-1: 463297335c3e21cf90147ce47d978aed110e3c9c SHA-256: 0d3a5e5ace966e7e8dec976eedb6514f9a8110fbd16f2a3f73220c18e8359539
156 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics as malicious, including a high-confidence ML classifier and ClamAV detection. It contains numerous links to compromised WordPress sites, suggesting it is part of a link farm designed to redirect users to malicious content. The presence of external URIs and compromised CMS upload links indicates a likely phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9822

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://swimproject.eu/wp-content/plugins/super-forms/uploads/php/files/af9c12961c00997de286f4dda3bf312a/5446646911.pdf
    • https://www.ikedatosou.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c12dca35515---suberejux.pdf
    • http://profisystem.ro/wp-content/plugins/formcraft/file-upload/server/content/files/1609796dd4dec8---17790660017.pdf
    • http://txextremecarts.com/userfiles/file/biwawefawadowuridiwo.pdf
    • https://sasalidayanisma.org/uploads/file/wapinatokomugen.pdf
    • http://pulsrmedia.com/wp-content/plugins/formcraft/file-upload/server/content/files/160813c38f0fdc---ledetovoxenatakiga.pdf
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606ced574ad4b---84932652286.pdf
    • http://www.kliningstroy.ru/wp-content/plugins/formcraft/file-upload/server/content/files/160af9e718ec11---pozakatolawedukalapifu.pdf
    • http://shinies.ru/img/lib/file/digedosubomasorobaje.pdf
    • https://www.webhisto.com.tr/wp-content/plugins/formcraft/file-upload/server/content/files/160a036812857b---zusuxe.pdf
    • https://klingende-zeder.de/wp-content/plugins/formcraft/file-upload/server/content/files/1607d26d454a72---ratimox.pdf
    • http://sosnovgeo.ru/userfiles/file/34889919382.pdf
    • http://churchtextile.com/userfiles/file/34960656185.pdf
    • https://canadianrelocation.net/wp-content/plugins/formcraft/file-upload/server/content/files/1608aab9e48e93---26030911594.pdf
    • https://beldaoyun.com/calisma2/files/uploads/kasudokuxodusosuzedigako.pdf
    • https://budapestpainter.hu/ckfinder/userfiles/files/42301648419.pdf
    • http://footstepfloor.com/upfiles/files/vaxirabiz.pdf
    • http://abimobiliare.pl/pliki/File/26201363856.pdf
    • http://gfhs1978reunion.com/clients/56625/File/nijarifaxamibap.pdf
    • https://edukiya.com/wp-content/plugins/super-forms/uploads/php/files/180d3756d05557df206bdeb25cec68be/wubotuwupidazuzakuji.pdf
    • https://area34.info/wp-content/plugins/super-forms/uploads/php/files/uq36oa276torckarn1ovgrf7j1/30686797819.pdf
    • https://gtsonline.nl/wp-content/plugins/super-forms/uploads/php/files/fjbmnj0ol9ihomd6hq1ceicq0g/nurotapirudiremiwawaj.pdf
    • http://morard-mcf.fr/data/Files/28792232069.pdf
    • http://artecgroupservices.com/imagenes/file/dawad.pdf
    • http://www.appsolutely.sg/wp-content/plugins/formcraft/file-upload/server/content/files/160c012991548e---puwitugaziderigizozig.pdf
    • http://iideree.org/wp-content/plugins/formcraft/file-upload/server/content/files/1607e9ec6e85ef---68912220186.pdf
    • http://ahs1978hounds.com/clients/0/09/09313dc2b2b2138818c22350edca9cf7/File/rimenuwo.pdf
    • https://jfefood.com/wp-content/plugins/super-forms/uploads/php/files/f49d4670eeb5363597aa4e3e7df300f5/49001679175.pdf
    • https://feedproxy.google.com/~r/Uplcv/~3/3vuEKuznOb8/uplcv?utm_term=my+dog+chases+his+tail+all+the+time
    • 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_off00010506.bin
9daad78f1c5b6eee4acfea4c759fd8341f40bb35e98671a67028be47f68bde02		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10506 10720 bytes
font_01_sfnt_off00011d7b.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x11D7B 16792 bytes
font_02_sfnt_off0001358d.bin
547fb57ccf49a4dc8dae55739f21b625e1c63cabafe4d49066ffaf6180e33a0b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1358D 16764 bytes

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