Malicious PDF — malware analysis report

Static analysis result for SHA-256 34faba20d8ca117f…

MALICIOUS

PDF

94.9 KB Created: 2021-06-30 10:53:29 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 1c9da9a7b8b5584f1507cb56f3945a6b SHA-1: d5039349c871f982137707c60c0abfbbc74bc2c4 SHA-256: 34faba20d8ca117fdbca85fa3e3240f40aca108387eb7e386eccda1defdb26df
176 Risk Score

Malware Insights

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

The file is identified as a malicious PDF by ClamAV and an ML classifier. It contains numerous embedded URLs pointing to compromised WordPress sites and disposable hosting, suggesting a link farm designed to redirect users. The presence of external URIs and a raw IP address further indicates an attempt to lead the user to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9820

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Clickable URI points to raw IP address medium PDF_URI_IP_LITERAL
    PDF contains a clickable HTTP(S) action whose host is a literal IPv4 address. Legitimate documents normally link to named domains; raw-IP destinations are common in disposable phishing and malware-delivery infrastructure.
  • 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://ketchas.ru/uplcv?utm_term=tell+me+about+yourself+without+experience
    • https://ailani.org/wp-content/plugins/super-forms/uploads/php/files/d53d426d9c857fc7c0737eabce8cbaa8/48129626543.pdf
    • http://kaies.cn/upfiles/2106280054138901278kwn1v.pdf
    • https://www.surajinformatics.com/wp-content/plugins/super-forms/uploads/php/files/575dcd9fbb0ce8018c51c10eb233a62a/jenofixebekagavedomaze.pdf
    • https://quickonboarding.com/wp-content/plugins/super-forms/uploads/php/files/8aa00700a8313339d30a47028007c32c/gabefagetewalimig.pdf
    • http://protech.com.ng/wp-content/plugins/formcraft/file-upload/server/content/files/1607714884fa31---78281703076.pdf
    • http://acetuitioncentre.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160afd306eb391---50228875373.pdf
    • https://feriaesotericadeatocha.com/wp-content/plugins/formcraft/file-upload/server/content/files/160787f07c3957---pojuwunupanelam.pdf
    • http://robalton.es/Albums/images/file///pugisedon.pdf
    • https://xn----9sbccjdbca7cyaieg1a3j.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/df59c3d161cdf531995bbbe80b59e8a4/69624144483.pdf
    • https://picinterior.com/ckfinder/userfiles/files/57093488372.pdf
    • https://relleno-acidohialuronico.com/wp-content/plugins/super-forms/uploads/php/files/bdbad57e6751b50ba8e71e4679d04986/95417331405.pdf
    • http://www.sunarpazarlama.com/wp-content/plugins/super-forms/uploads/php/files/97ah30ort6umjdb9fiuqbrket2/beguzulikinikixavuxumeju.pdf
    • http://metzpaintings.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bbaa095c0a4---45029215519.pdf
    • https://riolospettacoli.it/filesUploads/file/72291677834.pdf
    • https://trucraftsmanship.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609e95fe2e0bd---77833238294.pdf
    • https://www.karenlovelee.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609bcf0a94272---7609355532.pdf
    • http://xn--80ackbssfuieecff0e8c.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/1clikpri3adk25ndgl1q5m0g77/loxawowuvanajuba.pdf
    • https://rittenhousesmiles.com/wp-content/plugins/super-forms/uploads/php/files/a341101f940c9955027771a43bfa8b3f/todirimulatexezuruzofi.pdf
    • https://ols.lighting/wp-content/plugins/super-forms/uploads/php/files/230fbc2599d3ba716cbd4f48a6497e55/94443378455.pdf
    • http://www.yoko-ono.be/images/userfiles/file/tikiwubexif.pdf
    • https://beaumont-residence.com/wp-content/plugins/super-forms/uploads/php/files/tpr9m2p25bjmqg1lpvnoo1fka9/18549826649.pdf
    • http://www.carolglassman.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606d0689e7a59---99248899925.pdf
    • http://www.infranetltd.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609f1b8ca134b---25572753565.pdf
    • http://xn----8sbnbd9chja.xn--p1ai/userfiles/file/52399896524.pdf
    • http://104.156.58.56/~web2inbox/wp-content/plugins/formcraft/file-upload/server/content/files/160c1b1e568f1a---watiwumewukuf.pdf
    • http://middlegeorgiacoinclub.com/wp-content/plugins/formcraft/file-upload/server/content/files/16098dad12db86---36176570241.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00011004.bin
beaf7ee5d377c85265b63223f9723a9731f31f2744e548f81fec66c51082259e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x11004 16848 bytes
font_01_sfnt_off00013ba6.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x13BA6 16792 bytes
font_02_sfnt_off000153bd.bin
687fcbb3fb506283ffa7b49dc58e7c312ce296cf18be2fa2bde9ae24e2b40f57		 pdf-font-stream PDF embedded font (sfnt) at offset 0x153BD 11252 bytes

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