Malicious PDF — malware analysis report

Static analysis result for SHA-256 9fe2c85822b4a0fb…

MALICIOUS

PDF

74.2 KB Created: 2021-06-25 22:36:58 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: eb3e771512b4374cee29aaefc67afb0f SHA-1: 664c85f34df9813b0cc7cff36bc5ab068f8cad8a SHA-256: 9fe2c85822b4a0fb155e943e7ab86a51f56ca6ef0da5575075cb43620e19735a
156 Risk Score

Malware Insights

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

The file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains numerous links pointing to compromised WordPress sites and other disposable hosting, suggesting a link farm designed to redirect users. The presence of these links and the overall structure strongly suggest a phishing or malware distribution campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9951

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://greenturtleproductions.com.au/wp-content/plugins/super-forms/uploads/php/files/d4b97c3a3ad67e40aef6bfad50b0f004/91641810794.pdf
    • http://www.dramayaramendes.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1606d374503c79---60941985130.pdf
    • http://claudiodauelsberg.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160a610aa56f71---95563700622.pdf
    • http://tivatijapan.com/uploads/userfiles/file/renivop.pdf
    • http://counterreaction.net/wp-content/plugins/formcraft/file-upload/server/content/files/1607d81c5374f4---62636514864.pdf
    • http://suportti.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bb697b529d6---wodiriminutaragolosejin.pdf
    • http://www.suffaheducation.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a3cac63e306---sejibavebu.pdf
    • https://cutletsmeat.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606e94813a733---6277013886.pdf
    • https://www.andimoda.com/wp-content/plugins/super-forms/uploads/php/files/7e72be960689e2daf77c33941ccd7cc0/ratokobaz.pdf
    • http://www.adanakursmerkezi.com/wp-content/plugins/formcraft/file-upload/server/content/files/160af9fcd88fe7---94735901501.pdf
    • http://industrialdevices.in/uploads/zujenefavozogumamenexuv.pdf
    • https://lllk.ru/wp-content/plugins/super-forms/uploads/php/files/30d575df9b21508f88c0971a0d77df9d/lomonimujevinodilulaw.pdf
    • https://suprizpin.com/calisma2/files/uploads/dowipebekamoda.pdf
    • http://www.julitolaschools.com/wp-content/plugins/formcraft/file-upload/server/content/files/160d0c935674b8---26291295357.pdf
    • http://makaifruits.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607ca0e27d960---lajezupezokujeti.pdf
    • https://aryaayur.com/wp-content/plugins/formcraft/file-upload/server/content/files/160722b0f32186---duxuwakobakanibobenu.pdf
    • https://frasertechno.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608d3c00f0183---31908340228.pdf
    • https://zlato-eu.sk/upload/files/dubiwozoxixeremujebofinev.pdf
    • http://www.itbaloch.com/wp-content/plugins/formcraft/file-upload/server/content/files/16071037377e02---76250203016.pdf
    • http://claudiodauelsberg.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160b954f4679e6---62779108510.pdf
    • http://novaserv.com/wp-content/plugins/formcraft/file-upload/server/content/files/16077ab891d96a---62925049582.pdf
    • https://rubenoferro.com/userfiles/file/mepufepebuxamikaf.pdf
    • http://www.appsolutely.sg/wp-content/plugins/formcraft/file-upload/server/content/files/1607401c100620---sifokin.pdf
    • https://action-roofing.com/wp-content/plugins/super-forms/uploads/php/files/e3c0b852d50aefc0236c5571c86fa633/822750814.pdf
    • https://feedproxy.google.com/~r/skout/mBVl/~3/LPIa9PGmDLg/uplcv?utm_term=mp4+juice+free+download+video
    • 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_off0000c1a8.bin
9476954352812fd5ab9d1555d4343e1a256916c7d8aaefa25d4412f276b0418e		 pdf-font-stream PDF embedded font (sfnt) at offset 0xC1A8 10800 bytes
font_01_sfnt_off0000dab6.bin
72a68fc3be1305a1312cd2c51e86213ab9474fc4328548d1b7998a7802ad5415		 pdf-font-stream PDF embedded font (sfnt) at offset 0xDAB6 15908 bytes
font_02_sfnt_off00010399.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10399 16792 bytes

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