Malicious PDF — malware analysis report

Static analysis result for SHA-256 e795fadb952833ed…

MALICIOUS

PDF

87.4 KB Created: 2021-06-26 00:16:25 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: c0c1bbc16790607f738e52858aad9697 SHA-1: 7caf537f3a9d9b12c6b267ac0d3602911e62d6a5 SHA-256: e795fadb952833ed63db4fc5373f5a267880f7fbb8bf3481c2da57cc7ab995c8
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF file was identified as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. Heuristics reveal it functions as a link farm, directing users to multiple external websites, many of which are hosted on compromised or disposable domains. This suggests an attempt to lead users to phishing or malware distribution sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9835

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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 http://www.airportlimofortlauderdale.net/wp-content/plugins/formcraft/file-upload/server/content/files/1606f3f9d2fdfa---jerugazav.pdf
    • http://aitrans.cn/UploadFile/file/F1202106050100303682.pdf
    • http://cncforginghammer.com/d/files/mokiwapefumolumu.pdf
    • http://vimar.ua/userfiles/files/guwezajijisoko.pdf
    • https://rpitrade.com/ckfinder/userfiles/files/6018646800.pdf
    • https://www.xcelsus.de/wp-content/plugins/formcraft/file-upload/server/content/files/1608c578cd2223---wowonusisubirok.pdf
    • http://www.alfainstal.pl/wp-content/plugins/formcraft/file-upload/server/content/files/16072a05ad3b36---10167148976.pdf
    • http://www.yourhealthyourchoice.org/wp-content/plugins/formcraft/file-upload/server/content/files/160bfea5539a3c---66322632547.pdf
    • https://beaumont-residence.com/wp-content/plugins/super-forms/uploads/php/files/fotvj6cp74elp6kl53iet3oa5f/bubewuparebixi.pdf
    • https://www.gasserbush.com/wp-content/plugins/super-forms/uploads/php/files/c1f91a5bca33b25d2ce7866ea47173f7/81308384345.pdf
    • http://poiskvod.ru/images/file/dusadusumavomapusede.pdf
    • https://fjordancv.info/wp-content/plugins/super-forms/uploads/php/files/937cc2a19e8dd51957d1816a8d9d7b3d/kevoje.pdf
    • http://www.skup.it/wp-content/plugins/formcraft/file-upload/server/content/files/160939664e51c9---84576669987.pdf
    • http://cricalliance.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607c737297b6b---22325811017.pdf
    • http://2girlstrippin.com/wp-content/plugins/formcraft/file-upload/server/content/files/16071966580dd5---84007471403.pdf
    • https://sketchup360.vn/wp-content/plugins/super-forms/uploads/php/files/8scrfrt9jjvr8h1pp0kbvdpahv/pidogubirukajebofaverire.pdf
    • http://vilaportugal.com/wp-content/plugins/formcraft/file-upload/server/content/files/160907c79973a8---fepifatewa.pdf
    • http://www.iamgoingto1996.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607c7f2a1a6d2---57267532449.pdf
    • http://recruiters-zone.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b055ed9f380---88426744740.pdf
    • https://www.golaw.net/wp-content/plugins/formcraft/file-upload/server/content/files/1608037065059f---lelase.pdf
    • http://alituncer.com/userfiles/file/tozuzopowezopopoxogaxem.pdf
    • https://www.sevgiliyevideo.net/wp-content/plugins/formcraft/file-upload/server/content/files/160944f1704587---kegifejimezelimujeruzawa.pdf
    • http://www.thediethub.in/wp-content/plugins/formcraft/file-upload/server/content/files/160b7dfe904c14---janovopotelulenepogobixer.pdf
    • http://clinicacomciencia.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1609b8141f37b7---baparasiribe.pdf
    • http://93564497.com/userfiles/nesitud.pdf
    • https://www.arphplumbing.co.uk/wp-content/plugins/super-forms/uploads/php/files/l0dd58fgprg1e40man1i36lfqf/44713971754.pdf
    • http://globaltruthmediagroup.com/clients/a/aa/aa8380eac451876ae6ab993bf3a720d6/File/tegedejuwukubowu.pdf
    • http://shophouse.info/images/files/tevepavatabijazuxop.pdf
    • https://feedproxy.google.com/~r/Uplcv/~3/A3Ryygt5BCM/uplcv?utm_term=taste+buds+side+of+tongue
    • 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_off0000f33d.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF33D 16792 bytes
font_01_sfnt_off00010b4f.bin
3b0cb1b32ac2ff3dbcc4d9d0ea289a4bfaeb5dd839c7f7d7e5f2df5c0f54c745		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10B4F 17152 bytes
font_02_sfnt_off00013814.bin
00e6baf0a0f8d39bffea6ca6aca7a8752bbcd3a3fe4d590f25eec35285d466db		 pdf-font-stream PDF embedded font (sfnt) at offset 0x13814 10584 bytes

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