Malicious PDF — malware analysis report

Static analysis result for SHA-256 1bab9cf56cdd411e…

MALICIOUS

PDF

98.0 KB Created: 2021-08-01 05:44:44 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-21
MD5: 622613260bfc2a0e4c18ab41f324da0a SHA-1: b0b778c27c746a46d2149b62f41ea3f1dbbb7c0d SHA-256: 1bab9cf56cdd411e12c5f1bb5d8563c80c8891cd3ae3254fa8ead2e4adb57108
156 Risk Score

Malware Insights

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

The PDF contains a link farm pointing to multiple compromised WordPress sites and disposable hosting, indicating a phishing or malware distribution attempt. The ML classifier and ClamAV detection strongly suggest malicious intent. While no scripts were extracted, the structure and URLs are indicative of a malicious document designed to redirect users to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9947

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 http://janandpoos.com/clients/872640/File/tuxesixizotepagit.pdf In PDF document text
    • https://aykutemlak.com/upload/ckfinder/files/79980701700.pdfIn PDF document text
    • http://raunlarose.us/wp-content/plugins/formcraft/file-upload/server/content/files/160b27348105ec---megulusigagikusojexetasu.pdfIn PDF document text
    • https://photographerin.agency/wp-content/plugins/super-forms/uploads/php/files/11s2b1njul1p4j756lghi8ci03/wetewiziw.pdfIn PDF document text
    • https://aquaticlandscape.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606efb143cc7b---34939363859.pdfIn PDF document text
    • https://miamivanservice.net/wp-content/plugins/formcraft/file-upload/server/content/files/160a4e06413e7e---67756691677.pdfIn PDF document text
    • https://inchirieriavioane.ro/wp-content/plugins/formcraft/file-upload/server/content/files/1606d7c3e0ac27---dudefupumulaset.pdfIn PDF document text
    • http://ahs1978hounds.com/clients/0/09/09313dc2b2b2138818c22350edca9cf7/File/wobegeluvo.pdfIn PDF document text
    • http://www.iamgoingto1996.com/wp-content/plugins/formcraft/file-upload/server/content/files/160aba3882b5dc---86041240563.pdfIn PDF document text
    • https://mercedesmazo.es/wp-content/plugins/formcraft/file-upload/server/content/files/160ab298e75fd5---44718738398.pdfIn PDF document text
    • http://tiwtactic.com/userfiles/files/newamule.pdfIn PDF document text
    • http://mega.kz/media/upload/files/92848854186.pdfIn PDF document text
    • http://traslochimontalto.it/userfiles/files/23585390710.pdfIn PDF document text
    • https://roweryelectra.eu/app/webroot/uploads/file/16213788783211.pdfIn PDF document text
    • http://www.idenet.net/wp-content/plugins/formcraft/file-upload/server/content/files/16084b1490f549---58973684478.pdfIn PDF document text
    • http://thucphamchucnangmy.vn/uploads/files/15637325187.pdfIn PDF document text
    • http://assistance.uz/images/shared/file/41681284483.pdfIn PDF document text
    • http://csc-0411.com/userfiles/file/20210611142731_6x927u.pdfIn PDF document text
    • http://www.valaisconsulting.ch/file/78981477193.pdfIn PDF document text
    • http://lawcab.ru/wp-content/plugins/formcraft/file-upload/server/content/files/1609adea6ce07c---vuxarib.pdfIn PDF document text
    • https://rfcorporation.net/wp-content/plugins/super-forms/uploads/php/files/476b647664f1679b5942eaadd4e2bf01/35156005743.pdfIn PDF document text
    • http://noxsun.com/jingkelun/userfiles/files/20210608022619.pdfIn PDF document text
    • https://xn----9sbccjdbca7cyaieg1a3j.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/3edeee722ab0bbc23f1bc8a3bd0a33c4/pasipufemorulebirowep.pdfIn PDF document text
    • http://aaykpn.com/uploads/editor/files/20373515504.pdfIn PDF document text
    • https://utilitydiscount.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606cb0ebd7446---64069823279.pdfIn PDF document text
    • https://atlanthealth.com/wp-content/plugins/super-forms/uploads/php/files/ea8c68414fae21f98d08911fc7b2b7bc/11655968396.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/zMnd8XtcwSM/uplcv?utm_term=how+to+pass+my+learners+permit+testPDF link annotation
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00011973.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11973 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off00013185.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13185 17688 bytes
SHA-256: 1eb714087472c178be4c419d73efb400b238dbacc4de42e56363f16bef3e6071
font_02_sfnt_off00015f7c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15F7C 10604 bytes
SHA-256: 9ceb8bb355c91a27ae9c04aed2f1b0e7dd4001b54a463426eeceb0de753d6897