Malicious PDF — malware analysis report

Static analysis result for SHA-256 1f355d5559557d43…

MALICIOUS

PDF

83.7 KB Created: 2021-06-30 22:57:01 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: cc961541b63ffcf7c83740fea5713022 SHA-1: 6abc33e1ca3cf67c8b00051be78aa2255e27c98b SHA-256: 1f355d5559557d4330357a5c5e14541893b3c35436a402b8b72aaacbf42caed4
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, exhibiting characteristics of a link farm. It contains numerous URLs pointing to compromised CMS upload storage and disposable hosting, suggesting an attempt to redirect users to malicious sites. No scripts were extracted, but the structure and URL patterns strongly indicate a phishing or malware distribution lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9833

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://mobilephleb.com/clients/2/2d/2d2188d13063160162e6e2bbcdac547d/File/kogesuvivokuwosa.pdf
    • https://gmonlinestore.com/wp-content/plugins/formcraft/file-upload/server/content/files/160828d958eacb---terusaduzokej.pdf
    • http://www.sunarozlem.com.tr/wp-content/plugins/super-forms/uploads/php/files/fharfdmenj9j8r876v52v020k7/12491499643.pdf
    • http://www.combatsim.eu/wp-content/plugins/formcraft/file-upload/server/content/files/160c5afbe2e5e1---suserujek.pdf
    • http://vivatbacchus.hu/files/file/42484082905.pdf
    • https://economiadecomunion.net/ckfinder/userfiles/files/zuwiv.pdf
    • https://www.ideaklinik.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607c13bd0b378---lovinilubobexoru.pdf
    • https://hoangnhataudio.vn/media/files/nipexopivavaxejo.pdf
    • https://medok18.ru/wp-content/plugins/super-forms/uploads/php/files/8bb9e0f869cb9eafeb4a95fb74f6c275/deberorizanoju.pdf
    • https://www.pal-kont.hu/wp-content/plugins/super-forms/uploads/php/files/50da7c7d0665585bb1516b28707227ea/13258916871.pdf
    • http://carrozzeriardue.it/userfiles/files/viviwinuzodufifipofoxa.pdf
    • https://psychotherapie-dr-albrecht.de/wp-content/plugins/formcraft/file-upload/server/content/files/160721a457c124---90255318831.pdf
    • http://csc028.com/userfiles/file/20210617182356_o207dx.pdf
    • https://dezsredstvompx.ru/wp-content/plugins/super-forms/uploads/php/files/a6e82807d20f7eb67e135115244494b7/12014605578.pdf
    • http://champagne-marc-chauvet.com/images/files/towujolozagada.pdf
    • http://aberdeeneyes.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160989f3950ce9---49479202223.pdf
    • http://safarang.com/basefile/files/9923049950.pdf
    • http://travisreunion.com/clients/1/1d/1d9c560ef9ee6310b862f4c9d288d7bd/File/fidoxawisinanesiwebaxusob.pdf
    • https://adm.allianceflooring.net/wp-content/plugins/super-forms/uploads/php/files/7db980e39d7eab375633cd8a192d3a91/65434264151.pdf
    • http://plastikacz.cz/soubory/files/newubosotebuxi.pdf
    • https://www.paparazzirestaurant.com.au/wp-content/plugins/super-forms/uploads/php/files/e6a6d9c310b62bbac8ac62c64dd8a4be/27249366412.pdf
    • https://laneopx.com/wp-content/plugins/formcraft/file-upload/server/content/files/160aaa7f0a58bf---kulat.pdf
    • http://xn--80aagkbrca3apkgkee0a1bi.xn--p1ai/ckfinder/userfiles/files/mabeg.pdf
    • http://applexin.com/ttpsea/files/file/gojadixipotudo.pdf
    • http://drinkandshrink.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160840f63bf1e8---boxuwagipelonu.pdf
    • http://aeskulap24h.de/wp-content/plugins/formcraft/file-upload/server/content/files/160b1b85221b13---rowobitovudimumusukapa.pdf
    • https://sabagdasarov.ru/upload/file/nigitijezudofo.pdf
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/1xuhb7AK25c/uplcv?utm_term=sexy+18+year+old+girls
    • 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_off0000e20b.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE20B 16792 bytes
font_01_sfnt_off0000fa22.bin
14db060c1845af69590035049e828822710ad77bbac7342ec33f786f9c7c6ee8		 pdf-font-stream PDF embedded font (sfnt) at offset 0xFA22 10772 bytes
font_02_sfnt_off000112d5.bin
55c7615e03a74fcedafbe01eeb1b31ca41a29dcc09cd639cd7fd51ee219ae504		 pdf-font-stream PDF embedded font (sfnt) at offset 0x112D5 17304 bytes

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