Malicious PDF — malware analysis report

Static analysis result for SHA-256 7bedf483263d45c3…

MALICIOUS

PDF

84.5 KB Created: 2021-06-26 19:31:10 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 5d2047589857112fe2be77e0b71eaae2 SHA-1: 8d74bad62c306fc4925564c368ec9fa1fa2af7a8 SHA-256: 7bedf483263d45c3f8b7df1a6a7b748b7c5e0c1cbaeb99a1e101e9422fa8e280
156 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics as malicious, including a critical ClamAV detection and an ML classifier. It contains numerous links pointing to compromised websites, indicating a phishing or malware distribution attempt. The presence of link farms on disposable hosting and compromised CMS uploads suggests an effort to obscure the final malicious destination.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9849

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://bonafideonline.com.ar/wp-content/plugins/super-forms/uploads/php/files/11db8859bbc7d26e9e05cefbd3c09713/50691352426.pdf
    • https://petroblend.com/wp-content/plugins/formcraft/file-upload/server/content/files/160aae8a07203c---22303894247.pdf
    • http://mgmkt.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1609c8586eec3b---sokujadoxoxejukuroreped.pdf
    • http://sierrahighalumni.com/clients/878712/File/temorawufabepirotomafidi.pdf
    • https://muratay.nl/userfiles/file/67089459055.pdf
    • http://xn--80aikni6a0b.xn--p1ai/images/file/jagobu.pdf
    • https://nailseasupportgroup.com/wp-content/plugins/super-forms/uploads/php/files/f22c835aced2aaa65dc43d644ecf5250/5330013730.pdf
    • https://aliencosmicexpo.com/wp-content/plugins/formcraft/file-upload/server/content/files/160985e64d550b---raxezogaja.pdf
    • https://www.18fire.com/wp-content/plugins/super-forms/uploads/php/files/0870598cc4a8dc26b0c83f7de8a4ae18/44313145970.pdf
    • https://oglethorpeclub.org/~oglethor/UserFiles/file/muzupabemuborabinaxigere.pdf
    • http://piazzademarini3ge.com/userfiles/files/dosuwabesirajurobekapuju.pdf
    • https://educhina.mn/editor/files/vipofivekobi.pdf
    • http://www.risingstars.com.tr/wp-content/plugins/formcraft/file-upload/server/content/files/160d602db9007d---58753498702.pdf
    • http://prodesign31.ru/wp-content/plugins/formcraft/file-upload/server/content/files/1608a1a84e29d3---69812317162.pdf
    • https://la-klamm.org/userfiles/file/89543097094.pdf
    • https://thealloywheelcentre.co.uk/wp-content/plugins/super-forms/uploads/php/files/98aac17f4aba98e307c80fdd342ab9e0/tujeniwajol.pdf
    • http://styropapex.pl/userfiles/file/85172583786.pdf
    • http://extreamtuning.ru/wp-content/plugins/formcraft/file-upload/server/content/files/16071604787882---lawaxiw.pdf
    • https://www.webhisto.com.tr/wp-content/plugins/formcraft/file-upload/server/content/files/16081cc2cce383---pipimonubo.pdf
    • http://c2mag.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607b99878addd---nuxozimi.pdf
    • http://training-solutions.ro/wp-content/plugins/formcraft/file-upload/server/content/files/160c1532377305---wigenar.pdf
    • http://sitoad.com/bbqjoekey/files/202106051245375683.pdf
    • http://oilandgaswork.com/userfiles/file/33008128099.pdf
    • https://gulertrafik.com/wp-content/plugins/super-forms/uploads/php/files/v288c5575b20nbvfq62m3866a7/232280866.pdf
    • https://reifenscho.de/wp-content/plugins/formcraft/file-upload/server/content/files/160a215345177d---dunakuxalilogoxis.pdf
    • https://ijpdua.com/contents//files/6919486799.pdf
    • https://kimtuong.vn/isc/public/files/fckupload/file/rijejobuj.pdf
    • https://feedproxy.google.com/~r/skout/mBVl/~3/Om9ozkHLxGw/uplcv?utm_term=electronic+logic+for+science
    • 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_off0000e7f9.bin
b81498a0bccf6e8df19e5df2cb0e9a7ed56f48551f8d3ebcc70cd7bccfef5ebe		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE7F9 17152 bytes
font_01_sfnt_off000114d6.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x114D6 16792 bytes
font_02_sfnt_off00012ced.bin
44f2f2e366c342819151430098931317f66168e10273227ab6de75b2669ded36		 pdf-font-stream PDF embedded font (sfnt) at offset 0x12CED 10332 bytes

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