Malicious PDF — malware analysis report

Static analysis result for SHA-256 9a7c6b8a632ee8bd…

MALICIOUS

PDF

89.9 KB Created: 2021-07-06 03:03:35 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 6577bafdc1d5815c42ffa1900cba1a8f SHA-1: 41eba3e9da82d5a489dcd17102bf197e0c2e1c45 SHA-256: 9a7c6b8a632ee8bd4210988d804da933482e3a60f9c5428038824da06e5106da
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 a link farm, with many URLs pointing to compromised WordPress sites. The ML classifier and ClamAV also identified it as malicious, specifically as a phishing trojan. The file's structure and embedded links suggest an attempt to redirect users to malicious or deceptive content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9924

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://action-roofing.com/wp-content/plugins/super-forms/uploads/php/files/8307be5c70be50af4282e76e3b0b9bae/tepojudadaral.pdf
    • https://www.sacproblemleri.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c0dc61d618e---mugukidibukorovixitiga.pdf
    • https://medok18.ru/wp-content/plugins/super-forms/uploads/php/files/01bbfacec9dcf1dcf45494413bdbceb8/94832267155.pdf
    • https://messianic.live/wp-content/plugins/super-forms/uploads/php/files/69ef963b4d0844b2037f5c3f8c4f19f0/5953091992.pdf
    • http://langeline.com/ckeditor/upload/files/25772305524.pdf
    • http://plenar.hr/wp-content/plugins/formcraft/file-upload/server/content/files/160768ca620aac---konirogexifumolab.pdf
    • http://phuwangnam.com/user_file/file/28063387281.pdf
    • https://aiwatopup.com/ckfinder/userfiles/files/merom.pdf
    • http://prodesign31.ru/wp-content/plugins/formcraft/file-upload/server/content/files/160766f1f0eae2---pexigawipaji.pdf
    • http://inewbus.com/wp-content/plugins/super-forms/uploads/php/files/617b7e4s7ops87vh8v6akjqpn5/11838693578.pdf
    • http://premiercontractinginc.com/files/file/nonasebapepes.pdf
    • http://anhuishangbiao.com/upload_fck/file/2021-5-29/20210529021847627852.pdf
    • http://greece-ex.com/images/blog//file/31526723003.pdf
    • http://ganan10.co.il/wp-content/plugins/formcraft/file-upload/server/content/files/1609032c2a6e24---vinuzo.pdf
    • https://www.dentaltaxpros.com/wp-content/plugins/super-forms/uploads/php/files/afc432924c2f12f19cf5ba86f082bccb/fideguturetiveravarikawaw.pdf
    • http://artmetinc.com/wp-content/plugins/formcraft/file-upload/server/content/files/160979c19ae156---mevelizubifug.pdf
    • https://www.advids.io/wp-content/plugins/formcraft/file-upload/server/content/files/16095bef96df61---sitibejuzidibavala.pdf
    • https://www.burit.net/wp-content/plugins/formcraft/file-upload/server/content/files/160948383d602b---nesonovabegisa.pdf
    • https://www.costaverde.it/wp-content/plugins/formcraft/file-upload/server/content/files/160c53759ede88---30485077310.pdf
    • http://strategie-online.net/catalogue_dynamique/file/xadutoviriwepifonalage.pdf
    • https://asiahijau.com/contents//files/wupavinuronu.pdf
    • http://www.pointcookelectrician.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160c0b99e06280---lekonodoxiwewe.pdf
    • https://synodradomski.pl/userfiles/file/9999080841.pdf
    • http://kwik-it.ru/wp-content/plugins/formcraft/file-upload/server/content/files/1608311df5491f---fesofufegawabuzo.pdf
    • https://feedproxy.google.com/~r/Uplcv/~3/GLLx1DTH0VQ/uplcv?utm_term=factorisation+of+polynomials+class+9
    • 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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e5d7.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE5D7 16792 bytes
font_01_sfnt_off0000fdee.bin
6b503bab9022e8fe575b851e6acb8dd8cfe903ab298cc4e95651d9b3947627ea		 pdf-font-stream PDF embedded font (sfnt) at offset 0xFDEE 10768 bytes
font_02_sfnt_off000116bf.bin
d5c6d78b9175d2fd6d4469d0d755ca263b0a40e2750ffff654b41c22a54a686e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x116BF 17292 bytes
font_03_sfnt_off0001445d.bin
1bb543891201b86cb218c82ce0c1e431878b85d3145a79f40ea94bf38162e691		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1445D 16144 bytes

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