Malicious PDF — malware analysis report

Static analysis result for SHA-256 470b23bca17898f4…

MALICIOUS

PDF

84.5 KB Created: 2021-06-30 06:11:38 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: e6b0368963d29d64fa30978bfb5a152e SHA-1: aadee3584bd1df32262df6542d3501503a803169 SHA-256: 470b23bca17898f4402affe9092846e13bd1e58f2cbcdc53a254015fde851f81
156 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating it likely serves as a phishing or trojan delivery mechanism. The heuristics reveal it functions as a link farm, with numerous URLs pointing to compromised WordPress sites and potentially malicious PDF files hosted within their upload directories. The presence of these links suggests an attempt to redirect users to malicious content or further stages of an attack.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9833

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 https://www.wflorlando.com/wp-content/plugins/super-forms/uploads/php/files/bfa03f23314df86ea80f2e9a9abbb781/43467557790.pdf
    • http://projectbudapest.hu/wp-content/plugins/formcraft/file-upload/server/content/files/1606f01e5f01dd---17342611603.pdf
    • https://www.projectorrentals.com/wp-content/plugins/formcraft/file-upload/server/content/files/16088f6a878969---xixipewogumorevixukoke.pdf
    • https://www.frankreich-ferien.ch/wp-content/plugins/formcraft/file-upload/server/content/files/1609b5b88dd44f---94744769361.pdf
    • https://www.democratum.com/wp-content/plugins/super-forms/uploads/php/files/f242c8f5b2bf2dbd3d019e847a0207e2/65087247387.pdf
    • https://nowackleverkusen.de/wp-content/plugins/formcraft/file-upload/server/content/files/160ab2349c10d9---nefufo.pdf
    • https://irisapp.cn/uploadfiles/fckeditor/20210614/file/16236525039578.pdf
    • http://vote4dannybarry.com/clients/2/2f/2f5d4f67c16906f9b09010289963de11/File/26070165235.pdf
    • https://arhometutor.com/userfiles/file/25309709681.pdf
    • https://absolut-fit-and-dance.de/wp-content/plugins/super-forms/uploads/php/files/bmtme7lcggof1bla8i27bkjrqj/pamemurotafemijolu.pdf
    • http://lisahyatthealth.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609ae0a14be86---walozasi.pdf
    • http://timelessmebel.ru/wp-content/plugins/super-forms/uploads/php/files/00db137fa8bb73f55f4955293abdf6f3/betirijej.pdf
    • http://thetestmag.com/userfiles/files/duvupuxekizirosalozug.pdf
    • http://ozona.pt/wysiwygfiles/file/rajudazavadosarofe.pdf
    • http://www.suffaheducation.com/wp-content/plugins/formcraft/file-upload/server/content/files/160753e9258039---desekagifomedekaxorapep.pdf
    • https://flardochform.se/userfiles/file/52668631967.pdf
    • http://gingerwooddesign.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606cc8cade51e---43451819224.pdf
    • http://cameronhaddock.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a8efcd21157---sipezivulanoke.pdf
    • http://www.ddd-iasi.ro/wp-content/plugins/formcraft/file-upload/server/content/files/160d7afa55f900---bewawifugu.pdf
    • http://anaminfo.com/attachfile/file/94971804050.pdf
    • http://quickfix-poland.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608b2a3c618f4---67126294551.pdf
    • http://asiavent.com/UserFiles/file///68303636977.pdf
    • https://ceccarbotosani.ro/userfiles/file/gasazetu.pdf
    • https://sodigital.it/wp-content/plugins/formcraft/file-upload/server/content/files/160c9583ed9f14---renupus.pdf
    • http://remontnoedelo.ru/wp-content/plugins/formcraft/file-upload/server/content/files/1608ba5af843de---40671845268.pdf
    • https://fermuar.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607e345c84bb4---5488347957.pdf
    • https://aftaplan.com/works/peepsparty/html/upload_files/file/lokazafakat.pdf
    • https://theemperorsoldclothes.co.uk/wp-content/plugins/super-forms/uploads/php/files/ugdakdun2tu9248q7vhblnfgtb/1185165373.pdf
    • https://feedproxy.google.com/~r/Uplcv/~3/Om9ozkHLxGw/uplcv?utm_term=the+secret+to+dating+your+best+friend%27s+sister+read+online+free
    • 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_off0000e76a.bin
8c81487f8d1cd132b31d41f85e19f2a783a0a6a30a55a99dc7ea457b083d34fc		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE76A 16448 bytes
font_01_sfnt_off000111ec.bin
1a47afcd486bfc22cceb7cb18cc34bd659ec711ffcc4d3cc1bc1db45de5e9a67		 pdf-font-stream PDF embedded font (sfnt) at offset 0x111EC 11104 bytes
font_02_sfnt_off00012ba4.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x12BA4 16792 bytes

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