Malicious PDF — malware analysis report

Static analysis result for SHA-256 bb0190599bf290af…

MALICIOUS

PDF

86.9 KB Created: 2021-07-02 03:28:38 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: 92bdbc26770c48ed5352f9dfa8070ae9 SHA-1: cf1392b969d43cfb18781b038e71785a51760029 SHA-256: bb0190599bf290af1051b5326320aa6dc377d730d60e727dbc22071293ce0a51
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged by multiple heuristics and a machine learning classifier as malicious, with ClamAV identifying it as a phishing trojan. The file contains a link farm pointing to numerous compromised WordPress upload directories, suggesting it is used to distribute malicious content or redirect users to phishing sites. The presence of embedded URLs and the nature of the link farm indicate an attempt to lure users to external malicious resources.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9835

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://pixomot.ru/uplcv?utm_term=balance+sheet+and+profit+and+loss+account+of+any+company PDF link annotation
    • https://callhfelectric.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608190adaa8cc---musapotawuduresawab.pdfIn PDF document text
    • http://clinicacomciencia.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160d6587901d32---2975027220.pdfIn PDF document text
    • http://dom-nenilovo.ru/wp-content/plugins/super-forms/uploads/php/files/b503d033fbeb369719321697d70338b3/boxonitofezoladekixekub.pdfIn PDF document text
    • https://protechlighting.com/wp-content/plugins/super-forms/uploads/php/files/4fb34e6f71b5fbf93609d175a2fbd7d6/pagisafiwekiges.pdfIn PDF document text
    • http://sooclose.eu/upload/File/xobikuvurisa.pdfIn PDF document text
    • https://acronimocostanzo.com/userfiles/file/nasati.pdfIn PDF document text
    • http://smithmurdock.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609d03d990a15---99101187051.pdfIn PDF document text
    • http://stkvn.ru/wp-content/plugins/super-forms/uploads/php/files/96805c5787873abd3914ca922271666f/wojowonefifamok.pdfIn PDF document text
    • https://edoxmarketing.com/wp-content/plugins/super-forms/uploads/php/files/r86co8j99c16u0te33tiqcluvn/pipavexisijamuwetixixi.pdfIn PDF document text
    • https://www.zulilighting.com/wp-content/plugins/super-forms/uploads/php/files/ebfb0789ea3acb144a1700bfcf196135/96172766321.pdfIn PDF document text
    • http://thaoduocvn.com/userfiles/image/file/11264977708.pdfIn PDF document text
    • https://bentzendesign.se/wp-content/plugins/formcraft/file-upload/server/content/files/160bb8e7d47549---kojujanebalirixa.pdfIn PDF document text
    • http://qboardapp.com/wp-content/plugins/super-forms/uploads/php/files/52d1c5da9635e8025ab7febb14c9a405/xozesubuwapidotofiz.pdfIn PDF document text
    • http://crm333.com/documentos/file/76767368981.pdfIn PDF document text
    • https://estigotours.com/wp-content/plugins/super-forms/uploads/php/files/30ed2e28c607412696cec2c768ad2e9a/66369872309.pdfIn PDF document text
    • https://webmodels.studio/wp-content/plugins/formcraft/file-upload/server/content/files/160afe71b4886e---89765436453.pdfIn PDF document text
    • http://www.hotel-margherita.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a10a0b7d988---jowemoropuxi.pdfIn PDF document text
    • http://willettelaw.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/87844371277.pdfIn PDF document text
    • http://finsura-lifedirect.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/16080730d3077c---21866444203.pdfIn PDF document text
    • http://www.fliesen-brill.de/wp-content/plugins/formcraft/file-upload/server/content/files/1607a63b61290b---12093883451.pdfIn PDF document text
    • https://westcoastmovers.ca/wp-content/plugins/super-forms/uploads/php/files/7q4j1bstq648vbgme9691abvrg/67745321055.pdfIn PDF document text
    • http://orhs76reunion.com/clients/30721/File/fuloviwuroso.pdfIn PDF document text
    • http://beachfirebrands.com/userfiles/file/kegokasologemoremilif.pdfIn PDF document text
    • https://webtechnocrats.com/upload/file/jiwijarirumo.pdfIn PDF document text
    • http://zap-interactive.com/uploads/files/71132996133.pdfIn PDF document text
    • http://cancercareresearch.com/userfiles/file/surunasigok.pdfIn PDF document text
    • http://perfectthesale.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606ca379f2934---wikepukiwegagob.pdfIn PDF document text
    • 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_off0000f101.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF101 11152 bytes
SHA-256: f53663ec443fadd69c44670ff28b22d1039514abc10a6dda3d0290b7eb040158
font_01_sfnt_off00010ae6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10AE6 16392 bytes
SHA-256: c6a8196ea777663092dbd831e9765192ec01a856aca8817cd60e674808cc8455
font_02_sfnt_off00013579.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13579 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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