Malicious PDF — malware analysis report

Static analysis result for SHA-256 429bd7064c84ab4a…

MALICIOUS

PDF

70.7 KB Created: 2021-09-01 03:07:23 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-24
MD5: a351d69372b95f6ca19d6581232f58ae SHA-1: 6ffa1bc0cc174755040c56704c7e8a9b845088bf SHA-256: 429bd7064c84ab4a5c54b52eea1a501cbd1f91f2059a1e0367f37823b5004fe9
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was detected as malicious by ClamAV and an ML classifier. It contains numerous links to external websites, many hosted on compromised CMS platforms or disposable domains, indicating a link farm designed to redirect users. The heuristic 'SE_LOLBIN_RUN_COMMAND' suggests the document may attempt to execute commands, likely to download and execute further payloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8257

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
  • LOLBin token sequence in document text high SE_LOLBIN_RUN_COMMAND
    Extracted document text contains a Windows script/execution tool name (PowerShell, mshta, cmd, rundll32, regsvr32, …) within 220 characters of a dangerous flag, command verb, or URL. This is a visible 'run this' instruction in HTML/PDF/RTF lure bodies, or — in macro-laden Office files — the macro's own string-pool entries appearing adjacent in extracted text.
  • 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
  • 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://pristineleather.com/userfiles/file/51548522017.pdf In PDF document text
    • http://rockhousemethod.com/ckfinder/userfiles/files/zujujorijem.pdfIn PDF document text
    • https://2greenchicks.com/wp-content/plugins/super-forms/uploads/php/files/e6eef6c4a930d8502c9a583ce5eef1b4/68714648542.pdfIn PDF document text
    • http://israel-aliya.com/wp-content/plugins/super-forms/uploads/php/files/0058aabfe88517b6f346770fd3043f79/sufukilizijusepot.pdfIn PDF document text
    • https://minutesnap.com/wp-content/plugins/super-forms/uploads/php/files/082914b9224c9806187e5c9dad8d9c44/dowijavuvubimixirifagi.pdfIn PDF document text
    • https://www.hdcorp.com.br/wp-content/plugins/super-forms/uploads/php/files/sdo15ecmde1acui6lglp8c7hpn/kexejezuwap.pdfIn PDF document text
    • http://littlepearlbooks.in/data/eimages/file/gaganegakipukasisesij.pdfIn PDF document text
    • http://czytamzezrozumieniem.pl/userfiles/file/38538693157.pdfIn macro / runtime command snippet
    • https://www.larche-de-jules.fr/ckfinder/userfiles/files/23887169608.pdfIn PDF document text
    • https://planet-for-events.de/userfiles/file/24318111760.pdfIn PDF document text
    • https://plantbiochem.com/ckfinder/userfiles/files/rilamafopozexipivutarexuz.pdfIn PDF document text
    • https://edubox.mn/uploads/users/0/files/daxala.pdfIn PDF document text
    • https://theatresaucinema.fr/uploads/file/59267265173.pdfIn PDF document text
    • https://vuaship.com/wp-content/plugins/super-forms/uploads/php/files/ru954qpsmtpj7bautf594k18ua/78896990729.pdfIn PDF document text
    • https://youstore21.com/wp-content/plugins/super-forms/uploads/php/files/5593804bece1d0814b0256f1566a118e/wawurutorozinitojikexi.pdfIn PDF document text
    • https://lynnesnaturaltreats.com.au/wp-content/plugins/super-forms/uploads/php/files/35f53528b1fdc6fbe3586ad6b8958fd4/defiwaroriv.pdfIn PDF document text
    • http://sarahscupcakery.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607d254bcd218---pikiwoxepeninobewiler.pdfIn PDF document text
    • https://robinio.de/wp-content/plugins/super-forms/uploads/php/files/i4vmaml6s87jvk2s0vatefe0r3/7428063671.pdfIn PDF document text
    • http://christembassydocklands.org/wp-content/plugins/super-forms/uploads/php/files/f5237b6eddfb99a4896877f8e3a078e3/48095419102.pdfIn PDF document text
    • https://takeorders.online/wp-content/plugins/super-forms/uploads/php/files/meudojf209ag38qignpeiiirku/60558808420.pdfIn PDF document text
    • http://bowenlawmt.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/96052171368.pdfIn PDF document text
    • http://ezstreetautosales.com/clients/876244/File/88285289989.pdfIn PDF document text
    • https://avenue102.com/uploads/file/8805388368.pdfIn PDF document text
    • http://hesexpo.com/img/editor/image/file/gadipanutufapubawenas.pdfIn PDF document text
    • http://littlepearlbooksIn macro / runtime command snippet
    • https://feedproxy.google.com/~r/skout/mBVl/~3/1KS0DP0cxss/uplcv?utm_term=lawrence+stenhouse+1975PDF link annotation
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000cc16.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCC16 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000e428.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE428 17872 bytes
SHA-256: 15fd488cc332f5a8546deabe9e0b1aa38c3fb4c3f3ce001721ed3ee626003352

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