Malicious PDF — malware analysis report

Static analysis result for SHA-256 3fb566eca26c095d…

MALICIOUS

PDF

88.2 KB Created: 2021-07-13 16:48:21 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 4570b00d73090e0c4ed04254c825b9c1 SHA-1: 72b5222912b05800cbd4b7d46995bc68fbc76e60 SHA-256: 3fb566eca26c095d30c755401467853311d6f618751c6ae3ee2347c203518237
164 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ClamAV and an ML classifier. It contains numerous links to compromised WordPress sites, suggesting it is part of a link farm designed to distribute malware or phish for information. The presence of a visual download button further supports a deceptive lure to encourage user interaction.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9835

Heuristics 7

  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://philabc.ru/uplcv?utm_term=taxiwala+full+movie+download+in+moviesda
    • http://suportti.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b6e7efa20b0---51053366592.pdf
    • http://yossy.biz/userfiles/file/42214041864.pdf
    • http://kaufdeinauto.de/wp-content/plugins/formcraft/file-upload/server/content/files/160c74c972fce2---333306587.pdf
    • https://www.sadcmedia.com/wp-content/plugins/super-forms/uploads/php/files/5fvr5de13l13ie48suukhl4ver/40258020845.pdf
    • http://drvision.org/wp-content/plugins/formcraft/file-upload/server/content/files/1609a3fa3ad056---98279890009.pdf
    • http://mfcwestenkwartier.nl/beta/userfiles/file/winejugobamotowoxuxutajiw.pdf
    • https://www.teppiche-waschen-hamburg.de/wp-content/plugins/formcraft/file-upload/server/content/files/1608c7c0f7b88b---30090521006.pdf
    • https://ltanimalpark.com/wp-content/plugins/super-forms/uploads/php/files/f8d90959339a73d3457ce00b4d16a76f/34564519058.pdf
    • https://gift-edu.ru/wp-content/plugins/super-forms/uploads/php/files/341606c6308fd31d18876c4beac87ad0/letodipoj.pdf
    • http://www.onekaddy.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b30ad67d2dc---loruresisewugagug.pdf
    • http://georgefamilyreunion.org/clients/86186/File/18064955673.pdf
    • https://agrimal.pl/userfiles/file/88157107268.pdf
    • http://www.ibadirect.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606cebd245bb6---kadekotuwezizogaxuvijawux.pdf
    • http://pericosrentcar.com.mx/wp-content/plugins/formcraft/file-upload/server/content/files/16072519069beb---lejiva.pdf
    • http://securitydirect.it/wp-content/plugins/super-forms/uploads/php/files/969b9532ff5a73444ecac5eae2d33a74/refozuf.pdf
    • https://hsegroup.ru/wp-content/plugins/super-forms/uploads/php/files/gsflu7p39mn1ailuiph54rvq81/71943087308.pdf
    • http://gursakaryahukuk.com/images/file/14667694461.pdf
    • https://unitedcardsolutions.com/wp-content/plugins/formcraft/file-upload/server/content/files/160773a9d74755---basimefogasopa.pdf
    • http://ninda.vn/userfiles/files/daruwijufikinonobejudog.pdf
    • https://lerong.vn/wp-content/plugins/super-forms/uploads/php/files/853e0b700045b4b400455977f9bfc7d8/28902442427.pdf
    • http://www.gamylai.vn/uploads/files/65682277092.pdf
    • http://boulderdivorcelaw.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607a25959a06d---12456799672.pdf
    • https://nepalimodelagency.com/userfiles/file/99645260257.pdf
    • https://www.andimoda.com/wp-content/plugins/super-forms/uploads/php/files/a36c4e8be7bc5660840a2d21ad468d0c/20101331698.pdf
    • http://bellezaeimagen.com.mx/wp-content/plugins/formcraft/file-upload/server/content/files/1607798eee6992---72987709658.pdf
    • https://www.amiunaorchestra.ro/wp-content/plugins/formcraft/file-upload/server/content/files/160a2555708726---naketejorixinipokawekubu.pdf
    • http://asckhn.com/acskhn/userfiles/file/pepuwijegofukerataf.pdf
    • 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_off0000f69f.bin
86d0d889c0e70459965983f7b1267fde1a7f41c3a5200f0d46e4975f0e5d63a6		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF69F 10632 bytes
font_01_sfnt_off00010f02.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10F02 16792 bytes
font_02_sfnt_off00012714.bin
a1c5a4e878edee3a8b107cf384c9af0c043a53f8a56c639116b6dba78d8c1f4a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x12714 16816 bytes

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