Malicious PDF — malware analysis report

Static analysis result for SHA-256 2e86afd4711670de…

MALICIOUS

PDF

74.8 KB Created: 2021-09-17 21:24:31 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: e0c8df99f4ab3614bd3fe07aac646dcf SHA-1: 3bb3da5adfe1a2d404c1761af40faed83cc7e9de SHA-256: 2e86afd4711670de9d76fb5f02961d1ef729935c3d5808e3e2cdc26fa3bb9da9
156 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, many of which point to compromised WordPress sites or disposable hosting, indicating a link farm designed to redirect users. The ClamAV detection and ML classifier strongly suggest malicious intent, likely phishing or malware delivery. The file's structure and URL patterns are consistent with a malicious PDF dropper.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9973

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=the+lion+king+dual+audio PDF link annotation
    • https://tanhaithanhvalves.com/quangcao/admin/file/rapokezewuse.pdfIn PDF document text
    • http://355353.ru/userfiles/file/80487910730.pdfIn PDF document text
    • https://perfectsextherapy.com/public_html/userfiles/file/gigalibid.pdfIn PDF document text
    • http://bjoybrands.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613972291bc66---fuluz.pdfIn PDF document text
    • http://nuestratierrapremios.com/campannas/file/21315257110.pdfIn PDF document text
    • http://i-p-p-c.com/ckfinder/userfiles/files/fafokinupejiforuluvifas.pdfIn PDF document text
    • https://kluchar.net/klucharnet/images/file/tabivusemosegodot.pdfIn PDF document text
    • https://montpellier-business-plan.com/mbp/upload/images/images/upload/ckfinder/61791476634.pdfIn PDF document text
    • https://navliecky.net/userfiles/file/34137465443.pdfIn PDF document text
    • http://zadonskiy.ru/wp-content/plugins/formcraft/file-upload/server/content/files/16136c370c03e2---85803287689.pdfIn PDF document text
    • http://dydlhx.com/upfiles/file///rikan.pdfIn PDF document text
    • http://lnshiyue.com/userfiles/file/20210902042944_1879349106.pdfIn PDF document text
    • https://123kozijnofferte.nl/wp-content/plugins/super-forms/uploads/php/files/257b6bd7383ade81b1c8116c2f71edd8/luxelekeforizije.pdfIn PDF document text
    • http://xn--80aiddhbkcq5bcaz.xn--p1ai/upload/files/31345874016.pdfIn PDF document text
    • http://chinasoftcore.com/userfiles/file///veradizoda.pdfIn PDF document text
    • https://ekoelprom.pl/public/images/editor/file/56379809569.pdfIn PDF document text
    • https://sayurmateng.com/contents/files/85522639379.pdfIn PDF document text
    • http://pnc21.com/files/fckeditor/file/14714658476142a9065f919.pdfIn PDF document text
    • http://www.canadiantreasurer.com/wp-content/plugins/formcraft/file-upload/server/content/files/1614209063e773---vilasilunifu.pdfIn PDF document text
    • http://lisaarkinlaw.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/31260680835.pdfIn PDF document text
    • http://optikametuje.cz/userfiles/file/30793941143.pdfIn PDF document text
    • https://bengalroys.com/ckfinder/userfiles/files/nasosidigawuvapuzexujeg.pdfIn PDF document text
    • http://okna-kurska.ru/page_edit/_samples/userfiles/files/dasanoxadofufu.pdfIn PDF document text
    • https://altstudio.be/app/webroot/uploads/file/34992537327.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_off0000c203.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC203 17352 bytes
SHA-256: 5c84e7e763773dc3f14cf54c7bec4da04caf952176befb040bef5f89d4b5280c
font_01_sfnt_off0000eea7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEEA7 10316 bytes
SHA-256: b8068bf1bc84c3fdaecddd56d9ad251bf59da9776434d359cc001aaa6e513562
font_02_sfnt_off00010593.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10593 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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