Malicious PDF — malware analysis report

Static analysis result for SHA-256 63c6a400d487af0a…

MALICIOUS

PDF

83.9 KB Created: 2021-09-02 10:28:29 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-05
MD5: 1a3227f884d811dd8c38f08e6c32abea SHA-1: 4a20a48dc7cf0339f1d66a8233e509f6de15052d SHA-256: 63c6a400d487af0a1883093554b3cedbdea1146e06b2170a9c18be53b0e501d6
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript and numerous external links, many pointing to compromised WordPress sites, indicating a phishing or malware distribution attempt. The ClamAV detection and ML classifier strongly suggest malicious intent, likely to lure users to malicious sites via the link farm.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9983

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.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • 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://garglob.ru/uplcv?utm_term=p83+wanad+for+sale PDF link annotation
    • https://www.tifdip.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609f9d59a5e78---13633080742.pdfIn PDF document text
    • https://glbtrader.com/userfiles/file/16180359986.pdfIn PDF document text
    • http://www.vegagastro.pl/upload/file/35887151254.pdfIn PDF document text
    • https://whitelightdesign.com/wp-content/plugins/super-forms/uploads/php/files/05e49127616087fe037f327184a0fd9d/jakabemojisemumowatukab.pdfIn PDF document text
    • https://rjiminfra.com/wp-content/plugins/super-forms/uploads/php/files/l1p2v440pabe0gi6dtqn6k9pg3/77381911310.pdfIn PDF document text
    • http://ahlhy.com/uploads/file/141000404305.pdfIn PDF document text
    • https://brylka-kfz.de/wp-content/plugins/formcraft/file-upload/server/content/files/160a738fd0b1b3---jegiwamisaso.pdfIn PDF document text
    • http://bascobrunswick.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/1609ea5addec13---9907326121.pdfIn PDF document text
    • http://ueros.fr/admin/ckfinder/userfiles/files/galojul.pdfIn PDF document text
    • https://aadhaarretail.com/administrator/imagetemp/file/xuguvub.pdfIn PDF document text
    • http://www.trimbleexpress.sk/wp-content/plugins/formcraft/file-upload/server/content/files/160c454fddae45---nonotuzu.pdfIn PDF document text
    • http://mesotects.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ad5bf8bcb1f---53461041356.pdfIn PDF document text
    • https://leunamgroup.com/wp-content/plugins/super-forms/uploads/php/files/59f07adb567ec3564189ea2dc9d5cb2c/49432163642.pdfIn PDF document text
    • https://tungafilm.com/dorceiys/ckfinder/userfiles/files/49342753082.pdfIn PDF document text
    • http://hilltop1976.com/clients/24685/File/79517152048.pdfIn PDF document text
    • http://zrdb-drogbud.pl/Upload/file/24526504672.pdfIn PDF document text
    • http://volvo-cars.jp/js/upload/files/95414417929.pdfIn PDF document text
    • https://amezdigital.com/wp-content/plugins/super-forms/uploads/php/files/a81b38fe60db747467080157c046cb92/49351828447.pdfIn PDF document text
    • http://escolacaritas.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c0673123b58---loselesevo.pdfIn PDF document text
    • http://srsheicha.com/uploadfile/file/91958300923.pdfIn PDF document text
    • http://thedreaminitiative.org/Content/Admin/uploads/files/pirukutebewijivujasir.pdfIn PDF document text
    • http://samuiluxurytravel.com/Uploads/file/42587204686.pdfIn PDF document text
    • http://0-50.ru/userfiles/file/39345924443.pdfIn PDF document text
    • https://vinatech.com/userfiles/file/fowisevemelegex.pdfIn PDF document text
    • http://aite-materials.com/upfiles/file/63817033226.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_off0000d9b8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD9B8 20364 bytes
SHA-256: 4f0c1e20213610e3decbdf440febefd32f520a481aa2fa7895b5b3838f9054e9
font_01_sfnt_off00010f39.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10F39 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00012750.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12750 10624 bytes
SHA-256: 7fe08da51c169bdb07b46aec984459acd23d526d7c9b7e30f33c4095182cef74