Malicious PDF — malware analysis report

Static analysis result for SHA-256 2413569d5f452734…

MALICIOUS

PDF

118.5 KB Created: 2021-07-03 14:19:03 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: 56dbb83a5c0d9920901f96e531562b95 SHA-1: fbb25f88d2c0f70867371d24a30ffcd0d4833709 SHA-256: 2413569d5f4527344de36eef2ce0f441c99067441333a690ec09e5e0ed15fe1b
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous links to external websites, many of which are hosted on compromised CMS platforms or appear to be part of a link farm. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or distributing further malware. While no scripts were explicitly extracted, the PDF structure and URL patterns suggest it's designed to redirect users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9920

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
  • 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://coachtourbusrental.com/wp-content/plugins/formcraft/file-upload/server/content/files/16086bd0d5a3e6---69004042574.pdf In PDF document text
    • http://redwoodpwr.com/wp-content/plugins/super-forms/uploads/php/files/p8fehubq11bjcsqfcksmgd3ls3/kenukozevof.pdfIn PDF document text
    • https://sitebyside.ru/wp-content/plugins/super-forms/uploads/php/files/8cbf8aa9853e3370d5c383e04a8d983c/riwad.pdfIn PDF document text
    • http://thedewakohchang.com/image/upload/File/41800217.pdfIn PDF document text
    • https://abofahed.com/userfiles/file/sajujeposejipeperedux.pdfIn PDF document text
    • http://geose.ru/userfiles/file/99379394323.pdfIn PDF document text
    • https://www.inter-tube.co.uk/wp-content/plugins/super-forms/uploads/php/files/9003823d8d36fcd35d8156e5b5c7ed14/99156972509.pdfIn PDF document text
    • http://fiumevivo.it/userfiles/files/jezobopel.pdfIn PDF document text
    • https://gtsonline.nl/wp-content/plugins/super-forms/uploads/php/files/poss0gfolthugm3jlot4sb9v77/jomuxaboxofimevipavuneke.pdfIn PDF document text
    • http://www.adatechotomasyon.net/wp-content/plugins/formcraft/file-upload/server/content/files/160a2bbbf13976---11934923394.pdfIn PDF document text
    • http://mfplus.ba/wp-content/plugins/formcraft/file-upload/server/content/files/160b0ccc4ad231---66363706192.pdfIn PDF document text
    • http://challendor.com/fckeditor/upload/file/94968066789.pdfIn PDF document text
    • http://www.xpresswedding.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a3fc528b60e---14918057420.pdfIn PDF document text
    • http://yuseigachi.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1607d65e9a30eb---surofexoxinasak.pdfIn PDF document text
    • https://netshopnepal.com/userfiles/file/21750207554.pdfIn PDF document text
    • http://www.allatpatikapecs.hu/images/file/67066480340.pdfIn PDF document text
    • http://neoneofitou.com/ckfinder/userfiles/files/luwezexazovo.pdfIn PDF document text
    • https://spazmedia.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b7ea638d502---pejefewowegujerowiw.pdfIn PDF document text
    • https://cupanghitam.com/contents//files/8998342766.pdfIn PDF document text
    • http://inistor.com/ufiles/files/jokerokapiparaxujugeno.pdfIn PDF document text
    • http://www.veronicaneal.com/wp-content/plugins/formcraft/file-upload/server/content/files/1/16080f5acc73ae---simazekejozipeguzinutoza.pdfIn PDF document text
    • http://clearlakesd.org/wp-content/plugins/formcraft/file-upload/server/content/files/160d533752b466---lexugowebavuvetefanag.pdfIn PDF document text
    • https://www.infrascale.com/wp-content/plugins/super-forms/uploads/php/files/d534755592639d7cfda58c41e322aa44/61110125350.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/Om9ozkHLxGw/uplcv?utm_term=lease+agreement+format+in+tamil+pdf+downloadPDF link annotation
    • 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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000156a2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x156A2 10884 bytes
SHA-256: c01d2d9260c3bc00bab93a0dc57150947ff8e8a75bfdb1ae01df5528b6a4e2b0
font_01_sfnt_off00016f9a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x16F9A 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off000187ac.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x187AC 17832 bytes
SHA-256: db8a8f1bbe046fec4265f3e72e40bf427e67428f7bdc3e3f842582427c3b9a80
font_03_sfnt_off0001b6b4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1B6B4 16092 bytes
SHA-256: 9d5144547e0b729630886a3ad3ce48e7da84b0115899dd9c2390406af6f0fecd

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