Malicious PDF — malware analysis report

Static analysis result for SHA-256 0209c1a11fdfdc8f…

MALICIOUS

PDF

68.1 KB Created: 2021-09-23 06:06:16 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: a6c30e4f5dd1daa3e0edc81d0041904d SHA-1: d46ec4224dd7398f91353ae2c349b37feb72db61 SHA-256: 0209c1a11fdfdc8f674f3cba279ad569733fa40ed2ef82bd8bccde87dd77fb4d
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript and multiple URLs pointing to compromised WordPress sites, indicating a link farm designed to lure victims. ClamAV detection as 'Pdf.Phishing.Trojan' further supports a malicious intent, likely phishing or malware distribution. The embedded JavaScript is likely used to facilitate the redirection or exploit vulnerabilities.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9957

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://halobysciton.com/wp-content/plugins/formcraft/file-upload/server/content/files/16136f60b8f8a3---35283390347.pdf
    • https://terrebleue.org/userfiles/file/13560463009.pdf
    • https://www.mybizwebsites.com/wp-content/plugins/formcraft/file-upload/server/content/files/1614ba52fd82d3---wefegokufetog.pdf
    • https://edukiya.com/wp-content/plugins/super-forms/uploads/php/files/b2427c4da377d342c8ce48bbb76382ee/givijemu.pdf
    • http://novosib-sport.ru/ckfinder/userfiles/files/kotizenegolevelefagefet.pdf
    • https://prtl.pl/userfiles/file/kobajalivixus.pdf
    • http://planet-for-events.de/userfiles/file/81827617054.pdf
    • http://shyjjc.com/v15/Upload/file/20219132051444260.pdf
    • http://linuxnewyork.com/draft/media/rolonal.pdf
    • http://apcmagon.com/userfiles/jabemabolobevuzevibabub.pdf
    • http://artepcb.com/upload/files/zawoganajasovojodu.pdf
    • https://www.traveltimevipp.com/wp-content/plugins/super-forms/uploads/php/files/052d30f57ad331b7a6bdbe34906de74e/kuxazigelemamovozoxi.pdf
    • http://superfasttv.com/uploads/files/80559699817.pdf
    • http://fese.in/ienupdimages/images/files/23474107922.pdf
    • http://ibtaker.ps/userfiles/file/fifelotetesimejud.pdf
    • https://aaaxxion.info/images/file/96518395578.pdf
    • http://sntaviator.ru/ckfinder/userfiles/files/suninudatawivutifumidusog.pdf
    • https://silatur.com/js/ckfinder/userfiles/files/39143402509.pdf
    • https://khyatiinfotech.biz/ckfinder/userfiles/files/surekibonididozugipago.pdf
    • http://salonlomi.pl/wp-content/plugins/formcraft/file-upload/server/content/files/1614b82c56f2ad---gumanet.pdf
    • http://sk-massimo.com/js/upload/files/wizik.pdf
    • http://thekitchendesignstudio.org/uploads/files/54003071248.pdf
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/FevRqgeaUVY/uplcv?utm_term=logo+quiz+level+3+logo+28
    • http://crossfit28.com.s125853.gridserver.com/siteuploads/editorimg/file/59707733582.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_off0000aefd.bin
865239573fb1af7e37978783d5f180889112fe85f1f83a4870d6afc0e6ce8042
pdf-font-stream PDF embedded font (sfnt) at offset 0xAEFD 14428 bytes
font_01_sfnt_off0000d343.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0xD343 16792 bytes
font_02_sfnt_off0000eb5a.bin
fced1f217a8c5bd83e14ed3c3c27ecbb28ce2f088545c51aa1d605a5128e75ef
pdf-font-stream PDF embedded font (sfnt) at offset 0xEB5A 10480 bytes