Malicious PDF — malware analysis report

Static analysis result for SHA-256 cc96274129da15dd…

MALICIOUS

PDF

112.4 KB Created: 2021-08-12 01:06:14 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: b923f2fd51d0f118b85b5348fcfefd09 SHA-1: 201e9bdcd9d83fd27b2f302d5e33122afe5dc4d1 SHA-256: cc96274129da15dd4d0e6e4b32d9ad174abe6c0f86a26304c9f64daa532b7388
156 Risk Score

Malware Insights

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

This PDF file was flagged as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. It contains numerous external URIs and link farm patterns, suggesting it's designed to redirect users to potentially harmful websites. The presence of multiple compromised CMS upload links further supports this, as these are often used to host malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9974

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://catamma.ru/uplcv?utm_term=intermediate+accounting+ifrs+3rd+edition+pdf PDF link annotation
    • http://stellarp.com/userfiles/files/58255740213.pdfIn PDF document text
    • https://aimara-bg.com/userfiles/file/22396733047.pdfIn PDF document text
    • http://www.ausafrica.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/160c5209681a79---ruluzuwaz.pdfIn PDF document text
    • https://sygimportaciones.com/wp-content/plugins/super-forms/uploads/php/files/qgif8fpffgpd8d56gst56gv5gp/37810558807.pdfIn PDF document text
    • http://www.stratcareerservices.com/wp-content/plugins/formcraft/file-upload/server/content/files/160711fc13cd59---xovazogot.pdfIn PDF document text
    • https://ewms.vn/wp-content/plugins/super-forms/uploads/php/files/2l89g4lft892mnlk16a6k04k6m/fipasogewuse.pdfIn PDF document text
    • http://forumcutuca.com/ckfinder/userfiles/files/7958622104.pdfIn PDF document text
    • http://servicedental.it/userfiles/files/66008472873.pdfIn PDF document text
    • http://soupworld.de/upload/file/30826379883.pdfIn PDF document text
    • https://agilitynd.com/wp-content/plugins/super-forms/uploads/php/files/4682a72365717d047acf45e0123a9784/vagona.pdfIn PDF document text
    • https://www.helpagesl.org/wp-content/plugins/formcraft/file-upload/server/content/files/16082c21db6f90---mefukanokugar.pdfIn PDF document text
    • https://getlovebooks.com/wp-content/plugins/super-forms/uploads/php/files/48d618630ad05ff484ffa6b05942d0cd/sivinukejomap.pdfIn PDF document text
    • https://itracmediav5.com/ckfinder/userfiles/files/75764327034.pdfIn PDF document text
    • http://6nergy.fr/6nergy/sites/default/user/file/19748715305.pdfIn PDF document text
    • http://tvoirostov.ru/ckfinder/userfiles/files/51001598025.pdfIn PDF document text
    • https://loskutova.site/wp-content/plugins/super-forms/uploads/php/files/8917072ddf4b03bf487c31b99d52d672/87654347090.pdfIn PDF document text
    • https://adepotcustom.com/UploadFiles/file/20210430182753187.pdfIn PDF document text
    • http://gianphoiduyloimodel.com/Images_upload/files/41540941351.pdfIn PDF document text
    • http://zespolbahamas.pl/zdjecia/file/rivurexazemenibapijuvusik.pdfIn PDF document text
    • http://nordicaluminium.ru/userfiles/file/fumujudamov.pdfIn PDF document text
    • https://www.ijdsir.com/ckfinder/userfiles/files/belodapanozowusi.pdfIn PDF document text
    • http://seanbittinger.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/jiponotozetalufefumuwawi.pdfIn PDF document text
    • https://edbcagliari.it/file/tapexirutuvoxufewavuwelal.pdfIn PDF document text
    • http://email-database.info/userfiles/file/wagifo.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_off0001548b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1548B 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off00016c9d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x16C9D 17388 bytes
SHA-256: 0852d2bfb14237751fd4661b62677c068a4a67e8579362a8264641a5af63804c
font_02_sfnt_off000199da.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x199DA 11140 bytes
SHA-256: 2d1232bc6c621d0cee3b8a669ffadd8d599d427ab80e304446ff7d7e330abf48

Open this report in the interactive analyzer, or submit your own file for analysis.