Malicious PDF — malware analysis report

Static analysis result for SHA-256 0e998a7f8a3477a9…

MALICIOUS

PDF

81.7 KB Created: 2021-09-08 05:28:18 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-05
MD5: bdb2300e032bf877fd3b2e811593b3e1 SHA-1: 08e95f8379b190981317ae3a764ec07015c86678 SHA-256: 0e998a7f8a3477a911f1a83c3463466be904a3ee93d15b4528a0f2c076d233a3
156 Risk Score

Malware Insights

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

This PDF was flagged by multiple heuristics as malicious, including a critical ClamAV detection and an ML classifier. It contains numerous links to external websites, many of which are hosted on compromised CMS upload directories or disposable domains, suggesting a link farm designed to redirect users to malicious content. The presence of external URI links and the overall structure point towards a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9981

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 http://bjsprt.com/uploadfile/file///2021051920200410.pdf In PDF document text
    • http://pck.malopolska.pl/wp-content/plugins/super-forms/uploads/php/files/17a977ba2474d451c297251a28c439cb/57512392620.pdfIn PDF document text
    • http://boursemoi.fr/userfiles/file/suliradanufefu.pdfIn PDF document text
    • http://trenermichal.pl/wp-content/plugins/formcraft/file-upload/server/content/files/1607527c3526a4---57969375276.pdfIn PDF document text
    • https://www.karenlovelee.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608f8fff1871c---51709502459.pdfIn PDF document text
    • https://www.dekleinewerf.nl/wp-content/plugins/formcraft/file-upload/server/content/files/16089e5cfd5aab---dozovuduzu.pdfIn PDF document text
    • https://rffsev.ru/wp-content/plugins/super-forms/uploads/php/files/6f42ec8bc9bb91dbf05f647547c522a2/vesovuz.pdfIn PDF document text
    • https://eberli-medical-supply.ch/upload/file/vilezepez.pdfIn PDF document text
    • http://picassogift.com/Uploadfiles/files/73581716350.pdfIn PDF document text
    • https://118highschool.am/wp-content/plugins/super-forms/uploads/php/files/6bf3d900e710faf875cbd3816810e533/14575352943.pdfIn PDF document text
    • http://happy-land.hu/editor_up/lepibuz.pdfIn PDF document text
    • http://www.retorika-zidar.si/ckfinder/ckeditor_uploaded_files/files/xowijufisazopo.pdfIn PDF document text
    • http://etasystem.net/userfiles/files/tunokiradobilakekituda.pdfIn PDF document text
    • http://christschoolblr.in/userfiles/file/luvotupoz.pdfIn PDF document text
    • http://abwingssuffolk1.com/uploads/files/26285066595.pdfIn PDF document text
    • http://clubselectionvoyages.net/images/file/vabugokoderewomunuvil.pdfIn PDF document text
    • http://bamt.be/wp-content/plugins/formcraft/file-upload/server/content/files/1608734cd8dc29---28552966391.pdfIn PDF document text
    • http://qqsbg.net/uploads/file/10718371031.pdfIn PDF document text
    • http://mariekevanvlierden.nl/survey/userfiles/files/devolesutaxe.pdfIn PDF document text
    • https://lightupalife.org.uk/wp-content/plugins/formcraft/file-upload/server/content/files/16090890dcb651---63255313213.pdfIn PDF document text
    • https://wcfkenzi.com/ckfinder/userfiles/files/sogejuroniz.pdfIn PDF document text
    • http://humansharehouse.com/userData/board/file/66799580188.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/Om9ozkHLxGw/uplcv?utm_term=thanatopsis+full+text+pdfPDF 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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000dc1c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDC1C 17344 bytes
SHA-256: 57194c2e8c94d43c568aaaf58cf9248237a58c357c52e0bf73ab4bac838ce890
font_01_sfnt_off00010889.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10889 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off000120a0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x120A0 10660 bytes
SHA-256: 834c09b9e74d1b11f776f318c00b02878787e21d2f1989adfe9085981d7173c5

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