Malicious PDF — malware analysis report

Static analysis result for SHA-256 ce59b86c3749800a…

MALICIOUS

PDF

84.0 KB Created: 2021-09-05 00:15:57 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: 90add985f182288962c63b51e7a14167 SHA-1: 72518db1e63a06028555d7b1191c9f61468dcd20 SHA-256: ce59b86c3749800a73d4703d598f81853b1e56367bbcafcfd8dc8321fb574b4c
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged by a machine learning classifier and ClamAV as malicious. It contains numerous external URLs, many of which point to compromised CMS upload directories or are hosted on disposable domains, indicating a link farm designed to redirect users. The presence of these links suggests the primary purpose is to direct users to malicious websites for phishing or further malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9990

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://oniceh.ru/uplcv?utm_term=situational+analysis+format+pdf PDF link annotation
    • http://bkmarine.net/ckfinder/userfiles/files/1630755130.pdfIn PDF document text
    • https://gtselect.fr/ckfinder/userfiles/files/56531929202.pdfIn PDF document text
    • https://sipare.com.ar/wp-content/plugins/super-forms/uploads/php/files/q5srvco198bv3idol313379dsf/19451815950.pdfIn PDF document text
    • https://signaturetowerpune.com/wp-content/plugins/super-forms/uploads/php/files/ukicb8s917qtvk2nfr3vh8egg2/3219455244.pdfIn PDF document text
    • http://giovanninociti.com/userfiles/files/porikepepunanitak.pdfIn PDF document text
    • http://vertracapital.com/uploads/files/rodarirekemaratabe.pdfIn PDF document text
    • https://laser123.com/geektic/files/3246325108.pdfIn PDF document text
    • http://www.pirac.org/wp-content/plugins/super-forms/uploads/php/files/4a9b5d74ba68ec136331bc90e5060711/56696952711.pdfIn PDF document text
    • https://mashura.co/userfiles/files/12191216666.pdfIn PDF document text
    • http://www.annaleehuber.com/content_files/file/82277693451.pdfIn PDF document text
    • http://koopmankennedyfeller.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/jukekuzinikekofekeli.pdfIn PDF document text
    • https://webrobogo.hu/kepek/vakefajosixe.pdfIn PDF document text
    • https://cdmsig2.com/ckfinder/userfiles/files/guredezevogudag.pdfIn PDF document text
    • http://jjmcp.jp/userfiles/Image/file/xafulomugilovowagi.pdfIn PDF document text
    • https://klingende-zeder.de/wp-content/plugins/formcraft/file-upload/server/content/files/1609411aa0a077---zemozudufidupijonifatesi.pdfIn PDF document text
    • http://tipsclubcr.com/campannas/file/zutugufewetaziji.pdfIn PDF document text
    • http://www.jucadent.es/ckfinder/userfiles/files/rowivowibuvuromex.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_off0000e316.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE316 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000fb28.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFB28 18176 bytes
SHA-256: 21f37f11cdd171eed4393cacfcf7b66ca93067a2eb5bc57db534c108a2b2982b
font_02_sfnt_off000129e1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x129E1 10816 bytes
SHA-256: 1ec8a83b67b807d6fa2ad330269cec05fa1757ad58ec958a62caf24545eaf072

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