Malicious PDF — malware analysis report

Static analysis result for SHA-256 07df9ba03d43f4c8…

MALICIOUS

PDF

79.7 KB Created: 2021-09-07 04:57:59 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: 679e53d85a123c1d26be9daeec513f6d SHA-1: 8d17e0ac4016f24c45ddc6011ef6fb220ac3edcb SHA-256: 07df9ba03d43f4c8df96ed10b71f3fb0881d70fcab6c1541e7709a2cccce6f23
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, indicating a high likelihood of malicious intent. The heuristics reveal it functions as a link farm, directing users to multiple potentially compromised websites, some hosted on disposable domains. The presence of embedded URLs and the nature of the heuristics suggest it is designed to facilitate phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

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://only-svet.ru/upload/files/pirotiwosemezap.pdf In PDF document text
    • http://africansafaris-spain.com/FCKeditor/editor/filemanager/connectors/php/connector.php?Command=FileUpload&Type=File&CurrentFolder=%2Ffile/wizumaguwonebapejavux.pdfIn PDF document text
    • https://www.bouwenaaneensterkwerkgeversmerk.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160d222e35f77b---tuzinolisugop.pdfIn PDF document text
    • https://smarttactic.ro/wp-content/plugins/formcraft/file-upload/server/content/files/160acf2247207b---67835653348.pdfIn PDF document text
    • http://accronline.com/userfiles/file/25135741077.pdfIn PDF document text
    • https://jfefood.com/wp-content/plugins/super-forms/uploads/php/files/e30d2db2ccf7954c4819de0eaced84c9/90106772148.pdfIn PDF document text
    • https://veritiesinstitute.com/wp-content/plugins/super-forms/uploads/php/files/c849a511e9704e4c143413c0363c9b37/buzuputadu.pdfIn PDF document text
    • https://osikovo.eu/webroot/img/content/files/75925332600.pdfIn PDF document text
    • http://rqconsultores.com/userfiles/file/bobosiweba.pdfIn PDF document text
    • https://sckprime.com/wp-content/plugins/super-forms/uploads/php/files/8140be6402e8d12de1e1a59a44aa31a6/fewisewopagijon.pdfIn PDF document text
    • http://www.davidwoodpersonnel.com/wp-content/plugins/formcraft/file-upload/server/content/files/16077989238bff---tovapilaz.pdfIn PDF document text
    • http://tienhasteel.com/app/webroot/upload/files/woxenilazoziwuvog.pdfIn PDF document text
    • http://zovsh.com/Uploadfiles/files/rojiremoko.pdfIn PDF document text
    • http://usaoxin.com/userfiles/2021-5/file/lilunataxane.pdfIn PDF document text
    • https://beaumont-residence.com/wp-content/plugins/super-forms/uploads/php/files/dciqcfk7qrk0500kt4hldv3mk3/pazaxaxote.pdfIn PDF document text
    • http://www.polni.si/Images/files/29547795210.pdfIn PDF document text
    • https://ontime-taxi.kg/wp-content/plugins/super-forms/uploads/php/files/b5d52f2ce0b30aa2fa557188e9dbed66/15054834612.pdfIn PDF document text
    • http://www.naturapreserved.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608647cc5b0ad---50002233732.pdfIn PDF document text
    • https://soba05.org/wp-content/plugins/super-forms/uploads/php/files/58ef81c3d296c87eb810faf65b938f48/puwalirajob.pdfIn PDF document text
    • https://csom.cz/wp-content/plugins/super-forms/uploads/php/files/03b60c121c75b90dc7a002e04c7bb678/vadipoluxuxivo.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/fzgW7-mxBc0/uplcv?utm_term=subject+and+predicate+worksheet+pdf+grade+5PDF 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_off0000cf44.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCF44 11608 bytes
SHA-256: 06c700d942082ca15710b89015f6507a610876a49ac4b18fcc5c04c65312a714
font_01_sfnt_off0000ea7d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEA7D 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0001028f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1028F 18048 bytes
SHA-256: c083f22d2c7ac1fe2bc9331f64cacf72eacfcf61178bb91a08d9aeb8dd57d852

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