Malicious PDF — malware analysis report

Static analysis result for SHA-256 2b331ef2114aa15f…

MALICIOUS

PDF

88.9 KB Created: 2021-09-02 12:17:16 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-05
MD5: c76e42191d0c9b716216ddd54d30ec4a SHA-1: b36c7433e6701b23cd0b09a57af491c4d8c127f2 SHA-256: 2b331ef2114aa15f5ecb9a7d174aa4f592e0ac6bd5aee66a5de85cf421d6d1dd
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF file was identified as malicious by ClamAV and an ML classifier. It functions as a link farm, containing numerous URLs that point to external resources. Several of these URLs lead to compromised WordPress sites, suggesting an attempt to leverage these platforms for distributing malicious content or conducting phishing attacks. The presence of multiple distinct hosts and the use of 'utm_term' parameters indicate a coordinated effort to lure users to potentially harmful websites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9976

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://synerhu.ru/uplcv?utm_term=en+s%C4%B1k+kullan%C4%B1lan+phrasal+verbs+listesi+pdf PDF link annotation
    • https://www.blackandwhite-salon.com/wp-content/plugins/super-forms/uploads/php/files/10004b8fb5ff2fe9b59b220c356529f9/1221812843.pdfIn PDF document text
    • https://ptogel2.com/contents//files/lewir.pdfIn PDF document text
    • http://www.roosprommenschenckelfoundation.nl/ckfinder/files/files/lifix.pdfIn PDF document text
    • https://sweetestspaparty.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a5b695dd8c3---47964356120.pdfIn PDF document text
    • http://scsytech.com/upload/files/sudoxotefejijunipemesa.pdfIn PDF document text
    • http://antwerp-reefer-tournament.be/argt/files/51057512053.pdfIn PDF document text
    • http://www.hypnotiseur.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c52a6d4bc7c---dotuk.pdfIn PDF document text
    • http://www.redactordecontenidos.eu/wp-content/plugins/formcraft/file-upload/server/content/files/16071535dcc5b9---pinomotaxebib.pdfIn PDF document text
    • http://yoron.net/up/files/98710485587.pdfIn PDF document text
    • https://archltginc.com/wp-content/plugins/super-forms/uploads/php/files/c3e2784f86bd7bf06ecdfbe7d4983f78/vatotonine.pdfIn PDF document text
    • http://kapfenberger-schuetzenverein.at/userfiles/file/zopabo.pdfIn PDF document text
    • https://autotrilogy.com/wp-content/plugins/super-forms/uploads/php/files/0202184d206fdfa054af52571a0e5828/15940377440.pdfIn PDF document text
    • http://connect-senior.ch/uploades/userfiles/file/54244666606.pdfIn PDF document text
    • https://sambelteri.com/contents//files/14405647003.pdfIn PDF document text
    • http://www.cenlafilm.com/siteuploads/editorimg/file/rapupogezedetemuzomux.pdfIn PDF document text
    • https://www.schroedersales.com/wp-content/plugins/super-forms/uploads/php/files/caf0dd02577362abb54acda20b1ea6e3/30871980733.pdfIn PDF document text
    • http://asbu.net/uploads/FCK_files/file/belip.pdfIn PDF document text
    • https://www.auditek.fr/wp-content/plugins/formcraft/file-upload/server/content/files/160f613598e26f---nugizifopafajomifupuzip.pdfIn PDF document text
    • http://vytvarnyobchod.cz/UserFiles/File/21447471759.pdfIn PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b303e87b708---2043231652.pdfIn PDF document text
    • https://fundacjaartfreeart.pl/userfiles/file/fekuw.pdfIn PDF document text
    • http://iphysiology.ru/upload/48686445962.pdfIn PDF document text
    • http://sjar-tech.com/uploadfile/file///2021081516224573.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_off0000f45e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF45E 10904 bytes
SHA-256: 030d11b4a0b1935c7ecfbfc85e604cfc7729b1592ea56355ac9478a5651b5e87
font_01_sfnt_off00010d31.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10D31 18900 bytes
SHA-256: 9dd6650acfb8574808210aa8cde34f5febd6b0595ae73343004e55759ca20e67
font_02_sfnt_off00013ada.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13ADA 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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