Malicious PDF — malware analysis report

Static analysis result for SHA-256 2286e586a83055d7…

MALICIOUS

PDF

83.8 KB Created: 2021-08-02 18:36:42 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14
MD5: ab84eb9cd92e513d09b1d8abb1c3e553 SHA-1: a215c9024a0b6641681b5e55f41d16f996a49f59 SHA-256: 2286e586a83055d7a68df95a50a9d32de0aced14f10472656d6bcdca56da5944
156 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The heuristics reveal it functions as a link farm, containing numerous URLs pointing to compromised WordPress upload directories and other disposable hosting. These links likely lead to phishing pages or further malware downloads.

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 https://law.com.sg/wp-content/plugins/super-forms/uploads/php/files/b682aadb45739eefaf1a8e55233e2f6b/todoboxod.pdf In PDF document text
    • http://www.nationaalgolfcongres.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1606ceecd96577---pexono.pdfIn PDF document text
    • http://grupogmec.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b9831dbfb9c---98594956590.pdfIn PDF document text
    • https://tempatpasang.com/contents//files/5511878625.pdfIn PDF document text
    • https://nikosdimos.gr/userfiles/file/paximopozepanenozuferiw.pdfIn PDF document text
    • https://iominneapolis.com/wp-content/plugins/super-forms/uploads/php/files/eaeadd199f6fe03afc2965628c5f2b79/23218930405.pdfIn PDF document text
    • http://oneself.pro/wp-content/plugins/formcraft/file-upload/server/content/files/1607dfc0968283---19199652442.pdfIn PDF document text
    • http://for-rent-leuven.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b63f639d6b8---vemonofolaxilujo.pdfIn PDF document text
    • https://hansenlight.com/UploadFile/files/22870734215.pdfIn PDF document text
    • http://nyitotthaz.hu/userfiles/files/86567527777.pdfIn PDF document text
    • http://www.skupp.pl/wp-content/plugins/formcraft/file-upload/server/content/files/16097e0d6bfba4---16533870689.pdfIn PDF document text
    • http://ecohouse-lab.com/userfiles/file/dunezenamoxajivi.pdfIn PDF document text
    • http://morethancars.nl/uploads/edytor/file/savujugasujakupu.pdfIn PDF document text
    • http://www.holzbau-hoelzl.at/wp-content/plugins/formcraft/file-upload/server/content/files/160cb178309725---wawodotujuwigeniwo.pdfIn PDF document text
    • https://toromecanicorodeo.com/files/sowow.pdfIn PDF document text
    • http://farmaciafasolis.eu/userfiles/files/kibopomizivufotekofiwo.pdfIn PDF document text
    • http://conservationenergy.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606cfd09f2cee---451184396.pdfIn PDF document text
    • https://jfefood.com/wp-content/plugins/super-forms/uploads/php/files/69b52d4abb047b153d0745c9d40c90e6/52487957022.pdfIn PDF document text
    • http://rowanfamilyreunion.com/clients/28915/File/vabozesivupumetalor.pdfIn PDF document text
    • https://dacola.com/upload/files/mivulozorax.pdfIn PDF document text
    • https://jagominum.com/contents//files/40891259869.pdfIn PDF document text
    • http://keemunblacktea.cn/uploads/file/271656392864.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/3vuEKuznOb8/uplcv?utm_term=blackberry+os+android+appsPDF 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_off0000e427.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE427 16984 bytes
SHA-256: 26211289c6df53d086389dc5eb644c9d707da347f9449058f1074666602bf5c4
font_01_sfnt_off00011090.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11090 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off000128a7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x128A7 10808 bytes
SHA-256: 33926f69ad3d089e064531310052893ab217de607e64bd64593db3eb2d56d3fc

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