Malicious PDF — malware analysis report

Static analysis result for SHA-256 9c7e35505c111457…

MALICIOUS

PDF

85.7 KB Created: 2021-08-20 03:42:08 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: 362d493f6c45a7c4c46b9ae1943b7111 SHA-1: e30237b5fd351662e51f5c5489c228760f879eb3 SHA-256: 9c7e35505c1114570a2f06e5936af9da96dd806184258c961654a904dec9a19e
156 Risk Score

Malware Insights

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

The PDF contains numerous links, many of which point to external websites hosted on compromised CMS platforms, indicating a phishing or malicious redirection attempt. The ClamAV detection and ML classifier strongly suggest malicious intent, likely related to phishing or malware distribution through these links. No scripts were extracted, but the structure and URL analysis point to a link farm designed to lead users to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9978

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://whitelightdesign.com/wp-content/plugins/super-forms/uploads/php/files/5d0f03fdf0b8ca861631f4acaf5bb5af/94433454157.pdf In PDF document text
    • http://aksaaydinlatma.com/img/editor/image/file/69146581148.pdfIn PDF document text
    • http://anhbanglaw.com/userfiles/file/gabupik.pdfIn PDF document text
    • https://lyna-garage.com/htdocs/cljr/data/files/rezepezobodogutuw.pdfIn PDF document text
    • http://animationcoach.com/userfiles/file/26293763159.pdfIn PDF document text
    • https://414movement.com/wp-content/plugins/super-forms/uploads/php/files/080d0a92d115d7f7ae43274de8f4da74/pinixuj.pdfIn PDF document text
    • http://quiltingacademy.net/fckeditor/userfiles/file/10181264085.pdfIn PDF document text
    • http://www.myhhsi.com/wp-content/plugins/super-forms/uploads/php/files/4a19a1ac954d88d7f624e4c9bc2e3161/kegaxetapiv.pdfIn PDF document text
    • http://lichnyiybrand.ru/wp-content/plugins/formcraft/file-upload/server/content/files/1607347263c60e---lumopikos.pdfIn PDF document text
    • http://mmbc.cz/_data/user_files/file/voral.pdfIn PDF document text
    • http://buffagiuseppeinfissi.com/userfiles/files/89250103526.pdfIn PDF document text
    • https://brylka-kfz.de/wp-content/plugins/formcraft/file-upload/server/content/files/160b05c2b438ef---90320611256.pdfIn PDF document text
    • https://shriayurvednagpur.org/public/ckfinder/userfiles/files/noratune.pdfIn PDF document text
    • https://bettenbaehren.de/wp-content/plugins/formcraft/file-upload/server/content/files/16078e2cfc7950---lorebupalijoridinuriwapo.pdfIn PDF document text
    • https://www.foundationofhope.org/wp-content/plugins/formcraft/file-upload/server/content/files/1607cacae114b8---jazaxefetakusolomumejo.pdfIn PDF document text
    • http://www.pointcookelectrician.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/1609cfaf1305cf---xexukojazofezinetula.pdfIn PDF document text
    • http://snookerfootball.eu/wp-content/plugins/formcraft/file-upload/server/content/files/160813b701daa6---jupuvivedizawufonin.pdfIn PDF document text
    • https://luxmarketing.agency/wp-content/plugins/super-forms/uploads/php/files/9l033uv5tic2pl9leh82d563uo/gurasifevozamo.pdfIn PDF document text
    • http://peaceinsrilanka.lk/userfiles/file/50904604936.pdfIn PDF document text
    • http://komputerzagrosze.pl/userfiles/file/mupanejukujexatekofawek.pdfIn PDF document text
    • https://krantiservice.com/ckfinder/userfiles/files/43753279065.pdfIn PDF document text
    • http://asalsold.com/wp-content/plugins/formcraft/file-upload/server/content/files/160986a817d39f---doxuto.pdfIn PDF document text
    • http://fedoro.ru/upload/file/80868259787.pdfIn PDF document text
    • https://ooo-kenk.ru/userfiles/file/petitukitin.pdfIn PDF document text
    • http://sendedianqi.com/upload_fck/file/2021-8-5/20210805075452345319.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/1xuhb7AK25c/uplcv?utm_term=alcatel-lucent+ip+touch+4028+manual+espa%C3%B1olPDF 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_off0000e399.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE399 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000fbab.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFBAB 18896 bytes
SHA-256: 885576500bdfd25642cdc29d8f51815a554d090260ff41d90b859c8bfd3a4906
font_02_sfnt_off00012aee.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12AEE 11388 bytes
SHA-256: c545812a9f3abb9b868c4f6167609ed57f3a77f4689133647d7d7d4266b2c7f5

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