Malicious PDF — malware analysis report

Static analysis result for SHA-256 eb769443f7ced63a…

MALICIOUS

PDF

83.2 KB Created: 2021-09-03 15:48:53 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 0e35f481b08827b530ea7f3d2f00a489 SHA-1: 5db6da54d9d27190fca0f3507e1d5431884f470d SHA-256: eb769443f7ced63a7c7f9489c9eefb4554992bbc035188218152c98c1530f752
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous links to potentially compromised websites, suggesting a link farm or phishing lure. The presence of a ClamAV detection for 'Pdf.Phishing.Trojan' and ML classifier flagging further indicate malicious intent. While no explicit script was found, the structure and URL patterns are consistent with phishing campaigns that leverage compromised WordPress sites to host malicious documents.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9951

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://aliencosmicexpo.com/wp-content/plugins/formcraft/file-upload/server/content/files/16096aaf62843d---xoteredetexitejasupo.pdf
    • http://www.ochoadentalcare.com/tacgestorcontenidos_ochoa/documentos/file/
    • https://parisautotravel.com/wp-content/plugins/super-forms/uploads/php/files/ub3ujj4lkrhrhng09tmq471vo4/10162930879.pdf
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b5adcdea8df---38916381298.pdf
    • https://bacninhonline.com/webroot/img/files/gelepuravux.pdf
    • http://pop-around.com/file_media/file_image/file/jaxalupirobevom.pdf
    • https://alutat.com/data/file/juzazemavugedonubatenuv.pdf
    • https://www.audifonosdoshoydos.com/wp-content/plugins/formcraft/file-upload/server/content/files/16095cf124d0ff---fasasivamamurukitipivevu.pdf
    • https://rmissio.pl/wp-content/plugins/formcraft/file-upload/server/content/files/160a2fd99db907---befawamowasexevidewevax.pdf
    • https://stegopackaging.com/wp-content/plugins/super-forms/uploads/php/files/mljfc4j2bkkab4qa6nh4to399j/mebeberodepuro.pdf
    • http://prodesign31.ru/wp-content/plugins/formcraft/file-upload/server/content/files/16118c683d96ed---tebawavalawalabaro.pdf
    • http://www.goataxiservice.com/wp-content/plugins/formcraft/file-upload/server/content/files/1612a21aebff34---92436382912.pdf
    • https://www.diktu.com/wp-content/plugins/formcraft/file-upload/server/content/files/16090f4cc6cf92---5402168772.pdf
    • http://alphasigmaoverseas.com/userfiles/file/zifetozufafiwewivamop.pdf
    • https://www.golddustdental.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b6401005db9---gupiwubapilekazupasipava.pdf
    • http://velapower.com/glwh/UploadFile/file/2021072720193773499.pdf
    • http://antik-cafe-bergen.de/wp-content/plugins/formcraft/file-upload/server/content/files/160c511ece43ca---14722462663.pdf
    • https://ceilford.org/wp-content/plugins/super-forms/uploads/php/files/3cd474c8e39342f6c005947ad31c33a2/76742763950.pdf
    • http://elcwma.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/dakofil.pdf
    • http://szkolka-wiercioch.pl/files/file/41588647881.pdf
    • http://vibrosystem.ro/wp-content/plugins/formcraft/file-upload/server/content/files/160c44b240f514---menodaviwa.pdf
    • http://steinemann-ag.ru/40679304235.pdf
    • http://cameradungphat.com/uploads/files/96745428299.pdf
    • https://webmenuplus.com/images/file/gabevanoxesex.pdf
    • http://billedbutikken.dk/articlefiles/file/pilidobovipazorerobilitu.pdf
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/zMnd8XtcwSM/uplcv?utm_term=npf+recruitment+shortlist+pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000df19.bin
60d2cd489a05c52789bff0343a257d6f369d8f6e75479ab07904c701726ac3c9
pdf-font-stream PDF embedded font (sfnt) at offset 0xDF19 18300 bytes
font_01_sfnt_off00010e4c.bin
f9f4ba3bb1d21dc41cbe03733ba43a134889a092228e2a4c361821130cc71521
pdf-font-stream PDF embedded font (sfnt) at offset 0x10E4C 10800 bytes
font_02_sfnt_off000126fb.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x126FB 16792 bytes