Malicious PDF — malware analysis report

Static analysis result for SHA-256 c9c9b908f7ec3a1d…

MALICIOUS

PDF

70.5 KB Created: 2021-09-24 16:17:08 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-25
MD5: fca537265ebed3468b0708f1ad875852 SHA-1: 76f7eb57fdf2ce9b7c6196c449ea64bfe155e3bb SHA-256: c9c9b908f7ec3a1ddd2e5a3cf648c862e0a59601df31fa378e6e10cae6bfc7ef
156 Risk Score

Malware Insights

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

This PDF file was flagged as malicious by ML classifiers and ClamAV, indicating a phishing or trojan threat. It contains numerous embedded URLs, many pointing to compromised WordPress sites or disposable hosting, suggesting it functions as a link farm designed to redirect users to malicious content. The presence of external URIs and link farms indicates an attempt to lead users to potentially harmful sites, likely for credential harvesting or further malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9816

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://ipost.mn/ckfinder/userfiles/files/61373176037.pdf In PDF document text
    • https://escaletravel.com/userfiles/files/kinitibijuxugebenopababi.pdfIn PDF document text
    • https://nicemexico.net/wp-content/plugins/formcraft/file-upload/server/content/files/161404f3a175ed---famelolinuxunupalosiba.pdfIn PDF document text
    • http://shuimotongyuan.com/userfiles/file/22942887763.pdfIn PDF document text
    • https://copperscraphandlers.com/ckfinder/userfiles/files/refaperasejadovuluwavep.pdfIn PDF document text
    • http://apsons.eu/files/file/zesokuxuxiwiki.pdfIn PDF document text
    • https://pannonfinanz.eu/editor_up/48555946132.pdfIn PDF document text
    • http://atlantichomeportugal.com/wp-content/plugins/formcraft/file-upload/server/content/files/16140925be8dba---70982140419.pdfIn PDF document text
    • https://bf-pomosch.ru/wp-content/plugins/super-forms/uploads/php/files/uo6jtmgtva6jkf9kn4j1gkn2k2/nejulidurig.pdfIn PDF document text
    • http://www.airportlimofortlauderdale.net/wp-content/plugins/formcraft/file-upload/server/content/files/1614d70ec0e09e---21350639763.pdfIn PDF document text
    • http://kaupa.cz/userfiles/file/texajuda.pdfIn PDF document text
    • http://netcentricnj.com/ckfinder/userfiles/files/piduxozavotol.pdfIn PDF document text
    • http://lycee-elm.info/userfiles/file/nefuxivuku.pdfIn PDF document text
    • https://baust.edu.bd/app/webroot/ckfinder/userfiles/files/jakudabowidaxikoraf.pdfIn PDF document text
    • http://www.jamesbgriffinlaw.com/wp-content/plugins/formcraft/file-upload/server/content/files/1614cf1abefb19---46557190838.pdfIn PDF document text
    • http://ovartec.com/wp-content/plugins/formcraft/file-upload/server/content/files/16137c3c08ccba---84785170428.pdfIn PDF document text
    • http://coyada.com/up_images/up_images/21942862751.pdfIn PDF document text
    • http://aptekarynek.pl/zdjecia/fck/file/nujuj.pdfIn PDF document text
    • http://baove24h.org/upload/files/7007490150.pdfIn PDF document text
    • https://www.rogierstoel.nl/wp-content/plugins/super-forms/uploads/php/files/pob3oosfo04ouprnmsnc3rilp7/lifozuwoduvoluzojajowozeb.pdfIn PDF document text
    • https://dolphinsolutions.net/ckfinder/userfiles/files/70727688159.pdfIn PDF document text
    • http://www.mmd.ntou.edu.tw/ckfinder/userfiles/files/tojixavifimib.pdfIn PDF document text
    • https://yourtuscanyguide.com/wp-content/plugins/super-forms/uploads/php/files/uh016s6h7rem542k1mj0mh8rs2/27867288481.pdfIn PDF document text
    • http://d2dgroup.net/upload/files/39312783961.pdfIn PDF document text
    • https://goooinggroup.com/userfiles/files/20210920_162008.pdfIn PDF document text
    • http://ride-on-earth.com/images/blog/file/logisukoxejo.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/GLLx1DTH0VQ/uplcv?utm_term=a+filmywap+bollywood+movie+downloadPDF 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://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_off0000b6d5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB6D5 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000ceec.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCEEC 10680 bytes
SHA-256: 99bf36c3092e1b52c10b35c5f2235561f87ed8428616ef0268c8cd5b2cb29368
font_02_sfnt_off0000e726.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE726 16080 bytes
SHA-256: 056ad2bb5b0b9bfe7c0894c6dd40f4345db1fa375994f89827d2efd7e4597ac4

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