Malicious PDF — malware analysis report

Static analysis result for SHA-256 9604474c9721e0f6…

MALICIOUS

PDF

95.0 KB Created: 2021-07-03 16:45:41 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 25ca6f7b55493cfe84b3fc09efd15222 SHA-1: 6c861ee7a342b7ecd6c74ee88c28f265f2961227 SHA-256: 9604474c9721e0f6c38b7ffffe69ed5a2ccb518de5ec48ab2b94e6903f593eec
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a phishing or trojan payload. The document functions as a link farm, containing numerous URLs pointing to compromised WordPress uploads and disposable hosting, likely intended to redirect users to malicious content. While no scripts were explicitly extracted, the PDF structure and URL patterns suggest an attempt to lure users to external sites, aligning with spearphishing tactics.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9935

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://webmodeli.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a1c398153ae---65435627071.pdf
    • https://protradingindia.net/userfiles/file/76430737031.pdf
    • http://www.thelawchamber.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607d7297bba3a---14951056656.pdf
    • https://sg-design.top/wp-content/plugins/super-forms/uploads/php/files/97826a32c6b98802dcbab50561ab4bdf/27695758002.pdf
    • http://chagatea.ru/wp-content/plugins/super-forms/uploads/php/files/b1e98756ff2b5a54c15e9ffca71276d9/2125323936.pdf
    • http://www.gcsystem.pl/wp-content/plugins/formcraft/file-upload/server/content/files/1607beb8a2a03f---45716729092.pdf
    • http://gingerbreadvillage.org/clients/e/e3/e396b250b60561adcb946853f9f62e29/File/xofutareja.pdf
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609c7fafec740---52179838361.pdf
    • http://www.apsetedavisi.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606d35b2b3a95---pakadinutererasesawekani.pdf
    • http://conwaychristian.org/wp-content/plugins/formcraft/file-upload/server/content/files/160735e32e1df1---72861013536.pdf
    • http://www.brennholz-heinlein.de/wp-content/plugins/formcraft/file-upload/server/content/files/160859a38686dc---fusufetaj.pdf
    • https://www.chauffeur-prive-nice.fr/wp-content/plugins/formcraft/file-upload/server/content/files/160c5d3dac51fc---87543435325.pdf
    • https://oneremote.ru/wp-content/plugins/super-forms/uploads/php/files/61a700faf5348b060daa4319ecb48708/ziboxowitokekevobediri.pdf
    • https://cashmeredreams.com/wp-content/plugins/super-forms/uploads/php/files/5005d3ae32e63fa92798aa3dc3be9f39/80622913747.pdf
    • http://anhuishangbiao.com/upload_fck/file/2021-5-7/20210507024433747864.pdf
    • http://edu-family72.ru/content/images/uploads/file/57170193295.pdf
    • http://richmediahouse.com/admin/uploads/file/mugevojupasatosotij.pdf
    • http://kirks-pool.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609d9d5d4f95c---94251024456.pdf
    • http://asu.com.vn/wp-content/plugins/super-forms/uploads/php/files/rbf9bjh9rtdr0dfpvkkp5kibmn/nopejotegasuvemugexiwu.pdf
    • https://www.hinogas.com/wp-content/plugins/super-forms/uploads/php/files/qfvs6r2rcjqt6ibuc9q69mj0fi/dotezewapavotunepimolop.pdf
    • https://bentzendesign.se/wp-content/plugins/formcraft/file-upload/server/content/files/160769303b2ce7---88213894773.pdf
    • http://nelly-design.ru/upload/files/45335154510.pdf
    • https://www.aironface.com/wp-content/plugins/super-forms/uploads/php/files/5941327bd25d1d494471c5705d510856/panivokolomada.pdf
    • http://www.ncstarim.com.tr/wp-content/plugins/super-forms/uploads/php/files/n985k84hvviojguetjgai71b80/31381446161.pdf
    • https://feedproxy.google.com/~r/skout/mBVl/~3/1xuhb7AK25c/uplcv?utm_term=logistic+regression+with+a+neural+network+mindset+solution
    • 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_off00010a00.bin
dfeb7c2ed10db93e3a6c8a6eec9fcfdbc62ae5e8c218ceac280b06a7dc2cfadf		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10A00 11052 bytes
font_01_sfnt_off0001235e.bin
44033b0312f49e68b4789e6c84ca1c6c15b71af41fead86a84b4dc09e4cda2c6		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1235E 18888 bytes
font_02_sfnt_off00015661.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x15661 16792 bytes

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