Malicious PDF — malware analysis report

Static analysis result for SHA-256 0352a769daf8c653…

MALICIOUS

PDF

77.6 KB Created: 2021-07-02 19:22:02 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-25
MD5: 030d885d6fb277cca13f266afb9d372c SHA-1: 4fa26d44a5af7d8928d890b428377d41c29e980d SHA-256: 0352a769daf8c6531b1cf6580209375601065e7b5893aad4471ac97c76a284a0
154 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ClamAV and ML classifiers, indicating a phishing or trojan threat. It functions as a link farm, with numerous embedded URLs pointing to compromised CMS upload storage and disposable hosting. These links likely lead to further malicious content or exploits, suggesting an attempt to lure users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.5364

Heuristics 5

  • 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
  • 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://djhelaly.com/wp-content/plugins/super-forms/uploads/php/files/7c8168bb9d2cdd21035818eb6706e267/dunebapibuwajafiraret.pdf In PDF document text
    • http://salonlomi.pl/wp-content/plugins/formcraft/file-upload/server/content/files/160a849d1654ef---zilexexef.pdfIn PDF document text
    • http://holidayinntorino.com/userfiles/files/68770156604.pdfIn PDF document text
    • http://dynamic1984.com/user_file/file/rumumopujenimalulagofe.pdfIn PDF document text
    • https://martabaktelor.com/contents//files/71564858894.pdfIn PDF document text
    • https://3dreamstudios.com/wp-content/plugins/super-forms/uploads/php/files/10b03203e682788c18d2074c1af91ed3/35146301083.pdfIn PDF document text
    • http://xn--80ackbssfuieecff0e8c.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/nmclto1ck4ve0u7eeukbcekal4/82586014569.pdfIn PDF document text
    • https://www.birdandwildlifeteam.com/wp-content/plugins/formcraft/file-upload/server/content/files/16074257d1dc98---82349302719.pdfIn PDF document text
    • https://t2sc.me/userfiles/nujenegewipar.pdfIn PDF document text
    • http://mobilesamara.com/img/files/file/65685356531.pdfIn PDF document text
    • https://weblative.com/wp-content/plugins/super-forms/uploads/php/files/5esr4kddi6gk0bru61bc1ghndp/86961432107.pdfIn PDF document text
    • https://addsfly.com/userfiles/file/deweb.pdfIn PDF document text
    • https://elpmarketing.ca/wp-content/plugins/super-forms/uploads/php/files/f082bcc9945c464da28ffe998583c33c/86644095087.pdfIn PDF document text
    • http://sieckultury.pl/wp-content/plugins/super-forms/uploads/php/files/89ef6c3faf80d87c5e00672bb11dcb22/linibujo.pdfIn PDF document text
    • https://socialchangefactory.org/wp-content/plugins/super-forms/uploads/php/files/b843188e4bf45120765d8dad84031054/49844559271.pdfIn PDF document text
    • https://kakvkusno26.ru/wp-content/plugins/super-forms/uploads/php/files/e81862bb89b02d490f2fc43bf5356931/38621974801.pdfIn PDF document text
    • http://becro-plast.hr/wp-content/plugins/formcraft/file-upload/server/content/files/160dee9d6cfebc---fogixolo.pdfIn PDF document text
    • http://www.bewegeninarnhem.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160d5c94f451e6---dowuru.pdfIn PDF document text
    • http://giasuthanhdat.vn/Images_upload/files/44177134289.pdfIn PDF document text
    • http://nd-58.ru/wp-content/plugins/super-forms/uploads/php/files/a01e5f03fb136a7ee9d329eb04ee344c/45946121675.pdfIn PDF document text
    • https://kovosluzba-praha.cz/res/file/regixixof.pdfIn PDF document text
    • http://nowyhotelik.pl/userfiles/file/53062959725.pdfIn PDF document text
    • http://nsk-nalogov.net/upload/files/64138160932.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/PmAiG5ZyT-k/uplcv?utm_term=coulomb%27s+law+k+constant+valuePDF link annotation
    • 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_off0000d721.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD721 10748 bytes
SHA-256: a09b14a539e2a1a7b9ac8f4989f7a14541596efe1885ef983e1204626f76e1a3
font_01_sfnt_off0000f013.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF013 19228 bytes
SHA-256: 01a361709da1f8d7bc071b9c92e6c666978ab545dae72955e44efe8c8c1d9ab9
font_02_sfnt_off0001235a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1235A 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1