Malicious PDF — malware analysis report

Static analysis result for SHA-256 e2a14de71731686e…

MALICIOUS

PDF

86.0 KB Created: 2021-06-25 17:13:26 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 6775a1e39503f3efa4135493e9f259ad SHA-1: d8599f7b9afc5857e10c5566f7d018f22ebaaf8c SHA-256: e2a14de71731686ece1237597a781b60b7912d5e9a9bde97e5a68e7dd8f3a626
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was detected as malicious by ML classifiers and ClamAV, indicating a phishing or trojan threat. It functions as a link farm, containing numerous URLs pointing to compromised WordPress upload directories and other disposable hosting sites. The primary purpose appears to be redirecting users to potentially malicious content or phishing pages.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9947

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://wastran.ru/uplcv?utm_term=create+gif+online
    • http://ms-beauty.com/ckfinder/userfiles/files/bigume.pdf
    • https://avonsteel.com/UserFiles/file/nelisogabug.pdf
    • http://www.next-conseil.fr/wp-content/plugins/formcraft/file-upload/server/content/files/160ce50ada06a2---72602094036.pdf
    • http://ucity68.com/clients/e/ea/ea220da86df44fb0ae3b7c8e8295ccc1/File/33399531418.pdf
    • https://walkandsmile.com/userfiles/file/84358570202.pdf
    • http://raduzhniy.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609e49a3053b2---36259747010.pdf
    • http://sarahscupcakery.com/wp-content/plugins/formcraft/file-upload/server/content/files/16079db6ba38fe---23913264431.pdf
    • https://thesaddlebank.com/wp-content/plugins/super-forms/uploads/php/files/nqp5atmshpjrr8vrmcsjc39ei0/80505110353.pdf
    • http://www.suffaheducation.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607cd7b6cf34b---tadopoferixosimuterob.pdf
    • http://aarogyamedico.com/userfiles/file/46315354651.pdf
    • https://betalinktech.com/blmedia/file/23042851578.pdf
    • https://staffxrecruitment.com/wp-content/plugins/super-forms/uploads/php/files/c5732b8ad799d375c46ba9d9a19d7c77/bemoruteguwiwoz.pdf
    • https://collegemahan.ir/basefile/collegemahanir/files/8479594372.pdf
    • http://amtusa.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b189d6aa3f1---pitimexeto.pdf
    • https://theemperorsoldclothes.co.uk/wp-content/plugins/super-forms/uploads/php/files/4o1cq3ddnt1etiepth4f07ai6k/11181995956.pdf
    • http://terapie-psi.ro/wp-content/plugins/formcraft/file-upload/server/content/files/16081ae3b0e07d---83235368339.pdf
    • https://arizonalightingsales.com/wp-content/plugins/super-forms/uploads/php/files/defc2cdfc258e9e8a169954aaa6fdd50/vulowo.pdf
    • https://finances-canada.com/wp-content/plugins/super-forms/uploads/php/files/48e7c99dfb4e6b394123194f3e0a57ed/47714945774.pdf
    • http://cassotech.nl/site/data/ws/files/97224133439.pdf
    • http://www.annaleehuber.com/content_files/file/27722638829.pdf
    • http://lichnyiybrand.ru/wp-content/plugins/formcraft/file-upload/server/content/files/160c2f201d72e3---tevewibivipekiriluzug.pdf
    • https://asi-filter.pl/files/file/39225796525.pdf
    • http://sazjah.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609d870a2f491---padotawajosapaf.pdf
    • https://www.herewardcarpets.co.uk/wp-content/plugins/super-forms/uploads/php/files/0g9ov24gojjfhhhk5kc5fbrs5b/82611583428.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_off0000edf2.bin
bd41549f79868c373aecdce6eec39c3edcfe71c9541bf5735440082d519907af
pdf-font-stream PDF embedded font (sfnt) at offset 0xEDF2 10252 bytes
font_01_sfnt_off0001051f.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x1051F 16792 bytes
font_02_sfnt_off00011d31.bin
70f31d9065bfe1523533a38963b3a813a7f5e5c244519d768740adeaabc3f989
pdf-font-stream PDF embedded font (sfnt) at offset 0x11D31 17376 bytes