Malicious PDF — malware analysis report

Static analysis result for SHA-256 ca212a9946aee4aa…

MALICIOUS

PDF

86.9 KB Created: 2021-08-04 12:27:55 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23
MD5: e145f10f183dbceea8209f5426984116 SHA-1: 3229bc0635550d2a04fd070ad507b2f29ed0c02d SHA-256: ca212a9946aee4aa0227fb4898e534bd564b1e3d954f96565cbbc744a0755d84
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file contains numerous links, many of which point to websites hosted on compromised CMS platforms or disposable hosting. This behavior is indicative of a link farm designed to distribute malicious content or phish users. The ML classifier and ClamAV detection strongly support its malicious nature.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9990

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 http://www.ez4parcel.net/upfile/files/2021/07/14/46003189412.pdf In PDF document text
    • http://brilliantsolarpaneling.com/userfiles/file/87168180239.pdfIn PDF document text
    • http://balone.net/_upload/file///54079146.pdfIn PDF document text
    • https://blindnow.com/userfiles/file/8971529169.pdfIn PDF document text
    • http://rjbmachinery.com/d/files/takigekazugapabuborurera.pdfIn PDF document text
    • https://avayemehr-carpet.ir/data/file/zupezoxuribawixomuki.pdfIn PDF document text
    • https://flcevent.fcu.edu.tw/plugin/ce1/ckfinder/userfiles/files/20210716073823.pdfIn PDF document text
    • https://rhythmcprandfirstaid.com/wp-content/plugins/super-forms/uploads/php/files/3d0018c16d86e650f70c77f6712b3f84/xagusevatopodafije.pdfIn PDF document text
    • http://belhavenhighschoolalumni.com/clients/13962/File/dawixesodatekasov.pdfIn PDF document text
    • https://www.cedicar.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c1206220ece---gariwomaloguguxojijoxarag.pdfIn PDF document text
    • http://paulbwatkinslaw.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/mirevedu.pdfIn PDF document text
    • http://eclickapps.in/userfiles/files/960873069.pdfIn PDF document text
    • https://nadamasristorante.it/file/60298883173.pdfIn PDF document text
    • https://netwindowvn.com/uploads/userfiles/file/vonilorakowase.pdfIn PDF document text
    • https://dmvassociates.com/wp-content/plugins/super-forms/uploads/php/files/bf9cc4b71994bb358902bcee13fb9699/tuxilebememasavo.pdfIn PDF document text
    • https://autotrilogy.com/wp-content/plugins/super-forms/uploads/php/files/1b5f527b14a4047174930e25ef05d1db/komegumijunufekofufuxik.pdfIn PDF document text
    • https://www.diktu.com/wp-content/plugins/formcraft/file-upload/server/content/files/160fd5d6932e05---17550815879.pdfIn PDF document text
    • http://akicgiyim.com/userfiles/file/javeruporugasagekak.pdfIn PDF document text
    • https://nationalcardsolutions.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a638cf058ae---sojuniror.pdfIn PDF document text
    • https://bentzendesign.se/wp-content/plugins/formcraft/file-upload/server/content/files/16093a52c70409---sulopofewijomurelomux.pdfIn PDF document text
    • http://allamericannursing.com/userfiles/file/42528315986.pdfIn PDF document text
    • https://hfdjet.com/wp-content/plugins/super-forms/uploads/php/files/c4537fc2a6ff746a2a73531b5aeefa43/68420845395.pdfIn PDF document text
    • http://promocode.lu/userfiles/files/sapexikubutasatepawadap.pdfIn PDF document text
    • https://vegastel.eu/components/com_mijoshop/opencart/image/data/files/kowalajubasexegozevoxege.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/BvfzZFkJO3s/uplcv?utm_term=how+to+hook+up+my+ilive+sound+barPDF 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://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/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_off0000ef95.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEF95 11248 bytes
SHA-256: 8abec0ede4b6bb89173ab2309a1ed0da81d2e88932506c1be7704bade9917654
font_01_sfnt_off00010998.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10998 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off000121aa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x121AA 16816 bytes
SHA-256: 2a6b73fc3101fcdb951c8106bd8d5025e58b7e7594740653615d2658e5926915