Malicious PDF — malware analysis report

Static analysis result for SHA-256 3d1d073b1e494dbd…

MALICIOUS

PDF

85.9 KB Created: 2021-07-27 22:56:11 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: 49ba634bd85c4a08cd6ee7d138a15b17 SHA-1: b3d14f461992838e0aca8af593595e336d583179 SHA-256: 3d1d073b1e494dbd8065d6142aa5e9fb8223d88c9a16f994dd677bd4854592e9
154 Risk Score

Malware Insights

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

The PDF document contains a link farm directing users to multiple external URLs, some of which are hosted on compromised WordPress sites. The ML classifier and ClamAV detection strongly indicate malicious intent, likely phishing or malware distribution. The presence of numerous links on disposable hosting further supports a malicious purpose.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8422

Heuristics 5

  • 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
  • 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://www.infrascale.com/wp-content/plugins/super-forms/uploads/php/files/e434dbf26d9c8439dc5fa7bd1e345e8e/vimagixagupada.pdf In PDF document text
    • http://tlxzkj.com/uploads/file/192259414835.pdfIn PDF document text
    • https://alcc.vn/wp-content/plugins/super-forms/uploads/php/files/e5s3ha1hoc4ob1lgomkmb4pgh3/fomovoberafadojixaka.pdfIn PDF document text
    • http://charivne.info/images/file/8509649553.pdfIn PDF document text
    • http://www.ibadirect.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607916c8c8646---50108723953.pdfIn PDF document text
    • https://globalazeri.az/wp-content/plugins/super-forms/uploads/php/files/alqrlps9lm19uh69jesrp7n1e2/59990477708.pdfIn PDF document text
    • https://fiambreszav.com/wp-content/plugins/super-forms/uploads/php/files/f5e94472cca729946edbdd8243beee6c/70310574608.pdfIn PDF document text
    • https://xn--78-6kce7dfhb9dwb.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/1d84a995a009f1c9fe826fa2dd2ce968/fevizonorufuropefepowaniw.pdfIn PDF document text
    • https://caravanandre.it/wp-content/plugins/super-forms/uploads/php/files/d01dadc4faa6a590a0403c9535420ffd/44412660454.pdfIn PDF document text
    • http://www.sparkprototypes.com/wp-content/plugins/formcraft/file-upload/server/content/files/160e7cacfd7513---gilabebadibajaxen.pdfIn PDF document text
    • https://lisacutler.com/wp-content/plugins/formcraft/file-upload/server/content/files/16080cd26c739d---zilamavoji.pdfIn PDF document text
    • http://www.rlktechniek.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160a6c001dc357---26807889851.pdfIn PDF document text
    • https://www.ayersworthglen.com/wp-content/plugins/formcraft/file-upload/server/content/files/160e6c3f6585fc---63444029978.pdfIn PDF document text
    • http://dmn.ca/wp-content/plugins/formcraft/file-upload/server/content/files/1608fa24bd5d55---19496765449.pdfIn PDF document text
    • http://c2mag.com/wp-content/plugins/formcraft/file-upload/server/content/files/160855e2299604---74378978432.pdfIn PDF document text
    • https://ecef-groupe.com/wp-content/plugins/super-forms/uploads/php/files/dahd9um1jdd8ftf7qnjrh0c3f0/pawinobulaxumuk.pdfIn PDF document text
    • http://wacommerce.net/home/integrity/public_html/ckfinder/userfiles/files/59537441624.pdfIn PDF document text
    • http://artecgroupservices.com/imagenes/file/fefisadavuti.pdfIn PDF document text
    • http://cn-daomeng.com/upload/userfiles/files/b794e55df16596344784caaac9625256.pdfIn PDF document text
    • http://dollreunion2020.com/clients/4/43/4392dc7a9e9236654a628da0af121bbb/File/resumudapibi.pdfIn PDF document text
    • https://iva-vietnam.com/userfiles/file/jagokimazeviraru.pdfIn PDF document text
    • https://www.espaciocultivarte.com/ckfinder/userfiles/files/gasokuzatoju.pdfIn PDF document text
    • http://nappsa.org/userfiles/file/dokubujovixuditapilofi.pdfIn PDF document text
    • http://uniquehotelsolutions.com/files/others/vofafubejo.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/6naE_Nh8_CY/uplcv?utm_term=what+does+zodiac+compatibility+meanPDF link annotation
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00010f0c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10F0C 16648 bytes
SHA-256: 7ec272e8d342edda40f157e0e398346699de46c1c37c5f31a8ec000affc2de77
font_01_sfnt_off00013a4e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13A4E 10984 bytes
SHA-256: b2aea70c27d98acaa8f45dbc86536ec94cfcab0bbe7b8a01c032e421bc743cd9