Malicious PDF — malware analysis report

Static analysis result for SHA-256 69a5f2cda2171423…

MALICIOUS

PDF

88.1 KB Created: 2021-08-14 13:45:42 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 4ed61b85b9c58f37d678fa908cc393b4 SHA-1: 78bd391f97ae5535786558524361ee3b148ba41f SHA-256: 69a5f2cda2171423caea657be9452a7c9005ee3c36d96bc8c7df59c0f7098240
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. It functions as a link farm, directing users to multiple external URLs, some of which are hosted on compromised WordPress sites. The embedded URLs and the overall structure suggest an attempt to manipulate search engine results or direct users to phishing or malware distribution sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://medvor.ru/uplcv?utm_term=how+to+say+godmother+in+philippines
    • http://airelimpio.mx/img/editor/file/kegamap.pdf
    • https://takiminsahada.com/wp-content/plugins/super-forms/uploads/php/files/8heef37e2b2iur1kpjm21f2c0s/gagapekijexiz.pdf
    • https://beachesbrewing.com/wp-content/plugins/super-forms/uploads/php/files/127c063b074b62c5283db7387a0c493f/tetumosopo.pdf
    • https://nuregio.de/wp-content/plugins/formcraft/file-upload/server/content/files/160a1611a7fac5---sutufefuvopinomas.pdf
    • http://www.expo-hotel.com/english/wp-content/plugins/formcraft/file-upload/server/content/files/16083cd1b09fd6---52298714053.pdf
    • http://www.sunaryem.com.tr/wp-content/plugins/super-forms/uploads/php/files/e9m65sv9hhi053f5qhg83tokg5/gunarobimugadepewuwesuv.pdf
    • http://www.sm.ac.th/ckfinder/userfiles/files/wisatesasalijik.pdf
    • https://mayurherbal.com/userfiles/file/96677746384.pdf
    • https://gauravkankariya.com/wp-content/plugins/super-forms/uploads/php/files/2phc4fqh18nhjuo6uc1o0cm6b5/70178364526.pdf
    • https://www.hamburgeriaagricola.com/wp-content/plugins/super-forms/uploads/php/files/tbbhm74hu4tsir7e062b47i2ap/moluk.pdf
    • http://klusjesindex.nl/images/uploads/mijuzelotevekiwa.pdf
    • https://www.eoluk.com/wp-content/plugins/super-forms/uploads/php/files/mds4niopjkg6se0p94cfv15ftf/zemagexurev.pdf
    • http://philipwillettelaw.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/87188284565.pdf
    • http://bizwd.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b6ea556fa37---benivomune.pdf
    • https://swotin.com/wp-content/plugins/formcraft/file-upload/server/content/files/160f43d37a5fb3---sedogut.pdf
    • http://suachuabaoduongmaynenkhi.com/img_quanganh/files/28283992301.pdf
    • https://prokoncept.hu/admin/blogfck/image/file/fajokubizulavu.pdf
    • http://sure2trips.com/bot/ckfinder/uf/files/68604492343.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_off0000f057.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF057 16792 bytes
font_01_sfnt_off0001086e.bin
7839c1ddebf9a589016553bf735aa6482d0e36b81aecfccff51c6e23bdcd01e2		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1086E 11028 bytes
font_02_sfnt_off000121b2.bin
0433b4b5b7045add6c14e4ad537da06b5f656c43bb8eafccc2f39815343b5e6a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x121B2 19216 bytes

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