Malicious PDF — malware analysis report

Static analysis result for SHA-256 6975d36a9245286d…

MALICIOUS

PDF

58.6 KB Created: 2021-08-29 19:04:24 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-22
MD5: 57ea4dd350af40efefd477fb0612440b SHA-1: 2fef7d6e6365deff85024e409b6bea0d53e25ce4 SHA-256: 6975d36a9245286d99cfa6f1e6aa4d486155295ca771650f5a273b7323388f37
94 Risk Score

Malware Insights

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

The PDF contains numerous links pointing to compromised WordPress sites and disposable hosting domains, indicating a link farm designed to redirect users. The ML classifier strongly flagged this PDF as malicious, and the presence of multiple external URI heuristics further supports its malicious intent. The document's structure and embedded URLs suggest it is used to distribute further malicious content or phish for credentials.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8257

Heuristics 4

  • 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 http://ghibms.com/userfiles/files/kumafag.pdf In PDF document text
    • https://broadstripe.com/wp-content/plugins/super-forms/uploads/php/files/1204b041274c5e22e76b2cfa15f79d73/4721810070.pdfIn PDF document text
    • http://skup-laptopow.com/wp-content/plugins/formcraft/file-upload/server/content/files/160768c00d3f32---jorumiluwuxafimap.pdfIn PDF document text
    • http://mrbossamktown.com/uploads/files/58239057361.pdfIn PDF document text
    • http://www.radiopopiatej.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606f3ce242d02---buzujugudeneno.pdfIn PDF document text
    • http://ambulatorioveterinariomariani.it/userfiles/files/puxogugaxasugegu.pdfIn PDF document text
    • http://acmemask.com/upfiles/editor/files/21190025462.pdfIn PDF document text
    • http://www.emporiocaritaspisa.it/wordpress/wp-content/plugins/formcraft/file-upload/server/content/files/1607deca5a658b---lisovuvajuxaw.pdfIn PDF document text
    • http://www.introspekta.si/ckfinder/ckeditor_uploaded_files/files/53456727188.pdfIn PDF document text
    • http://nek.ua/wp-content/plugins/formcraft/file-upload/server/content/files/160ca0a06ddaa9---40823643326.pdfIn PDF document text
    • https://www.hotel-palladium.gr/wp-content/plugins/super-forms/uploads/php/files/sjf48f0ppiiqgkirvotlaqhdkb/tosaputopujavazizujejabin.pdfIn PDF document text
    • https://shaplaconsulting.com/app/webroot/ckfinder/userfiles/files/2507288738.pdfIn PDF document text
    • http://worldtile.net/jangheung/userfiles/file/josufazibavovimejirobo.pdfIn PDF document text
    • http://thesecurityguardunion.ca/userfiles/files/kujiduzalomitizijagus.pdfIn PDF document text
    • https://wpsqld.com.au/wp-content/plugins/super-forms/uploads/php/files/3d9dca21f5fd581cf0b484058adaba70/46091101529.pdfIn PDF document text
    • http://tochuchoinghi.org/files/regofofikagenokawajub.pdfIn PDF document text
    • https://parklanehotel.asia/userfiles/file/ribanufumiguzifepobadak.pdfIn PDF document text
    • https://bluebeakbranding.com/wp-content/plugins/super-forms/uploads/php/files/5f0e0641fd8433f8afa8d3cce293af88/werub.pdfIn PDF document text
    • http://atya.eu/files/file/nowafejolinunavalopokoka.pdfIn PDF document text
    • http://inewbus.com/wp-content/plugins/super-forms/uploads/php/files/qd5c72sgp3bofk91jmpo9bv3s0/53655951834.pdfIn PDF document text
    • http://mesterteto.hu/userfiles/file/lusuvarivegifatejexetoj.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/6naE_Nh8_CY/uplcv?utm_term=project+3+fourth+edition+workbook+answers+pdfPDF link annotation
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000bcdc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBCDC 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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