Malicious PDF — malware analysis report

Static analysis result for SHA-256 7d7053d3e0b3f363…

MALICIOUS

PDF

81.2 KB Created: 2021-09-07 05:26:19 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14
MD5: 901a2db18d6e7cf88c52828b69d8bf59 SHA-1: fccc5df1a4f5759077cfccfac9d30f262cc7e50a SHA-256: 7d7053d3e0b3f363bc57f9c6733ab92bb99a28959837e4af3bc3b6a1f81043a3
96 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF file contains numerous embedded URLs that point to compromised websites, indicating a link farm designed to redirect users to potentially malicious content. The ML classifier strongly flagged this PDF as malicious, and heuristics identified it as a link farm on disposable hosting and pointing to compromised CMS uploads. No scripts were extracted, but the primary attack pattern is the distribution of malicious links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9960

Heuristics 5

  • 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://philabc.ru/uplcv?utm_term=circle+rate+gurgaon+2018-19+pdf PDF link annotation
    • http://uts.edu.co/portal/app/ckfinder/userfiles/files/kisowigowivuwuk.pdfIn PDF document text
    • https://californiaoptionsrealestate.com/wp-content/plugins/super-forms/uploads/php/files/e63c4c18085576fc0ccb4c026d5c7cb4/solisovoz.pdfIn PDF document text
    • https://volnynaklad.cz/data/file/vetubunepapadetetujuj.pdfIn PDF document text
    • http://goteneplast.se/files/images/file/83029784.pdfIn PDF document text
    • http://www.qookspot.kitchen/wp-content/plugins/formcraft/file-upload/server/content/files/16105ff990e33c---viwudivuguzajekugodo.pdfIn PDF document text
    • https://vinisfarm.com/wp-content/plugins/super-forms/uploads/php/files/caf416baba6435a6c914adaa2fd68c7c/37421647086.pdfIn PDF document text
    • https://sharzh-ufa.ru/wp-content/plugins/super-forms/uploads/php/files/2e3283d63027f9204599072b76f80087/61696457971.pdfIn PDF document text
    • https://htapigroup3.com/contents//files/jatubadiw.pdfIn PDF document text
    • https://alshamiltrading.com/alshamilfiles/file/tupetugodesaferumoperorub.pdfIn PDF document text
    • http://interiorconsignments.com/media/file/wogudamasigafeletuviju.pdfIn PDF document text
    • http://viaterrestre.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160994a6d7b861---25450150799.pdfIn PDF document text
    • https://www.opdrrustukalac.com/wp-content/plugins/formcraft/file-upload/server/content/files/16085f97330959---60399871967.pdfIn PDF document text
    • https://dmvassociates.com/wp-content/plugins/super-forms/uploads/php/files/4f1448d9b31fe410484a11680b97e510/rikutopoju.pdfIn PDF document text
    • https://dpmceramiche.it/file/nozadajifexije.pdfIn PDF document text
    • https://www.harnoordesigns.com/wp-content/plugins/super-forms/uploads/php/files/9d8d150fabb9f965a1c1aa1b4c78c8f1/bejuromoribonuwojipito.pdfIn PDF document text
    • http://caratow.nl/userfiles/file/fekalexutojududira.pdfIn PDF document text
    • http://burattinojatek.hu/userfiles/file/safokape.pdfIn PDF document text
    • http://www.northern-japan.com/image/upload/File/buzogugeriberetawujuw.pdfIn PDF document text
    • https://binarbaid.com/public_html/userfiles/file/kilidosinepu.pdfIn PDF document text
    • https://dammesliepas.lv/ckfinder/userfiles/files/renowezewetaj.pdfIn PDF document text
    • https://interesttour.com/wp-content/plugins/super-forms/uploads/php/files/34e708868a4522c3db23be6493d267c6/89032681474.pdfIn PDF document text
    • https://literie-depot.fr/UserFiles/file/3608268656.pdfIn PDF document text
    • https://spazmedia.com/wp-content/plugins/formcraft/file-upload/server/content/files/160e2cfa2aaa29---rokumitegamas.pdfIn PDF document text
    • 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_off0000d76f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD76F 17196 bytes
SHA-256: b254dbfd6b9fa1c39cf272fc197d9901f129d8e68597cb56315ba7d16d8dfee6
font_01_sfnt_off00010412.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10412 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00011c29.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11C29 11460 bytes
SHA-256: f9740a4f581291715a3e7ddb1a081259954b1ec91a8ca973dc130d14d565ad8d

Open this report in the interactive analyzer, or submit your own file for analysis.