Malicious PDF — malware analysis report

Static analysis result for SHA-256 72946272d10a4ddd…

MALICIOUS

PDF

68.6 KB Created: 2021-09-24 18:37:16 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-25
MD5: f4d883732a66ecfe30df05d0eef67e6d SHA-1: 78c2a5ecb069945275e3df19d287b6cf1b091294 SHA-256: 72946272d10a4ddd14fb48852c8136ebc56302e5558bfc46f593a4ecca68764d
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains numerous external links, many pointing to compromised WordPress sites or disposable hosting, indicating a link farm designed to distribute malicious content or phish users. The ML classifier and ClamAV detection strongly suggest malicious intent, likely related to phishing or malware delivery via these links. Although no scripts were explicitly extracted, the nature of the links and the PDF structure suggest it is intended to lure users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9992

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://wastran.ru/uplcv?utm_term=homescapes+mod+apk+android+1 PDF link annotation
    • https://piataafacerilor.ro/app/webroot/files/userfiles/files/fuvidiloneruwutubedol.pdfIn PDF document text
    • http://serviphony.com/tinymce/jscripts/tiny_mce/plugins/phpimage/phpimage/upload/images/file/sularotojefogebowepef.pdfIn PDF document text
    • https://primeodontorj.com/wp-content/plugins/super-forms/uploads/php/files/87bec2018ca977a413bd173419474af6/79855592651.pdfIn PDF document text
    • http://bongoes62.dk/userfiles/file/kodobexujakoketemu.pdfIn PDF document text
    • http://peaceinsrilanka.lk/userfiles/file/47689839125.pdfIn PDF document text
    • http://receptlap.hu/files/dibifapubinalajeno.pdfIn PDF document text
    • http://jjw-led.com/userfiles/file/94328085757.pdfIn PDF document text
    • https://www.accidentinjurylascruces.com/wp-content/plugins/super-forms/uploads/php/files/6h585cac6hnv39h18mnkojp8bq/3109714672.pdfIn PDF document text
    • http://tonyprins.nl/images/uploads/file/kibejupotegin.pdfIn PDF document text
    • https://coolingrealestate.com/your-home-cleaner/FCKuploads/file/jejaginudedenijazif.pdfIn PDF document text
    • http://bluelakehomestay.com/uploads/image/files/nodukobi.pdfIn PDF document text
    • https://intersat.lv/files/file/nobesabavarigubut.pdfIn PDF document text
    • http://videocycling.info/files/file/buboxenapobogajonuzuzu.pdfIn PDF document text
    • https://www.ijmsir.com/ckfinder/userfiles/files/zojoxe.pdfIn PDF document text
    • http://kenshopvn.com/uploads/files/duvagofeluxolejizobidiwav.pdfIn PDF document text
    • https://dichocungtoi.com/userfiles/file/wejazupe.pdfIn PDF document text
    • https://capecoralliving.com/media/file/dakuxefarakuveg.pdfIn PDF document text
    • https://deewo.de/wp-content/plugins/formcraft/file-upload/server/content/files/1614d4140065be---robolomipuvijuxu.pdfIn PDF document text
    • http://xhiehchin.com/Xhieh_News/_file/73029457561.pdfIn PDF document text
    • http://pribatu.lamilagrosaimport.com/images/files/xejepulefiwaxinov.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_off0000ab2c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xAB2C 16476 bytes
SHA-256: 9d9318523747d6a10cc5b4bd62070ca8f895fb5f4d02032c3efe8881ef3afc74
font_01_sfnt_off0000d4cb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD4CB 10668 bytes
SHA-256: 6fd653e125b0742ed552e00193b0f59ac5db7eb81e1dbc080b09b637ebde82b5
font_02_sfnt_off0000ed36.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xED36 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1