Malicious PDF — malware analysis report

Static analysis result for SHA-256 ddf47b7d4aef7d4f…

MALICIOUS

PDF

92.2 KB Created: 2021-08-23 12:41:57 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-29
MD5: e2f5db9ad6f0b291bd50d05dba8875c0 SHA-1: ad53c12a7ebec95775aa7b7f4f36c56330466409 SHA-256: ddf47b7d4aef7d4fe56ab9f791180507e70b2a0b43def3f9dd2c30ee35f607a0
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.001 User Execution: Malicious Link

The PDF contains numerous links pointing to compromised websites, indicating a phishing or redirection campaign. The ML classifier and ClamAV detection strongly suggest malicious intent, likely to lead users to malicious content or phishing pages. The presence of multiple compromised CMS upload links and link farms on disposable hosting further supports this assessment.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9985

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://garglob.ru/uplcv?utm_term=kylie+red+carpet PDF link annotation
    • http://banglatalkies.com/dynamic-images/cms/file/80854173953.pdfIn PDF document text
    • http://dmhu.eu/uploads/uplib/file/58879291398.pdfIn PDF document text
    • http://opuspoint.com/ckfinder/userfiles/files/tufipetewusumu.pdfIn PDF document text
    • https://dauglita.lt/components/com_mijoshop/opencart/image/data/files/88381854116.pdfIn PDF document text
    • http://www.x454.com/wp-content/plugins/super-forms/uploads/php/files/15rhkguj36416kvkeiodntjnq6/mogunoraranesifared.pdfIn PDF document text
    • http://hillcountryawningsandsunscreens.com/wp-content/plugins/formcraft/file-upload/server/content/files/160811de5d00a9---71496096769.pdfIn PDF document text
    • http://nbc.ua/design/pic/file/67749728355.pdfIn PDF document text
    • https://www.ccps.mx/wp-content/plugins/super-forms/uploads/php/files/bc5020ea341448a465b4b5ddbbca1e3c/93847159273.pdfIn PDF document text
    • https://msr-hudsonproperties.com/wp-content/plugins/super-forms/uploads/php/files/60abba987c32674705b291ed03d4c397/22830378383.pdfIn PDF document text
    • http://weilandensemble.nl/ckfinder/userfiles/files/pexuginosujo.pdfIn PDF document text
    • http://www.annaleehuber.com/content_files/file/78570198017.pdfIn PDF document text
    • http://clinicaveterinariasangiacomo.it/userfiles/files/13583965775.pdfIn PDF document text
    • http://cleanyachts.it/writable/public/userfiles/file/51086387842.pdfIn PDF document text
    • https://nadamasristorante.it/file/nejogaxaneneto.pdfIn PDF document text
    • https://trungtamgiasuhcmmq.com/uplaod/quangtri/files/fogir.pdfIn PDF document text
    • http://www.chicagoalphas.com/wp-content/plugins/formcraft/file-upload/server/content/files/160f9a93c00cf3---jivemisovafolurujiwewu.pdfIn PDF document text
    • https://tselectromechanical.com/uploads/CKfiles/files/79495990901.pdfIn PDF document text
    • http://hollywoodterrace.org/clients/863344/File/retevupudemonirelalo.pdfIn PDF document text
    • http://bixenony.com/userfiles/files/rakabonulofazenegamafeb.pdfIn PDF document text
    • https://www.jahnigterbraak.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1608ff7fb77a2a---86372863651.pdfIn PDF document text
    • http://busankid.com/webfiles/board/file///11594434534.pdfIn PDF document text
    • http://herium.net/FileData/ckfinder/files/20210726_F83BD410289A4E58.pdfIn PDF document text
    • http://maynenkhipuma.vn/quangbasanpham/app/webroot/upload/image/files/xebitupirelelajovuderego.pdfIn PDF document text
    • https://www.enviedecrire.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bca9dd94158---48566369662.pdfIn PDF document text
    • https://clearpatth.com/userfiles/file/60687848860.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_off00010594.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10594 17568 bytes
SHA-256: e09738d9d6026ff8afec00e8d199b8bd33e40141087d68b48ed22005e8ddaa9a
font_01_sfnt_off00013347.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13347 10220 bytes
SHA-256: 039901dc7cfd9546ab2a07d45766b978fc2f521a6a38af14749c27f2eafab6e9
font_02_sfnt_off00014a53.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14A53 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1