Malicious PDF — malware analysis report

Static analysis result for SHA-256 6a9fea227dc6d430…

MALICIOUS

PDF

82.8 KB Created: 2021-07-21 12:13:40 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 72e268c8e28411aeaafecf7b8116c670 SHA-1: 0b917562441727268203aa9123ce9b949ec83f22 SHA-256: 6a9fea227dc6d4309090558661b9515d961ab503161963d173e47c2d2244937f
156 Risk Score

Malware Insights

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

This PDF file was flagged by ClamAV as Pdf.Phishing.Trojan and by an ML classifier as malicious. It contains numerous links pointing to compromised WordPress sites, indicating a link farm designed to redirect users to potentially malicious content. The presence of these links suggests an attempt to distribute malware or conduct phishing attacks.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9964

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://www.golddustdental.com/wp-content/plugins/formcraft/file-upload/server/content/files/160e5606f573ac---75454960639.pdf
    • https://pfgmm.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/1608c506a9a549---wesexomukarobubew.pdf
    • https://aduanaldelvalle.mx/userfiles/file/80915811878.pdf
    • https://moniimpex.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a6c637c5cbc---74098099413.pdf
    • https://ewms.vn/wp-content/plugins/super-forms/uploads/php/files/rsioo0omninjlt6a6lbvov01pg/44291687496.pdf
    • http://yatros.ro/wp-content/plugins/formcraft/file-upload/server/content/files/160f0c58816174---pipepazawobet.pdf
    • http://iwish-cosmetics.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a497e58a3dc---soguzogezemon.pdf
    • https://motacademy.it/file/xopikugolizelonetofubosot.pdf
    • http://visualpaint.com/wp-content/plugins/formcraft/file-upload/server/content/files/16086619c597cd---78451782323.pdf
    • https://www.cocochan.com.pk/wp-content/plugins/super-forms/uploads/php/files/b830fec80a821a4fb20f7c7628ef8651/pofuwib.pdf
    • https://swotin.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608b0fd000bcd---nofubenutadazulutirorut.pdf
    • https://useoneconvo.com/wp-content/plugins/super-forms/uploads/php/files/123d515f2c7f25633694a9ab365d3e67/vivizisolekesizaleji.pdf
    • http://aelma.com/sites/default/userfiles/file/68461149606.pdf
    • http://dryoucosmeceutical.com/userfiles/files/lenuvitugetitetoto.pdf
    • http://bogieclassof67.com/clients/71235/File/nubexinowagutufini.pdf
    • http://sumbulefendiegitimvakfi.com/resimler/files/31678101605.pdf
    • http://conservationenergy.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607c9267b5c1f---94947359866.pdf
    • https://betonwerkendejonge.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160ee3c2fd7998---95225156076.pdf
    • http://saopauloairporttransfers.com/ckfinder/userfiles/files/87171912563.pdf
    • https://alixdemassy.fr/userfiles/file/pitalezixabe.pdf
    • https://www.davidwoodpersonnel.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609ab68b87705---45018246335.pdf
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/FevRqgeaUVY/uplcv?utm_term=womb+in+bloom
    • 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_off0000e552.bin
5ecabcc458da2982c5e9703e0a44170971fbd16ee53ddce248eae581207a8d52
pdf-font-stream PDF embedded font (sfnt) at offset 0xE552 9740 bytes
font_01_sfnt_off0000fa6d.bin
ab2db6a59915705561f1f7b5c0c928e7e97780b491b200f57d3ec2992ac1a5c2
pdf-font-stream PDF embedded font (sfnt) at offset 0xFA6D 16764 bytes
font_02_sfnt_off00012619.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x12619 16792 bytes