Malicious PDF — malware analysis report

Static analysis result for SHA-256 6e6a70e3d29dd09e…

MALICIOUS

PDF

76.1 KB Created: 2021-09-05 21:27:52 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-31
MD5: 11c4b245daf28c35a31f498ffd7b4506 SHA-1: c818c3aab07ee9cfd183317c4137b5034c253c80 SHA-256: 6e6a70e3d29dd09e9e88ddc8bc88733a69aba5b7ef507a2e6a0dbdf4d443d631
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous embedded URLs that function as a link farm, directing users to potentially malicious websites. Several URLs point to compromised WordPress upload directories, indicating a tactic to host malicious content on seemingly legitimate but compromised infrastructure. The ML classifier and ClamAV detection strongly suggest malicious intent, likely for phishing or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9948

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://infrive.ru/uplcv?utm_term=manual+handling+policy+nz PDF link annotation
    • http://abwcockeysville.com/uploads/files/95909793471.pdfIn PDF document text
    • http://www.ferm-matic.fr/upload/file/jovipafunefatu.pdfIn PDF document text
    • http://ytbozhuo.com/upload/file/250311593198.pdfIn PDF document text
    • https://primewestelectrical.com/wp-content/plugins/super-forms/uploads/php/files/a0cabd1ef158e94e58fe47f39f4adc48/xigopeviwadesovufasos.pdfIn PDF document text
    • http://alibabashipping.com/userfiles/file/vefexuxumetewoki.pdfIn PDF document text
    • http://bestbuyfromindia.com/userfiles/file/37439015030.pdfIn PDF document text
    • http://www.itbaloch.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bd688e9cebe---73817940971.pdfIn PDF document text
    • http://business-plan-capalpha.eu/mbp/upload/images/images/upload/ckfinder/juxovakujoxaxa.pdfIn PDF document text
    • http://andlupa.com/userfiles/file/zetidufolalusoxotubaroden.pdfIn PDF document text
    • http://anonelectronics.com/admin/fckeditor/editor/filemanager/connectors/php/upload_jpg/file/202108041124545687.pdfIn PDF document text
    • http://energo-winstal.pl/userfiles/file/73975522474.pdfIn PDF document text
    • http://hondatayho.vn/images/ckeditor/files/97393321030.pdfIn PDF document text
    • http://douzonebnf.com/upload/file///94666156203.pdfIn PDF document text
    • http://kanomax-nsk.ru/images/zoxutowevumeku.pdfIn PDF document text
    • http://tchid.net/userfiles/file/33031652251.pdfIn PDF document text
    • http://atut-biuro.com/uploaded/file/85321771681.pdfIn PDF document text
    • https://paardenwelzijnscheck.nl/app/webroot/files/ckeditor_files/files/faxarupubesones.pdfIn PDF document text
    • http://www.hj-bouwt.be/wp-content/plugins/formcraft/file-upload/server/content/files/1607f0ff9efcac---86707836698.pdfIn PDF document text
    • https://storage-in-motion.com/wp-content/plugins/formcraft/file-upload/server/content/files/16086ac14dd1d7---96541167492.pdfIn PDF document text
    • http://suportti.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608922fcbe9f8---resapolojizemigewopoxuzek.pdfIn PDF document text
    • https://airshow-bg.com/file/90687361500.pdfIn PDF document text
    • https://netpage.info/userfiles/file/82508996414.pdfIn PDF document text
    • https://40parables.com/wp-content/plugins/super-forms/uploads/php/files/f24e97ad1975c229a3b2048cf93d50dd/denovapozoforove.pdfIn PDF document text
    • https://tlpnw.com/wp-content/plugins/super-forms/uploads/php/files/89fd15bf9ac2462ca9704c2fc393f308/59707069576.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_off0000c667.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC667 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000de79.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDE79 17420 bytes
SHA-256: fcd181be309b311458dcdb9ac0a0ef6133d931c29fd085aceedd552fda925527
font_02_sfnt_off00010b7d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10B7D 10564 bytes
SHA-256: fe3ca72df973c76e148535a8dc5d2bd29cd2076628ebc7a825587b75026cb077

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