Malicious PDF — malware analysis report

Static analysis result for SHA-256 aa4200929057acde…

MALICIOUS

PDF

98.1 KB Created: 2021-08-11 13:24:13 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: f1c69d7264535b9bb7f6b51066662163 SHA-1: 5f2055e1c23d6d889ebbb60342dbc905857780c3 SHA-256: aa4200929057acde2e5ab8338438fe80ad4f7ac652478f2f346afb1f2a97030b
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous links pointing to compromised websites and disposable hosting, indicating a link farm designed to redirect users. The ML classifier and ClamAV detection strongly suggest malicious intent, likely for phishing or distributing further malware. Although no scripts were explicitly extracted, the PDF structure and URL heuristics point towards a malicious document, potentially leveraging embedded JavaScript for redirection.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9865

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://mmoxx.mn/userfiles/files/25659497846.pdf In PDF document text
    • https://www.tessilgiada.it/wp-content/plugins/formcraft/file-upload/server/content/files/16073cc9318741---buxud.pdfIn PDF document text
    • https://momsgardenfoods.com/ckfinder/userfiles/files/56018483761.pdfIn PDF document text
    • http://chandigarhdatarecovery.com/files/file/xawepumanubanurekidomo.pdfIn PDF document text
    • http://geonatlife.es//ckfinder/userfiles/files/82852446551.pdfIn PDF document text
    • http://konsultacjenaukowe.eu/Upload/file/nadida.pdfIn PDF document text
    • http://teresachild.com/upload/files/13695121113.pdfIn PDF document text
    • http://mrs724.ir/basefile/drtiketcom/files/fifamukapovavib.pdfIn PDF document text
    • http://artetendasud.it/userfiles/files/56605806141.pdfIn PDF document text
    • https://gangwontaxi.com/FileData/ckfinder/files/20210718_47D6896595B70D4C.pdfIn PDF document text
    • http://agataklimowska.pl/userfiles/file/jevobigi.pdfIn PDF document text
    • https://progin.ch/ckfinder/userfiles/files/gadutikizejelopunasizod.pdfIn PDF document text
    • https://moma-restaurant.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ab40cc125b9---46225020975.pdfIn PDF document text
    • https://portsidestrategies.com/wp-content/plugins/super-forms/uploads/php/files/74e89f117045ad0242684c016e6ddeed/50099918359.pdfIn PDF document text
    • https://eniedu.com/data/file/20210807005613.pdfIn PDF document text
    • https://djhelaly.com/wp-content/plugins/super-forms/uploads/php/files/4491a6c8acabb33e91db8fe47e0184fc/69874809751.pdfIn PDF document text
    • https://realestateconnect.pro/wp-content/plugins/super-forms/uploads/php/files/h1sr4h1q0kmin80iqhic6pphv2/95245027922.pdfIn PDF document text
    • https://macleanpinesdrivingschool.com.au/wp-content/plugins/super-forms/uploads/php/files/4a01b648d356a467ad941b12bcb729b1/taxinizapilemivakejosul.pdfIn PDF document text
    • http://pomocnaukowa.net/Upload/file/dokefogetofogopav.pdfIn PDF document text
    • http://sutphinsgermanshepherds.com/clients/21958/File/24430087943.pdfIn PDF document text
    • https://hrmconsulting.biz/upload/files/23359998789.pdfIn PDF document text
    • http://www.sunarsurdurulebilir.com/wp-content/plugins/super-forms/uploads/php/files/b445oq6q5guuar4d73lsrjn8e3/90352753737.pdfIn PDF document text
    • https://ksuskalology.com/images/file/47158421918.pdfIn PDF document text
    • http://www.akutrans.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608e873721325---94991085668.pdfIn PDF document text
    • http://a-daily.jp/app/webroot/contents_img/files/tuxagalejatelemezef.pdfIn PDF document text
    • https://xn--64-mlcufjjaii0l.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/07c16f232722bfd1a794dead738b6ed7/70348015736.pdfIn PDF document text
    • http://profisystem.ro/wp-content/plugins/formcraft/file-upload/server/content/files/1607585109b211---27877297396.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/GLLx1DTH0VQ/uplcv?utm_term=kubota+b21+service+manualPDF link annotation
    • 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_off00011b7e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11B7E 17388 bytes
SHA-256: 1e9112a9d3d5738fca0f8becf52ea1b1401c264fb9236c47ed78cbdd230d37cf
font_01_sfnt_off00014965.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14965 10860 bytes
SHA-256: 1cd3fef253750870e640ee0fa92a80c83ba9ff783a6c219856504e543cdb9495
font_02_sfnt_off0001629f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1629F 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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