Malicious PDF — malware analysis report

Static analysis result for SHA-256 6d412a65043aef8d…

MALICIOUS

PDF

85.2 KB Created: 2021-07-10 05:00:46 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: c23facc2797fccadde8e376db644ec22 SHA-1: 6f0bda4c2a8a79e3bcc6cd7afe54ccf8c2261d78 SHA-256: 6d412a65043aef8d541365e203d5a7081d3723d08c71362ce202b2950e9ca853
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a large number of embedded links, many pointing to compromised CMS upload storage and disposable hosting, indicating a link farm designed to distribute malicious content. The ML classifier and ClamAV detection strongly suggest malicious intent, likely for phishing or malware delivery. No scripts were extracted, but the structure and URL patterns are indicative of a malicious PDF.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9951

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://rhagro.com.mx/wp-content/plugins/super-forms/uploads/php/files/fca6cb9695c8905434912ad86d8a739f/jatogopuwekukitakugox.pdf
    • https://www.geosuiteonline.de/wp-content/plugins/formcraft/file-upload/server/content/files/160dd5ebabfbac---ropuwuladoboril.pdf
    • http://www.yoko-ono.be/images/userfiles/file/78578149772.pdf
    • http://asupuro.com/upload/save_image/files/76955588869.pdf
    • https://www.ferienhof-schneider.de/wp-content/plugins/formcraft/file-upload/server/content/files/160a70aa87f3fc---jeborulilewugu.pdf
    • https://yukkumpulgroup1.com/contents//files/69217907598.pdf
    • https://emprenderem.cl/files/78939358880.pdf
    • https://veglifekc.org/wp-content/plugins/super-forms/uploads/php/files//lunapil.pdf
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c94a4793b52---37213265046.pdf
    • https://stollerco.com/testingsites/advantage_aviation/assets/media/file/lagedifaweligudiporo.pdf
    • http://mevlanaasm.com/resimler/files/87841557323.pdf
    • http://thesprotia.gr/uploads/file/fifuxaso.pdf
    • http://limpiasol.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606d103c415e4---4202998406.pdf
    • http://lacasedescaraibes.fr/file/72737337804.pdf
    • https://dalyanestate.com/userfiles/file/96362404375.pdf
    • https://bisnismedsos.com/userfiles/file/batovu.pdf
    • https://aguiapromocional.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160c2f0e03c225---93415637992.pdf
    • http://agnieszkapawlik.com/userfiles/file/xazepuvigukewiriden.pdf
    • http://vegasoft.hr/wp-content/plugins/formcraft/file-upload/server/content/files/1607e96fe36b9c---foruvupabavajasukisaguxa.pdf
    • https://40parables.com/wp-content/plugins/super-forms/uploads/php/files/ed4bb1bba53792719619447076d2bdbb/94551527626.pdf
    • https://towa-aaa.jp/userfiles/file/71322780332.pdf
    • https://vildmarksjagt.dk/userfiles/file/2532423459.pdf
    • https://baohohoanglong.com/userfiles/file/jibivunuvazamajolawe.pdf
    • http://www.argentum.com/wp-content/plugins/super-forms/uploads/php/files/ujlpu37vjon6q3c0vgvh7lkk9t/sagivu.pdf
    • https://www.euroservicemilano.it/wp-content/plugins/formcraft/file-upload/server/content/files/1609b1e81d6a6e---xesiju.pdf
    • https://feedproxy.google.com/~r/Uplcv/~3/3CAf4wW3hvY/uplcv?utm_term=sim+card+not+compatible+with+iphone
    • 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_off0000ea4c.bin
9c9bb420b67262524ac6f0e4a25f03407ddb39de35aff8a5e07b3179eb955893
pdf-font-stream PDF embedded font (sfnt) at offset 0xEA4C 16956 bytes
font_01_sfnt_off0001167d.bin
9bd5ea6586993f22006708ad53d4f5009771296a644ef1581af71cadb9c131cc
pdf-font-stream PDF embedded font (sfnt) at offset 0x1167D 10912 bytes
font_02_sfnt_off00012f5d.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x12F5D 16792 bytes