Malicious PDF — malware analysis report

Static analysis result for SHA-256 0cc2e20af8a4019f…

MALICIOUS

PDF

81.6 KB Created: 2021-09-15 15:25:33 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 53749327aa5fab7ab54ed04242682aff SHA-1: 7749c35691a70fe90cc30429dad6c20fc4315e84 SHA-256: 0cc2e20af8a4019fc113374e7f65b0d507f973858f6e8411112a7a35aad27616
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous external links, many hosted on compromised or disposable domains, characteristic of a link farm used for phishing or malware distribution. The presence of embedded JavaScript and a high ML classifier score further indicate malicious intent. ClamAV also detected this file as a phishing trojan.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9977

Heuristics 7

  • 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.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • 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://catamma.ru/uplcv?utm_term=digital+signal+processing+lab+viva+questions
    • https://yasacompany.com/upload/files/dimazufiwejafinutix.pdf
    • https://cuatudongbinhduong.net/uploads/files/nutanunabagivojabuz.pdf
    • http://arsvet.ru/img/upload/44499695988.pdf
    • http://mundori.com/js/ckfinder/userfiles/files/jojenalizidetonafewar.pdf
    • http://evo-models.com/uploads/userfiles/files/doninudaxevoz.pdf
    • http://topopentertainment.com/wp-content/plugins/formcraft/file-upload/server/content/files/16137534ab7c72---dafusifajirikajesi.pdf
    • https://tennis94.fr/img/pics/files/67421593398.pdf
    • https://www.mediawerf.nl/bundles/store24backoffice/ckfinder/userfiles/files/41536580284.pdf
    • https://zagi.hr/files/ravaxazuw.pdf
    • https://autoteam.in/ckfinder/userfiles/files/50196416425.pdf
    • http://mmprogetti.it/userfiles/files/gizuvuterimev.pdf
    • https://ppkh.net/userfiles/file/deraguwubezenefogasujip.pdf
    • https://network-italia.it/file/96171774078.pdf
    • http://neonatal-surgery.ru/userfiles/files/97382066560.pdf
    • http://atlantichomeportugal.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613c064c3bc39---14216807409.pdf
    • http://drinkandshrink.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/16137cad621fc1---ladutarejaborafegemupomav.pdf
    • http://www.centralperdana.com/file/xadilejonazefaxenepajag.pdf
    • http://peneleos.pl/userfiles/file/58147854792.pdf
    • http://hongphuc.vn/userfiles/file/kozuxisuvuvudulo.pdf
    • https://www.edutechusa.com/wp-content/plugins/formcraft/file-upload/server/content/files/16135371d022f5---lofepixewipozukenenolur.pdf
    • http://sententtech.com/file_media/file_image/file/wasaperew.pdf
    • https://adikketiga.com/contents/files/76217041750.pdf
    • https://et-auditing.com/userfiles/files/52939088703.pdf
    • 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_off0000d934.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0xD934 16792 bytes
font_01_sfnt_off0000f14b.bin
c37513c346463fabbb7a618f1da59fbed9296ea2b6fb0c6f96c7caa26c35dbe6		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF14B 11000 bytes
font_02_sfnt_off00010a7d.bin
a617f0a38dcf034f3f4a8bf66916ad5a3a0bac2c0dad7dfdc3256f45575ca3f2		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10A7D 17724 bytes

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