Malicious PDF — malware analysis report

Static analysis result for SHA-256 61bc3a0bdd5355e7…

MALICIOUS

PDF

76.2 KB Created: 2021-09-05 02:03:38 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: 7f6e5b541887998409b2162f7e8ecd19 SHA-1: 3fdfaef61014ca08b0a70581746efcf2bbf2a4bf SHA-256: 61bc3a0bdd5355e7af4cee50ca574e30e45b8ef48858f683e1a9ab0352386bf5
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged by ClamAV as Pdf.Phishing.Trojan and by an ML classifier as malicious. It contains numerous links to external websites, many of which appear to be hosted on compromised CMS platforms or disposable domains, suggesting a link farm designed to redirect users to malicious content. The presence of embedded URLs and the nature of the heuristics indicate a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9827

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://pixomot.ru/uplcv?utm_term=communication+systems+simon+haykin+5th+edition+solution+manual PDF link annotation
    • http://marklaliberte.com/fckupload/file/wigapezufiruwifakatobe.pdfIn PDF document text
    • https://globalclassic.org/wp-content/plugins/super-forms/uploads/php/files/158kf01o95beh1m7866j17c31b/37880278506.pdfIn PDF document text
    • http://kystop.com/wp-content/plugins/super-forms/uploads/php/files/pu3sv4c02bmhm06n0ph33lh1j1/natozewujilifit.pdfIn PDF document text
    • http://www.appsolutely.sg/wp-content/plugins/formcraft/file-upload/server/content/files/1609a90bfdc1fb---busanojitapumujafokifumit.pdfIn PDF document text
    • http://www.sevenchurchestour.net/seven/wp-content/plugins/formcraft/file-upload/server/content/files/1609caa09ded8c---ruduguku.pdfIn PDF document text
    • http://ricoconsultingattorney.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/sibesatogefotefanoz.pdfIn PDF document text
    • http://www.misshandicap.ch/wp-content/plugins/formcraft/file-upload/server/content/files/1607b1b28dcea0---sugobamunexivemoruta.pdfIn PDF document text
    • http://luingpyrex.cz/foto/Image/file/54417063700.pdfIn PDF document text
    • https://arizonalightingsales.com/wp-content/plugins/super-forms/uploads/php/files/83fbfaa3266a9f84346752b5f2806453/fogokanigatinejor.pdfIn PDF document text
    • https://psychologgia.pl/Upload/file/25902159151.pdfIn PDF document text
    • https://rescue.bg/wp-content/plugins/formcraft/file-upload/server/content/files/160f930f4f38d9---jekigogi.pdfIn PDF document text
    • http://krikrik.ru/uploads/ckfinder/files/dusipelekexi.pdfIn PDF document text
    • http://www.village-gaulois.org/gestion/ckfinder/userfiles/files/23525738143.pdfIn PDF document text
    • http://www.pattyn360.com/upload/forum/files/55501443983.pdfIn PDF document text
    • http://xperion.hu/wp-content/plugins/super-forms/uploads/php/files/adf6c895f7a9c5da5d47a50279cefb49/susotebabenilile.pdfIn PDF document text
    • https://unitedcardsolutions.com/wp-content/plugins/formcraft/file-upload/server/content/files/160931e1186d99---64919389054.pdfIn PDF document text
    • https://cwlighting.com/wp-content/plugins/super-forms/uploads/php/files/164bbfcb8f07265b6beade8a9297700d/jiridagagog.pdfIn PDF document text
    • https://a2designbg.com/userfiles/file/34035333197.pdfIn PDF document text
    • https://bednidhitraders.com/userfiles/file/lomejawuvegav.pdfIn PDF document text
    • http://short-story.ru/upload/file/48197074835.pdfIn PDF document text
    • http://portalpr-b2b.es/img/user//file/_0203587001629936705.pdfIn PDF document text
    • http://marinapogon.pl/upload/file/lupinepomova.pdfIn PDF document text
    • http://pnmanagementsolutions.in/uploads/42012233414.pdfIn PDF document text
    • http://esistore.de/userfiles/file/5992678499.pdfIn PDF document text
    • http://allegroescrow.com/wp-content/plugins/formcraft/file-upload/server/content/files/160792d41c3c05---77297168223.pdfIn PDF document text
    • http://castrolmintabolt.hu/images/upload/file/fesitenukepemijenigital.pdfIn PDF document text
    • http://beijingxinzhi.com/userfiles/file/20210526130739_870885124.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_off0000c309.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC309 17748 bytes
SHA-256: 64fa219912a89dd6946a3140072a63c7b30a628c07ec4be520e2d45e82cc9648
font_01_sfnt_off0000f0e7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF0E7 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off000108fe.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x108FE 11004 bytes
SHA-256: 3fbb0db82624b578e29c03f38483ecfbd46a7e7d94d590ade1d7d51f1c6d8d96

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