Malicious PDF — malware analysis report

Static analysis result for SHA-256 cc61c9301c68a3bd…

MALICIOUS

PDF

82.3 KB Created: 2021-08-12 09:13:43 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: 78e28f6c31bcdc973968867f6a4c2ad9 SHA-1: 8f7339d967d34639cf113628602989c68d31c627 SHA-256: cc61c9301c68a3bd784fa95bcdd638dbc0d13a2dfff154421b8ac049a51cb28e
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains numerous embedded URLs, many pointing to compromised WordPress sites, suggesting a phishing or malware distribution campaign. The ML classifier and ClamAV detection strongly indicate malicious intent. The presence of link farms and UTM parameters further supports the classification as a malicious link distribution mechanism.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9984

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://inwebjor.ru/uplcv?utm_term=avengers+endgame+assemble+theme+song+download+mp3 PDF link annotation
    • https://nutstudio.it/userfiles/file/xuxomobojonodewemudifej.pdfIn PDF document text
    • https://pezenasenchantee.fr/userfiles/file/nevijibarox.pdfIn PDF document text
    • https://www.acptechnologies.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608db95ba9372---71425346032.pdfIn PDF document text
    • http://asesorialuishervas.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607f007a4c808---30571783948.pdfIn PDF document text
    • https://monacollection.ua/wp-content/plugins/super-forms/uploads/php/files/7b117bce11c793b04421c95e5082dcf6/19380098024.pdfIn PDF document text
    • https://amkboiler.com/wp-content/plugins/super-forms/uploads/php/files/j700ft5h9rq3n0iqanvg2lil5q/lekuvesexiwurekebibike.pdfIn PDF document text
    • https://flardochform.se/userfiles/file/fumutotoxofefomulotevej.pdfIn PDF document text
    • https://www.picmephotoboothhire.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160795985a6f95---70860871142.pdfIn PDF document text
    • http://www.leasebridge.com/CKUPimg/files/jaramaxez.pdfIn PDF document text
    • https://vdbergelectro.nl/wp-content/plugins/super-forms/uploads/php/files/e7af1a5f0ad96c6808b4dd51b14de420/gunuminojigakuxolusexul.pdfIn PDF document text
    • http://internationalnetworksolutions.net/files/In PDF document text
    • http://phutunggiahungoto.com/uploads/files/senazolaxawarajofupejo.pdfIn PDF document text
    • https://teenvolunteer.org/wp-content/plugins/super-forms/uploads/php/files/d1b8fae8e7a5431d3813928ce92e8518/71150090869.pdfIn PDF document text
    • http://genbreedpublisher.com/files/upfiles/file/bufinivimovegimojageni.pdfIn PDF document text
    • https://atolab.it/wp-content/plugins/super-forms/uploads/php/files/cc85923056afe38db723f385153a863d/beripur.pdfIn PDF document text
    • http://xaydunglenguyen.vn/upload/files/ae9802.pdfIn PDF document text
    • https://www.jahnigterbraak.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160a06d18dfaac---4162809438.pdfIn PDF document text
    • http://potlista.com/file/files/92256492261.pdfIn PDF document text
    • https://nailseasupportgroup.com/wp-content/plugins/super-forms/uploads/php/files/1ececa2e4a8e1072619253e43082f73e/99397897274.pdfIn PDF document text
    • https://venefoil.com/ckfinder/userfiles/files/66144525154.pdfIn PDF document text
    • https://shayangroup.net/wp-content/plugins/super-forms/uploads/php/files/a762d3b45f944d63c3aeab1ee2adcc5f/xudupoxemaborunemeji.pdfIn PDF document text
    • http://veterina-hrib.cz/user-uploads/files/913807420.pdfIn PDF document text
    • http://gulfcoolcontracting.com/uploads/userfiles/file/file/xunago.pdfIn PDF document text
    • http://budohurtsa.pl/userfiles/file/lerifi.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000c392.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC392 11192 bytes
SHA-256: e50ac54728b23a26120f9ddf3736744a8292990f3337d74b34465470eef6f5b7
font_01_sfnt_off0000dd48.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDD48 17352 bytes
SHA-256: 44af4a05ae115225853a4fbbad2f3578fb65357de17bcda61974ab28a800af17
font_02_sfnt_off00010afd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10AFD 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_03_sfnt_off0001230e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1230E 16680 bytes
SHA-256: 3c3e7d6ade04958cfbea21299068071ceea9f8437ed1469117f33a9c28b3d02d

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