Malicious PDF — malware analysis report

Static analysis result for SHA-256 c8616bd6e1cc4089…

MALICIOUS

PDF

79.8 KB Created: 2021-07-16 09:03:10 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: 61e7f37ae80058b4c24d0d08ade711f3 SHA-1: f7826de78c71febe4a0b045eb5727a01adb1d66c SHA-256: c8616bd6e1cc408927f2a517bf4d92b761786a85f1a1aca7cebe398f00eaa6e2
124 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file contains a large number of external links, many of which point to compromised WordPress sites and disposable hosting. The ClamAV detection indicates it is a phishing or trojan variant. While no scripts were explicitly extracted, the nature of the link farm suggests it is designed to lure users to malicious sites, likely for phishing or to download further malware.

Machine Learning

  • Nyx PDF Classifier suspicious score 0.2676

Heuristics 5

  • 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
  • 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://globalclassic.org/wp-content/plugins/super-forms/uploads/php/files/u123rjgi2897vucvqf9l34fj4m/90142277711.pdf In PDF document text
    • https://shotclock.ca/wp-content/plugins/super-forms/uploads/php/files/ae5a93dfcd0fc055e55bb813d6ba507d/veredolowapuz.pdfIn PDF document text
    • http://www.gaviprintpack.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607e3a92289ae---30735713899.pdfIn PDF document text
    • http://builderall.info/userfiles/file/nofejoxobasun.pdfIn PDF document text
    • https://frontiersneurophotonics.org/wp-content/plugins/formcraft/file-upload/server/content/files/1/160ab61b8f1650---57418574542.pdfIn PDF document text
    • http://vankouwenenmastop.nl/UserFiles/file/xivoxa.pdfIn PDF document text
    • http://airconbank.com/upload/fckeditor/file/22034506748.pdfIn PDF document text
    • https://joyfool.art/wp-content/plugins/super-forms/uploads/php/files/e49f165a5a8e3a3dbbf70dbf567680a5/besalegitipazoda.pdfIn PDF document text
    • https://munord.com/wp-content/plugins/super-forms/uploads/php/files/0e07c9d6f89233b24e87deeb1c05b95e/gukukebobipuxunedadap.pdfIn PDF document text
    • https://travelselection.us/wp-content/plugins/formcraft/file-upload/server/content/files/160960705c3f01---96108521328.pdfIn PDF document text
    • https://evocative.ru/wp-content/plugins/formcraft/file-upload/server/content/files/160838900cc286---34030528407.pdfIn PDF document text
    • http://lnshiyue.com/userfiles/file/20210606104331_731229031.pdfIn PDF document text
    • https://tecsal.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/16083adc1c9c87---87712377590.pdfIn PDF document text
    • http://runo34.ru/attachments/file/bifukar.pdfIn PDF document text
    • http://www.urbanwaterways.info/files/japebavajoxivag.pdfIn PDF document text
    • http://www.siscard.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609447433aede---54354067798.pdfIn PDF document text
    • http://www.mondzorgvesa-voorschoten.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160b8f88d2fd9d---22092638995.pdfIn PDF document text
    • http://osc-pribor.ru/products_pictures/file/60600441298.pdfIn PDF document text
    • https://cald-lighting.com/wp-content/plugins/super-forms/uploads/php/files/24f833cf71d746262f7135c5d9093cdf/65252740337.pdfIn PDF document text
    • https://www.popcaffe.it/wp-content/plugins/super-forms/uploads/php/files/a2049d8fe8bbbb317474a99b05a1a7d3/41068318590.pdfIn PDF document text
    • https://mcq-exambd.com/app/webroot/ckfinder/userfiles/files/91037409335.pdfIn PDF document text
    • https://afd.me.uk/wp-content/plugins/super-forms/uploads/php/files/3q2c9oommsgbp7nchkq07eri5l/pekawozanomiruxas.pdfIn PDF document text
    • https://forcechicago.com/wp-content/plugins/super-forms/uploads/php/files/5a4bde7e988f08b857591a12f9b59b9f/tixoso.pdfIn PDF document text
    • http://antik-cafe-bergen.de/wp-content/plugins/formcraft/file-upload/server/content/files/1607f5e030d31f---97542625286.pdfIn PDF document text
    • https://webtechnocrats.com/upload/file/78904258908.pdfIn PDF document text
    • http://www.benyowsky.com/resources/files/61953095930.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/PmAiG5ZyT-k/uplcv?utm_term=bill+of+sale+texas+examplePDF link annotation
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f127.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF127 16248 bytes
SHA-256: 7d59a3e34fa43ee22f9397c3c02ee3ae57d2d3f9656885a55ca14f200a05d220
font_01_sfnt_off00011ae4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11AE4 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1