Malicious PDF — malware analysis report

Static analysis result for SHA-256 fa8d94778655ea2a…

MALICIOUS

PDF

85.9 KB Created: 2021-07-05 15:32:16 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-04
MD5: f63be5f77d5d0c819d812ca17343a3a9 SHA-1: d7e743dc18cef1e74205e8632c304d475361acb4 SHA-256: fa8d94778655ea2a2a439d8d2ea74ff213d2f6157b5b5aaac94b9d0c7b6e6ec5
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm, many hosted on compromised CMS upload directories and contains embedded JavaScript. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9848

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=co+curricular+activities+for+students PDF link annotation
    • https://anctools.com/ckfinder/userfiles/files/5676862877.pdfIn PDF document text
    • http://iwish-cosmetics.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607d3543ba121---37296152517.pdfIn PDF document text
    • http://imaginove.eu/data/Files/jeronapinajewopuwuxiwi.pdfIn PDF document text
    • http://www.darvidproperty.com/news/file/25174095501.pdfIn PDF document text
    • https://annjulieskarpmo.com/userfiles/file/95863971578.pdfIn PDF document text
    • https://cleaner.pl/userfiles/file/vifovidorugemijepo.pdfIn PDF document text
    • https://www.cocochan.com.pk/wp-content/plugins/super-forms/uploads/php/files/74b1f23ac4b5c8627504bcaff4507a8a/kimozaxanazafaxexugikalod.pdfIn PDF document text
    • https://lepjunk12.hu/uploads/files/kejirusajejanewonizaxojo.pdfIn PDF document text
    • http://botanicgardenscafe.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160b0a886c4a35---sezixusedadisusoli.pdfIn PDF document text
    • https://emilline.dk/ckfinder/userfiles/files/6981215369.pdfIn PDF document text
    • http://clinicaveterinariagussago.com/userfiles/files/30052448436.pdfIn PDF document text
    • http://www.asejnrtigers.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160a3f2871124e---gifikoz.pdfIn PDF document text
    • http://garagehayashi.com/js/upload/files/werolufakenisuput.pdfIn PDF document text
    • https://www.andeanskyline.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609dcdbde0ea7---85977432057.pdfIn PDF document text
    • http://www.kevinbrooks.ca/wp-content/plugins/formcraft/file-upload/server/content/files/16077848847958---57905215621.pdfIn PDF document text
    • https://leunamgroup.com/wp-content/plugins/super-forms/uploads/php/files/34c1ba114b5ac8f4cd52e1bb53f3a9d6/64215197345.pdfIn PDF document text
    • http://www.sunarmisir.com.tr/wp-content/plugins/super-forms/uploads/php/files/teajdtf2ico0t3pqcjm750og43/22033501696.pdfIn PDF document text
    • http://teplospectr.ru/images/files/77700073893.pdfIn PDF document text
    • http://gymostrov.org/gymostrov/userfiles/file/35239394404.pdfIn PDF document text
    • https://neoville.ru/wp-content/plugins/super-forms/uploads/php/files/93cf71ef207132993a60ddd54f140fc0/devite.pdfIn PDF document text
    • http://yjsyrj.com/userfiles/file/jelisejoregokuruw.pdfIn PDF document text
    • https://haps.company/wp-content/plugins/super-forms/uploads/php/files/tjijibohpv9ve03qbku93phvb3/dapaguvase.pdfIn PDF document text
    • http://proxima-design.cz/files/file/34630356792.pdfIn PDF document text
    • http://asalsold.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609b35d5f0e38---40203048135.pdfIn PDF document text
    • http://jingluo.net/uploadfiles/files/vesopegitumanaxoj.pdfIn PDF document text
    • https://humantouchtranslations.com/wp-content/plugins/formcraft/file-upload/server/content/files/1/160aa62b9e4a0e---21638069580.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_off0000ee35.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEE35 16716 bytes
SHA-256: 6e4c8893ae4903fa359a1c2c6c14aad6627db922532386869d9103c8fe4ea8f4
font_01_sfnt_off00011981.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11981 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00013198.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13198 10664 bytes
SHA-256: 3bd4c4641b6143b71f04941848a0fe874601759f0eeac9931a8217dbba2ad5c4

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