Malicious PDF — malware analysis report

Static analysis result for SHA-256 2c605b92adcf65b6…

MALICIOUS

PDF

86.6 KB Created: 2021-09-10 02:00:32 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14
MD5: 3d72e16ab5f892086c3b86bd908c99ac SHA-1: 30edc5d069522d0b7fff10bc7fca159e44c4c141 SHA-256: 2c605b92adcf65b65dd79ff9634af57c8485405ab842720da4c15c5b1956d142
156 Risk Score

Malware Insights

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

The PDF contains a link farm pointing to multiple compromised websites, which in turn host other PDF files. This suggests an attempt to obscure the true destination or to distribute malicious content through a chain of redirects. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9953

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://agsposure.org/wp-content/plugins/super-forms/uploads/php/files/060aba06f5e8de3b972a1a598b45a9f9/59797040674.pdf In PDF document text
    • http://ckrestaurantgroup.com/ckfinder/userfiles/files/nifoxilopogokofal.pdfIn PDF document text
    • http://andlupa.com/userfiles/file/ponexutavasibifaxutirer.pdfIn PDF document text
    • http://healhumanity.foundation/userfiles/file/wadipagexerubegosivujodi.pdfIn PDF document text
    • http://straps.by/ckfinder/userfiles/files/81289761104.pdfIn PDF document text
    • http://www.ibadirect.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613392ab03ed3---41457601042.pdfIn PDF document text
    • http://t-p-fortune.com/userfiles/file/nutikimuvaloxemiretalive.pdfIn PDF document text
    • https://lotteppta.com/beta/assets/file/gofogikugavujolupu.pdfIn PDF document text
    • http://aiswaryamatrimonials.com/fck_uploads/file/79110137378.pdfIn PDF document text
    • http://foire-fromages-et-vins.com/wp-content/plugins/formcraft/file-upload/server/content/files/16133dcfc627f5---zajibemivonejidixinow.pdfIn PDF document text
    • https://fundacjaartfreeart.pl/userfiles/file/27224201222.pdfIn PDF document text
    • http://aliancegroup.su/wp-content/plugins/formcraft/file-upload/server/content/files/16134178595581---kusalewu.pdfIn PDF document text
    • http://4x4autok.hu/userfiles/files/gogodakimapurimixazi.pdfIn PDF document text
    • http://novosib-sport.ru/ckfinder/userfiles/files/91353527781.pdfIn PDF document text
    • http://aldobini.it/userfiles/files/lokejeludobatonorer.pdfIn PDF document text
    • http://henanshuangxin.com/d/files/lejujipaxularajolukor.pdfIn PDF document text
    • http://aeklaw.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/fopevupor.pdfIn PDF document text
    • http://isleford.com/filespath/files/20210903060036.pdfIn PDF document text
    • http://wefocusdesign.com/upload/files/83383623620.pdfIn PDF document text
    • http://olsztyntransportmedyczny.pl/userfiles/file/jotazimufejubugewimuxi.pdfIn PDF document text
    • http://emekyesiltepe.net/images_upload/files/83049843228.pdfIn PDF document text
    • http://obkladlazby.cz/userfiles/file/gotabivugokurozafuvuw.pdfIn PDF document text
    • https://postele-z-masivu.sk/ckfinder/userfiles/files/xanodidigimupajenixeneke.pdfIn PDF document text
    • http://vdadanang.vn/app/webroot/assets/files/zekizuluronuwovuroliz.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/DOqCt-cVA4I/uplcv?utm_term=fire+tv+cube+androidPDF link annotation
    • 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_off0000e369.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE369 10432 bytes
SHA-256: 79400d01ce2898f1271ae95c05c36f7bd5ca91d0751402afb20f63244fc8e8a5
font_01_sfnt_off0000fb29.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFB29 2172 bytes
SHA-256: 125a0df2058d2f4e81b8b14f5cb6ac134e605e8991160235d51d1aad56edc4bc
font_02_sfnt_off000104fa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x104FA 18196 bytes
SHA-256: dfd62dea9af73cc7e7c5e0ade7401d694aae5bacd2348dd3e233383df3645092
font_03_sfnt_off0001342f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1342F 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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