Malicious PDF — malware analysis report

Static analysis result for SHA-256 b3f282ffa92c07f4…

MALICIOUS

PDF

72.6 KB Created: 2021-09-02 22:51:03 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: af7054904906f255420523570326946c SHA-1: 7f103702817a7bc07b234ce5dc1fe025f213c718 SHA-256: b3f282ffa92c07f40c1d43e6700bc43d665ccb138db301e9475df16bf6e71208
156 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It functions as a link farm, containing numerous URLs pointing to various websites, some of which are hosted on compromised CMS uploads. The primary purpose appears to be directing users to potentially malicious or phishing sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9959

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://archism.ru/uplcv?utm_term=trigonom%C3%A9tricas+angulo+doble+ejercicios+resueltos+pdf PDF link annotation
    • https://www.pharmaright.ca/wp-content/plugins/super-forms/uploads/php/files/ued66vkjiv85kgb6oa3hk561ts/55547505082.pdfIn PDF document text
    • https://dotcomtravelegypt.com/userfiles/files/kiwitegigegolopav.pdfIn PDF document text
    • http://www.agrosystem.com.tr/wp-content/plugins/formcraft/file-upload/server/content/files/160c1ba0db7ed0---kutivisixoropu.pdfIn PDF document text
    • http://olneyjune65.com/clients/d/dc/dcef5d22f85ec69f5810ba62c2e8cf46/File/32389442976.pdfIn PDF document text
    • https://lixtech.com.tw/ckfinder/ckfiles/files/komuzorin.pdfIn PDF document text
    • http://viral-list-monster.com/ckfinder/userfiles/publics/files/77848920325.pdfIn PDF document text
    • https://allegypttours.net/userfiles/files/femufodab.pdfIn PDF document text
    • http://sfera-vlad.ru/img/file/79613795426.pdfIn PDF document text
    • https://postele-z-masivu.sk/ckfinder/userfiles/files/10987199077.pdfIn PDF document text
    • https://staffxrecruitment.com/wp-content/plugins/super-forms/uploads/php/files/8dbdc4a9da5e66dbeeaacebdcd8f47c3/takezawutajidomema.pdfIn PDF document text
    • http://harringtonandlombardi.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/64250851831.pdfIn PDF document text
    • http://lt101shop.com/userfiles/files/78952307730.pdfIn PDF document text
    • http://mackielaw.net/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/25141313976.pdfIn PDF document text
    • http://counterreaction.net/wp-content/plugins/formcraft/file-upload/server/content/files/160742662d6597---donowix.pdfIn PDF document text
    • https://alfa-pechati.ru/wp-content/plugins/super-forms/uploads/php/files/ea4fd9217b47851670952fd275771e90/muwunotozikowaba.pdfIn PDF document text
    • http://thermcom.cz/userfiles/file/2761137864.pdfIn PDF document text
    • http://www.expo-hotel.com/english/wp-content/plugins/formcraft/file-upload/server/content/files/16121861dd8d90---47193459237.pdfIn PDF document text
    • https://wfca-czech.cz/temp/userfiles/files/26050421697.pdfIn PDF document text
    • https://spherule.org/wp-content/plugins/super-forms/uploads/php/files/e636ef46a6f7f8657a29c22f019f4fe3/sikerusimudabujak.pdfIn PDF document text
    • https://mavismanagement.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609bd1c0bbc18---99506516622.pdfIn PDF document text
    • http://jinohair.com/upload/files/kotugixesodafeperolutafew.pdfIn PDF document text
    • https://nuregio.de/wp-content/plugins/formcraft/file-upload/server/content/files/160b3934c05a4e---doresisibusan.pdfIn PDF document text
    • https://addsfly.com/userfiles/file/58679120537.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_off0000b5b8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB5B8 11452 bytes
SHA-256: ee0e2988dec1bf8795e8ddc0363ca23d35a47cb4e4c9316cc36f9cce0fda6a04
font_01_sfnt_off0000d002.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD002 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0000e814.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE814 16712 bytes
SHA-256: b0bf6737ad710bbd354f868ec10cd4c1ad99e4818a8313e9eced252fce0470bf

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