Malicious PDF — malware analysis report

Static analysis result for SHA-256 bafe3d1ee03a2b2c…

MALICIOUS

PDF

80.7 KB Created: 2021-09-12 18:59:28 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: d3e9cecf328bbb771729f820f252c5bf SHA-1: a2815696ec8e7651579841388ac6532004d08404 SHA-256: bafe3d1ee03a2b2cf06a4acdae3600a6fc605f7c765ca20e4570fa47933cdc2b
156 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics as malicious, including a critical ClamAV detection for 'Pdf.Phishing.Trojan'. It functions as a link farm, with numerous embedded URLs pointing to various websites, some of which are hosted on compromised CMS platforms. The ML classifier also strongly indicated maliciousness.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9968

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://amezdigital.com/wp-content/plugins/super-forms/uploads/php/files/832a14a0553112633727e71d47d70bda/84129352672.pdf In PDF document text
    • http://www.heatandgas.com/EditorImages/file/bijevedobutipusat.pdfIn PDF document text
    • http://loscogliodifavignana.it/userfiles/files/konulubu.pdfIn PDF document text
    • http://gingerwooddesign.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613a94a6aa363---jilos.pdfIn PDF document text
    • http://angel-conference.org/upload_fck/file/2021-9-9/20210909041308964186.pdfIn PDF document text
    • http://prime-standard.com/piceditor/file/25778284642.pdfIn PDF document text
    • http://www.linkkorea.co.kr/wp-content/plugins/formcraft/file-upload/server/content/files/1613bdb29794ce---zexalagesova.pdfIn PDF document text
    • https://www.techsrollout.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613c427f4df08---votakozopavatib.pdfIn PDF document text
    • https://cdmsig1.com/ckfinder/userfiles/files/maxikonefimowoxasojed.pdfIn PDF document text
    • http://bagpack.com.np/wp-content/plugins/formcraft/file-upload/server/content/files/16137828f21cbe---jowefunukuzexusunixo.pdfIn PDF document text
    • http://hit-air.pro/ckfinder/userfiles/files/tifepugu.pdfIn PDF document text
    • https://oriental-kitchens.com/userfiles/files/65831533100.pdfIn PDF document text
    • http://tsyrulnikov.ru/upload/file/mefup.pdfIn PDF document text
    • http://irvinenott.co.uk/ckfinder/userfiles/files/posoxotaxunutixuz.pdfIn PDF document text
    • http://max-metal.pl/gfx/file/vukubugusurojerifuvi.pdfIn PDF document text
    • https://zlato-stribro-investice.com/upload/files/gineler.pdfIn PDF document text
    • http://lienming-rubber.com/uploads/files/202109100702314495.pdfIn PDF document text
    • https://marupyara.com/fotos/userfiles/file/76874437176.pdfIn PDF document text
    • https://rsun.pro/admin/ckfinder/userfiles/files/wefidazodad.pdfIn PDF document text
    • https://realwebguys.com/wp-content/plugins/formcraft/file-upload/server/content/files/1612f9bb11d221---35261174363.pdfIn PDF document text
    • https://imotrading.com/images/userfiles/18817527838.pdfIn PDF document text
    • https://wacee.net/wp-content/plugins/formcraft/file-upload/server/content/files/16137e58a919ba---3086873186.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/3CAf4wW3hvY/uplcv?utm_term=clash+of+clans+mod+apk+android+1+unlimited+gemsPDF 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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d421.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD421 11344 bytes
SHA-256: 953873e2eefa63e0d5b726084f46be046b38a4622c694bc4af63b16ccdc21cd5
font_01_sfnt_off0000ee78.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEE78 17624 bytes
SHA-256: 31a833e0f6b1ae62e2da723f591b96551df426ea3762cad702c9929e0c41542e
font_02_sfnt_off00011bb7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11BB7 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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