Malicious PDF — malware analysis report

Static analysis result for SHA-256 0e69683d853b5131…

MALICIOUS

PDF

83.4 KB Created: 2021-06-29 13:48:48 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-08-25
MD5: 1c6947dc633e60a084ee43c4443f29d4 SHA-1: dfc9e1591851063e9cf8fbff144ed7a1162aa1e6 SHA-256: 0e69683d853b5131cd4e0891d9d2f81950b297d28c3dcedfb0805e130d61d88d
236 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

This PDF document exhibits multiple indicators of malicious activity, including a high ML classification score and ClamAV detection as a phishing trojan. The heuristics indicate it functions as a password-protected archive lure and an MFA/one-time-code harvesting lure, suggesting an attempt to trick users into providing credentials or sensitive information. The presence of numerous embedded URLs, many pointing to potentially compromised or disposable hosting, further supports the phishing and malware delivery intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9992

Heuristics 8

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Password-protected archive handoff high SE_PASSWORD_ARCHIVE_LURE
    Document gives password instructions for an archive or attachment — often used to keep payloads encrypted until after gateway scanning
  • MFA / one-time-code harvesting lure high SE_MFA_LURE
    Document asks for a one-time code, authenticator approval, or MFA confirmation — consistent with credential phishing kits that steal session tokens or abuse multi-factor authentication
  • 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 http://aitrans.cn/UploadFile/file/F1202106062301452034.pdf In PDF document text
    • https://renfrewareahealthvillage.ca/ckfinder/userfiles/files/jasutokexoxekan.pdfIn PDF document text
    • https://eduinfinite.com/wp-content/plugins/super-forms/uploads/php/files/44b8d900dfc574dc93541d08fcf12c97/tokijo.pdfIn PDF document text
    • http://bmhs1963.com/clients/7/72/7286fd37811b7a5dece6e69924e4d5ab/File/saweru.pdfIn PDF document text
    • https://opsclown.it/ckfinder/userfiles/files/xixirakisaxuxadijeru.pdfIn PDF document text
    • http://mtsskzy.com/userfiles/file/66207041674.pdfIn PDF document text
    • https://sellerflows.com/wp-content/plugins/super-forms/uploads/php/files/8c6537945743d0ac5d3747363bc6b354/19988541141.pdfIn PDF document text
    • https://watfordfairtrade.org/app/webroot/img/files/borafutiziripalanaru.pdfIn PDF document text
    • https://www.saenger-ohg.de/wp-content/plugins/formcraft/file-upload/server/content/files/16085ded7f1f14---wiwexoku.pdfIn PDF document text
    • https://immobilgold.com/file/64528668207.pdfIn PDF document text
    • http://caycanhtuyhien.com/uploads/image/files/waraxajo.pdfIn PDF document text
    • http://myappartement.de/web/editor/files/40787331336.pdfIn PDF document text
    • https://qamarapps.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608967f49290c---bebikekudovovavubipaluv.pdfIn PDF document text
    • http://allycatering.com/userfiles/fujubirumoku.pdfIn PDF document text
    • https://almoheetmanpower.com/public_html/userfiles/file/kotisu.pdfIn PDF document text
    • https://webmodels.studio/wp-content/plugins/formcraft/file-upload/server/content/files/16073460e266b5---mawupidosagebivowifuto.pdfIn PDF document text
    • https://mamo-tato.ro/userfiles/file/67569861414.pdfIn PDF document text
    • http://chickendaylacrescenta.com/uploads/files/wibumu.pdfIn PDF document text
    • https://pendekaremas.com/contents//files/11335615623.pdfIn PDF document text
    • http://4bx.pl/public/file/2434573925.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/GLLx1DTH0VQ/uplcv?utm_term=i+forgot+the+answers+to+secret+questions+on+yahooPDF 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_off0000e0f5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE0F5 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000f90c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF90C 10964 bytes
SHA-256: db6b94330e799823d5cd5cd585a0cdfe6a5a6f35c7774c4613675ede3f82ecb3
font_02_sfnt_off00011240.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11240 17556 bytes
SHA-256: f6a39fe8da5b7f7b8d0bb113b09b21880e392152a920b57f4d2c322f96a1e620

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