Malicious PDF — malware analysis report

Static analysis result for SHA-256 6f48dd0a9fc1f35c…

MALICIOUS

PDF

78.2 KB Created: 2021-09-05 14:27:01 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: ae641b6f0c43862e6548f64d0e03d740 SHA-1: 093e811b00a558b3ae13928f75567ca3dea839fa SHA-256: 6f48dd0a9fc1f35cae3e4775ed9870354f078b0cdd7f2b5f8a1cd86d4a3a8264
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous links pointing to compromised WordPress sites, indicating a phishing or malware distribution attempt. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' and 'PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM' strongly suggest this malicious intent. While no scripts were directly extracted, the nature of the links and the ML classifier's high confidence score point towards a malicious PDF designed to redirect users to potentially harmful content.

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 http://uyaviation.com/wp-content/plugins/formcraft/file-upload/server/content/files/16077d0b94cd4f---66679045808.pdf In PDF document text
    • https://janeunchained.com/wp-content/plugins/super-forms/uploads/php/files/t8k4t4krmlfpgr7oso85tcvjln/pidesizesenemuz.pdfIn PDF document text
    • http://n2nlah.org/UserFiles/file/vizerogizifo.pdfIn PDF document text
    • http://farmaciafici.com/userfiles/files/liralezuwude.pdfIn PDF document text
    • http://zawayakw.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607149dd0905e---16187938846.pdfIn PDF document text
    • http://www.anjhimayath.com/upload/file/66972372603.pdfIn PDF document text
    • http://ylphs.com/ckfinder/userfiles/files/pemozisexasixofe.pdfIn PDF document text
    • http://pavcargo.ru/wp-content/plugins/super-forms/uploads/php/files/508eb45c796afa739ca9f8d81e8d2d67/kunozugupuvuz.pdfIn PDF document text
    • http://ar-intl.net/wp-content/plugins/super-forms/uploads/php/files/7beecniojmqlpss7rd2kb7maj6/nutedotelibijenekulutaleb.pdfIn PDF document text
    • http://crackershrimp.com/file_media/file_image/file/bunowinapowis.pdfIn PDF document text
    • https://privatecambodiatour.com/userfiles/file/lugokivisudewoloj.pdfIn PDF document text
    • https://agsposure.org/wp-content/plugins/super-forms/uploads/php/files/8833de32f81d87a1fe4eddaab29002f9/55879099085.pdfIn PDF document text
    • https://www.dishdivvy.com/wp-content/plugins/super-forms/uploads/php/files/49336f9d7add297c87f35d896c552649/vivipolep.pdfIn PDF document text
    • https://guineaservicesproviders.com/gsp/files/64349338356.pdfIn PDF document text
    • https://aucordechasse.fr/vosImages/43849722239.pdfIn PDF document text
    • http://lohs69.com/clients/82366/File/lovinuseditijugo.pdfIn PDF document text
    • https://bushregenerators.net/userfiles/files/gimunavawemeke.pdfIn PDF document text
    • http://rittenhousereunion.com/clients/a/ad/ad7d26974070b67854a29702aed78614/File/50433444473.pdfIn PDF document text
    • https://danielstrehlau.com/userfiles/file/sinivut.pdfIn PDF document text
    • http://aunay-sous-auneau.fr/ckfinder/userfiles/files/dezuwikurokezi.pdfIn PDF document text
    • http://www.eflox.net/wp-content/plugins/formcraft/file-upload/server/content/files/160aabefa4da6a---76484279673.pdfIn PDF document text
    • http://evohome.pl/userfiles/file/66405262373.pdfIn PDF document text
    • http://ifaistos.reality.gr/~triantaf/images/file/nolaruwetar.pdfIn PDF document text
    • http://aaaexpressac.com/userfiles/file/tafoguwikugojugetexulid.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/S30rS-6n6vg/uplcv?utm_term=business+plan+project+class+12+pdfPDF 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_off0000cd6a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCD6A 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000e57c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE57C 17316 bytes
SHA-256: e19de8519c444fcf49c71bd5d7e0b1aadd2d17e9401644fec16cd8b5f1dad74a
font_02_sfnt_off00011162.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11162 11068 bytes
SHA-256: 110f88a6e420c9d69e6b9cdd0211751095afb4ec25f5b4e1e6e8c405f84f5871