Malicious PDF — malware analysis report

Static analysis result for SHA-256 f1633f43284b8542…

MALICIOUS

PDF

86.2 KB Created: 2021-07-09 07:36:24 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 57fd33ceb51d8be44a276dd3c1c5f95f SHA-1: 9ff15dc81fa3cc5dd1099f873de4bcd17b29b895 SHA-256: f1633f43284b854206409c32f3624099043327310acd5048a1adbd5aad1b830e
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'. The file contains a link farm pointing to numerous websites, many of which are hosted on compromised CMS uploads or disposable domains. The primary purpose appears to be directing users to potentially malicious content or phishing sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9952

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://stitesattorney.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/17044481306.pdf
    • http://pressvaluation.net/userfiles/file/23987349971.pdf
    • https://claphamjunction.com.au/wp-content/plugins/super-forms/uploads/php/files/963084868c0bc69531c9985d8b90719e/26575993642.pdf
    • https://luxartparquet.com/wp-content/plugins/super-forms/uploads/php/files/0b5872ceef368491ae3e5b42f13bc4e6/90700648284.pdf
    • http://terapie-psi.ro/wp-content/plugins/formcraft/file-upload/server/content/files/16071c381efe01---15149328286.pdf
    • https://manuscripthandler.com/userfiles/file/fidip.pdf
    • http://staresecurity.com/userfiles/file/duwopiteduzisuduke.pdf
    • http://julieesteban.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c613715c7e2---42070904236.pdf
    • http://stkvn.ru/wp-content/plugins/super-forms/uploads/php/files/214305981f8d4645e243e60d055a5041/71831231892.pdf
    • https://advicezone.org.uk/wp-content/plugins/super-forms/uploads/php/files/0utcn25742k55bv380n2abdp0g/74099900891.pdf
    • http://www.1atlanticfunding.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607d0d76699f4---81413237162.pdf
    • http://vegasoft.hr/wp-content/plugins/formcraft/file-upload/server/content/files/160ba5bad16163---bepiwenegonimixiniponexev.pdf
    • http://medob.org/SITE/files/editor/file/weridenaxozorejuzuno.pdf
    • https://afriqueitnews.com/wp-content/plugins/super-forms/uploads/php/files/838d0de7be5d8d904b75f70bbe66e92e/boziwesuzamufeg.pdf
    • http://vyveva.eu/UserFiles/File/8792252939.pdf
    • https://izharfoster.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a2256266ad0---33954567481.pdf
    • http://chi-kara.net/userfiles/file/34798603648.pdf
    • http://megalabsrl.it/userfiles/files/46659748721.pdf
    • http://backkwang.com/userData/board/file/mivopibe.pdf
    • http://stressmanagement-karriere.de/userfiles/file/fuvisidabodatatinovov.pdf
    • http://eventcompany.org/clients/e/e3/e30ef11cf4efe639fe6592aa37b9cb94/File/sopokamozuvew.pdf
    • https://www.bocamvigliesrooms.com/wp-content/plugins/super-forms/uploads/php/files/fba92932c130cf424d0907d28a23922b/20692083355.pdf
    • http://www.liveartsaskatchewan.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b41c1d8faaa---mawupuju.pdf
    • https://feedproxy.google.com/~r/Uplcv/~3/1KS0DP0cxss/uplcv?utm_term=bible+verses+about+the+lords+supper
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000eef1.bin
49a3dfc23f84d6d2faed40640a51db1742ddccaf4b7deb48e7b723cc6b52001a
pdf-font-stream PDF embedded font (sfnt) at offset 0xEEF1 16868 bytes
font_01_sfnt_off00011aad.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x11AAD 16792 bytes
font_02_sfnt_off000132c4.bin
74fda928cd087936d9f55305df21527bfef2187b7fcbd3831fe1358782c8cc1f
pdf-font-stream PDF embedded font (sfnt) at offset 0x132C4 10744 bytes