Malicious PDF — malware analysis report

Static analysis result for SHA-256 1e01fa4b5ceb65ed…

MALICIOUS

PDF

80.5 KB Created: 2021-06-29 07:56:46 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: da204ab49e93c7e6a0103811e5dfc41c SHA-1: 74bc2fa755d3ce8f19529d23368ed046e32f60ca SHA-256: 1e01fa4b5ceb65ed651061526ee2fdc310f83a618d28aa6833f622b07a3fd62a
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file functions as a link farm, directing users to multiple external websites hosted on compromised CMS platforms. The presence of numerous links, many pointing to WordPress upload directories, indicates an attempt to distribute malicious content or phish for information. While no scripts were directly extracted, the PDF structure and URL patterns are consistent with phishing and content distribution campaigns.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9956

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 https://www.mybizwebsites.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b1d48368748---6052833758.pdf
    • https://jetzterstrecht.hamburg/wp-content/plugins/super-forms/uploads/php/files/qqbigl89slrk70nkigp9cvilgh/96571088533.pdf
    • http://indiebookoftheday.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a9c113ef981---nakager.pdf
    • https://www.psalighting.com/wp-content/plugins/super-forms/uploads/php/files/87600424040b75c8f371262c781903ec/riforerumikejajixi.pdf
    • https://www.rogierstoel.nl/wp-content/plugins/super-forms/uploads/php/files/srlv72ngq1ofsqphkgj80u59su/tizanataximitodomasar.pdf
    • https://poolpoint.be/uploads/file/44155441402.pdf
    • https://best-turbos.com/wp-content/plugins/super-forms/uploads/php/files/d7a6a94676296337568827a6550d534c/11681848981.pdf
    • http://tokyoto.pl/UserFiles/file/nekubemizularedise.pdf
    • https://independentmusicleague.com/wp-content/plugins/super-forms/uploads/php/files/7b5b8fc59a0f4e3d702eb44dfd97b6ae/19853575105.pdf
    • http://www.training4thefuture.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160b0dc9b26eac---42119154706.pdf
    • http://steclotildehorton.ca/wp-content/plugins/formcraft/file-upload/server/content/files/160aaa0171a718---60266831945.pdf
    • http://www.siscbolivia.com/admin/uploaded/fck/file/gujubavezivitige.pdf
    • http://zafirkort.com/uploads/files/41666210974.pdf
    • http://mognational.com/wp-content/plugins/formcraft/file-upload/server/content/files/16078514e24f2b---xojol.pdf
    • https://www.mixedclass.com.au/wp-content/plugins/super-forms/uploads/php/files/0tdhkp8jh3c9l9c4a4utv1r251/89785605720.pdf
    • https://marciasmithconsulting.com/wp-content/plugins/super-forms/uploads/php/files/55d7fcd607a56b0abcd9e91daf3d2aa9/61201404366.pdf
    • https://zweiund40.com/wp-content/plugins/super-forms/uploads/php/files/mmv2udc7vu2phpj8l89vuqkaom/1717228230.pdf
    • http://entone.es/wp-content/plugins/super-forms/uploads/php/files/863e612e9c29560502db04288e463444/wilik.pdf
    • http://larrysiegellaw.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/ruperudud.pdf
    • https://www.areatransfers.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a4fa75655ef---51383338153.pdf
    • https://www.oneirishrover.com/wp-content/plugins/super-forms/uploads/php/files/cd5703edf8a43c1c82c1524322076bbb/11151319082.pdf
    • https://bellevuecommunityfoodbank.org/wp-content/plugins/super-forms/uploads/php/files/9100f013eacedf04d59ca9cde9f32696/70264959209.pdf
    • https://www.ideaklinikkadikoy.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607c831f52b11---4931066546.pdf
    • https://feedproxy.google.com/~r/skout/mBVl/~3/Om9ozkHLxGw/uplcv?utm_term=grilled+turkey+breast+cutlets
    • 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_off0000d40a.bin
c71237595ae1d30adb82968e8250bf2a6aa016d2eaed824b5cabce833093e504
pdf-font-stream PDF embedded font (sfnt) at offset 0xD40A 10624 bytes
font_01_sfnt_off0000ec83.bin
71c564bef95d041ebc50af11aecdeb464bea40d88061192179b3b69f9368e8b5
pdf-font-stream PDF embedded font (sfnt) at offset 0xEC83 18152 bytes
font_02_sfnt_off00011af8.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x11AF8 16792 bytes