Malicious PDF — malware analysis report

Static analysis result for SHA-256 3e32da9460bb9f1e…

MALICIOUS

PDF

77.9 KB Created: 2021-07-06 19:01:17 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 4fee52d4d66153d12120c3f692e5613e SHA-1: 91449f074a7c18af74384f0ea2ca1d99ebc85872 SHA-256: 3e32da9460bb9f1e4626c56656de6c46eac5e99e3d40d1164529ccec98b5ea74
156 Risk Score

Malware Insights

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

The PDF contains numerous links pointing to various domains, many of which are associated with compromised CMS uploads or appear to be disposable hosting. The ML classifier and ClamAV detection strongly indicate malicious intent, likely to redirect users to phishing sites or download further malware. No scripts were extracted, but the structure itself is designed to host a link farm.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9963

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://peaktoppet.com/ck_imgs/files/47314138383.pdf
    • https://abugfreemind.com/userfiles/file/wipurutakebadorabomupe.pdf
    • https://loan-financial.com/wp-content/plugins/super-forms/uploads/php/files/d47fe31c44a9db753f9b933601f3ea21/faduwonuneli.pdf
    • http://maxitelt.no/wp-content/plugins/formcraft/file-upload/server/content/files/160b5e81242e03---55844830223.pdf
    • http://www.dj-csnl.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1607dbc2622645---narawofu.pdf
    • http://gennarimaq.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1608f905a64446---nomenokuso.pdf
    • http://paymentsbusiness.ca/wp-content/plugins/formcraft/file-upload/server/content/files/1607fe08c58c4a---xazuwikewogalijex.pdf
    • http://www.nandomoraes.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1607b321ce3884---japubomulajuxiwilezukigu.pdf
    • http://www.fullmooneye.com/wp-content/plugins/formcraft/file-upload/server/content/files/160afe5d2d19c3---bobaxibutug.pdf
    • https://3dreamstudios.com/wp-content/plugins/super-forms/uploads/php/files/759312520ba0894a9700e59a068df352/sezufe.pdf
    • http://assistance.uz/images/shared/file/rasexezeranedomifusiw.pdf
    • http://www.theflightfest.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607e6726497fa---bexefodari.pdf
    • https://www.abaco-engineering.it/wp-content/plugins/formcraft/file-upload/server/content/files/160ad7b2557e0d---muxagu.pdf
    • http://azseal.net/uploads/userfiles/file/fuzowola.pdf
    • https://smarttactic.ro/wp-content/plugins/formcraft/file-upload/server/content/files/160a9dacd0377d---pavuroko.pdf
    • http://nature-revive.org/files/file/24839736543.pdf
    • http://gezond-trakteren.nl/kasteel-doornenburg-img/bestandenfile/79512396784.pdf
    • https://razdolle.by/wp-content/plugins/super-forms/uploads/php/files/v3n17mv4j9kaqd7man4m0m2gs1/26877234939.pdf
    • https://neoville.ru/wp-content/plugins/super-forms/uploads/php/files/23b4c6aaba49a75251a213905c92c46a/gunanitivuzegitarizazut.pdf
    • https://orsolyajuhasz.com/ckfinder/userfiles/files/nawefifakafafevemeko.pdf
    • https://highrise.pl/file/90841278430.pdf
    • https://www.swx.global/wp-content/plugins/super-forms/uploads/php/files/8951f9ed53dbac2f1a4afa16a430a815/29195033958.pdf
    • https://feedproxy.google.com/~r/skout/mBVl/~3/cv9VXjIrmdE/uplcv?utm_term=league+of+angels+heaven%27s+fury+pack+code
    • 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_off0000cab7.bin
f2094d939e26d262b4983006278ced49e7f66c26849f4052087a4f62d057289c
pdf-font-stream PDF embedded font (sfnt) at offset 0xCAB7 11072 bytes
font_01_sfnt_off0000e44e.bin
31d05f9a620f362cdb258ab9a18126217b8bd735bb1647f5905815ba69e4b53b
pdf-font-stream PDF embedded font (sfnt) at offset 0xE44E 17368 bytes
font_02_sfnt_off0001123f.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x1123F 16792 bytes