Malicious PDF — malware analysis report

Static analysis result for SHA-256 e682491d78e581b0…

MALICIOUS

PDF

71.7 KB Created: 2021-09-14 12:13:52 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26
MD5: d89f4299ba30ecca67a268d675d9bbd2 SHA-1: 7e13f4bd8ff44c2bfab3f5d365de0c4e6946d59c SHA-256: e682491d78e581b0da8557db3800e1217106776b867e53175398cddc95987f5b
196 Risk Score

Malware Insights

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

The PDF contains numerous links to potentially compromised websites, disguised as search results for software downloads. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or distributing further malware. The presence of external URIs and link farms suggests an attempt to redirect users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9965

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • LOLBin token sequence in document text high SE_LOLBIN_RUN_COMMAND
    Extracted document text contains a Windows script/execution tool name (PowerShell, mshta, cmd, rundll32, regsvr32, …) within 220 characters of a dangerous flag, command verb, or URL. This is a visible 'run this' instruction in HTML/PDF/RTF lure bodies, or — in macro-laden Office files — the macro's own string-pool entries appearing adjacent in extracted text.
  • 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://pocatellocampfire.com/wp-content/plugins/super-forms/uploads/php/files/aesit0telqjirf8cmdue50ftsv/puvizepodaxanexa.pdf In PDF document text
    • https://www.pessin-location.fr/ckfinder/userfiles/files/34910155319.pdfIn PDF document text
    • http://quantri.thaisonpalacehotel.com/upload/files/winejegorojadage.pdfIn macro / runtime command snippet
    • http://allier.proximeo.com/ckfinder/userfiles/files/beboruzaxukedeg.pdfIn PDF document text
    • http://totalfinance.ca/wp-content/plugins/formcraft/file-upload/server/content/files/1613dbfca9a0ea---lapawumukuwevozufutix.pdfIn PDF document text
    • https://angkalaris.com/contents/files/mobumoti.pdfIn PDF document text
    • https://asiarsolutions.com/userfiles/file/7135942232.pdfIn PDF document text
    • http://kiavysocina.cz/UserFiles/File/judelajikolaxixafomog.pdfIn PDF document text
    • https://alansglobalservices.com/ckfinder/userfiles/files/paxepajamoralomafuwalut.pdfIn PDF document text
    • http://alpinedelhi.com/userfiles/files/81417700401.pdfIn PDF document text
    • http://dakhoanhanai.com/images/files/69236677666.pdfIn PDF document text
    • http://iamsoldierfit.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613bccbd18482---207108984.pdfIn PDF document text
    • https://snowcat.pl/admin/ckfinder/userfiles/files/raraniwinaxoxof.pdfIn PDF document text
    • http://studiolauramoschini.it/userfiles/files/gesux.pdfIn PDF document text
    • http://vlaamspatientenplatform.be/_plugin/ckfinder/userfiles/files/pagorujijo.pdfIn PDF document text
    • https://klubkanine.com/home/klub/public_html/ckfinder/userfiles/files/gupowijoku.pdfIn PDF document text
    • http://teusz.pl/UserFiles/file/26376914162.pdfIn PDF document text
    • http://armanetti.com/images/43595932121.pdfIn PDF document text
    • https://metroguards.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/1613af5ae60b63---tawezobitev.pdfIn PDF document text
    • http://gugugroup.com/userfiles/vusodanowogipawamewod.pdfIn PDF document text
    • http://jcnjl.com/userfiles/files/66578716738.pdfIn PDF document text
    • https://www.generalutilities.com/wp-content/plugins/formcraft/file-upload/server/content/files/161327da56fe67---3066539504.pdfIn PDF document text
    • https://www.pessin-locationIn macro / runtime command snippet
    • https://feedproxy.google.com/~r/skout/mBVl/~3/cv9VXjIrmdE/uplcv?utm_term=budokai+tenkaichi+3+iso+downloadPDF 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_off0000b625.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB625 10872 bytes
SHA-256: abaefb89860839995d312926bb1c98f29f68f936e1749bba14c8ca635e155556
font_01_sfnt_off0000cf56.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCF56 16436 bytes
SHA-256: b8a82af5f07419e4679483cfe3938543afea4d72777448c676e06c17e16ef3c7
font_02_sfnt_off0000f98b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF98B 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1