Malicious PDF — malware analysis report

Static analysis result for SHA-256 90a26f81c95b16ad…

MALICIOUS

PDF

79.7 KB Created: 2021-09-16 20:10:17 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23
MD5: 9862f520e6797bd5d182d501c6e00a51 SHA-1: 7beadf2707c063dfac4169e57025b47d4e521265 SHA-256: 90a26f81c95b16ad82411cff83fdc981da105f6009cee13929f057d5e131697d
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains numerous embedded URLs, many of which point to unknown domains and appear to be part of a link farm designed to redirect users. The file's structure and the presence of multiple external links suggest it is intended to lure users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9985

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://vipbeachhouse.com/uploads/editor/file/memaliriw.pdf In PDF document text
    • http://rlponder.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/foxesizuki.pdfIn PDF document text
    • https://ntiverification.com/userfiles/file/dajafuwiwo.pdfIn PDF document text
    • https://manage3.realtourvision.com/rtv/ckfinder/userfiles/images/files/lisabakapifa.pdfIn PDF document text
    • http://argra.rs/wp-content/plugins/formcraft/file-upload/server/content/files/1613994a531f20---5744120573.pdfIn PDF document text
    • https://turkeyinsurance.info/images/file/85446952545.pdfIn PDF document text
    • https://matrainagycsalados.hu/userfiles/file/dafifogekumeraxow.pdfIn PDF document text
    • http://demenagements-remond.fr/userfiles/file/20210906015947.pdfIn PDF document text
    • https://cfi-registration.amyhalter.com/buzzboxgift/img/userfiles/files/74074262414.pdfIn PDF document text
    • https://vendax.ro/files/file/nisorubewafoxegilugi.pdfIn PDF document text
    • http://zhxndl.com/uploadfiles/files/benotidurevute.pdfIn PDF document text
    • http://old.bgk-meshkova.com/ckeditor/ckfinder/userfiles/files/tapadaniwuwatonope.pdfIn PDF document text
    • https://getadoc.in/ckfinder/userfiles/files/80792720530.pdfIn PDF document text
    • http://rajskiewakacje.pl/userfiles/file/76758259648.pdfIn PDF document text
    • http://ministerium.pt/files/26227003452.pdfIn PDF document text
    • http://bumsnab.ru/uploads/files/75070781631.pdfIn PDF document text
    • http://www.taylormadetc.com/siteadmin/ckfinder/userfiles/files/mitatetaxotututat.pdfIn PDF document text
    • http://zjhywt.com/images/upload/File/58342456842.pdfIn PDF document text
    • http://ktcz.eu/files/files/kuwadufurevulaj.pdfIn PDF document text
    • http://kindervakantieweekdeurne.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1613fd8e7e4db1---renuradudeten.pdfIn PDF document text
    • http://skrn.cz/pic/file/pimupalomiwiku.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/1KS0DP0cxss/uplcv?utm_term=prince+reagan+novel+read+onlinePDF 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_off0000d51b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD51B 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000ed32.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xED32 10348 bytes
SHA-256: c320b55e97693dbb5912b215f9cecb9c63eec70c9c6387273e6b438d39dd3285
font_02_sfnt_off00010466.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10466 17348 bytes
SHA-256: 353fd9abd6000a4616ad1a748420035e4ee631e10edef2d419e1329caaf13a80

Open this report in the interactive analyzer, or submit your own file for analysis.