Malicious PDF — malware analysis report

Static analysis result for SHA-256 9d09ac6388fd4dfa…

MALICIOUS

PDF

112.4 KB Created: 2021-09-13 07:00:23 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26
MD5: c116b84ac647255efaf4454ba8c0d01b SHA-1: 0e24ffbd2c84f9b3f29ea573f7b865822557441a SHA-256: 9d09ac6388fd4dfabab30363e6d4c20b39a17f3a194fe237ff1a6ce12a5adb47
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file was flagged as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. The presence of numerous embedded URLs pointing to a link farm suggests a phishing or redirection scheme. Although no scripts were explicitly extracted, the PDF structure and embedded links are indicative of a malicious document designed to lead users to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9982

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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 http://rassadaspb.com/new/files/file/84279026221.pdf In PDF document text
    • https://www.hed-endo.hr/wp-content/plugins/formcraft/file-upload/server/content/files/161382d707cd9f---gofodokuzigorabugu.pdfIn PDF document text
    • https://ngaa.org.au/application/third_party/ckfinder/userfiles/files/fekojazapito.pdfIn PDF document text
    • https://austarpharma.com/upload/files/dozavedawolaradokigowaju.pdfIn PDF document text
    • https://inchirierielicopter.ro/wp-content/plugins/formcraft/file-upload/server/content/files/16131f185442cb---lalawixuzuxoverawexibo.pdfIn PDF document text
    • http://rowadhr.com/app/webroot/upload/files/xekanagofi.pdfIn PDF document text
    • http://skontrolsengineering.com/file_media/file_image/file/52726186477.pdfIn PDF document text
    • http://damnoen.com/ckfinder/pho/files/wapunopumesupaxozira.pdfIn PDF document text
    • http://baove24h.org/upload/files/34976207571.pdfIn PDF document text
    • http://freetds.net/userfiles/file/75192604927.pdfIn PDF document text
    • http://soundspace.eu/Upload/file/99551437544.pdfIn PDF document text
    • http://www.laterveer-biesenbeek.nl/ckfinder/userfiles/files/21658030038.pdfIn PDF document text
    • http://4els.ru/uploads/images/files/69460064428.pdfIn PDF document text
    • http://www.tsahimmongol.com/uploads/images/files/61437818445.pdfIn PDF document text
    • https://bisnismedsos.com/userfiles/file/vudaxakokaxadifidolejit.pdfIn PDF document text
    • http://freetourscadiz.com/ckfinder/userfiles/files/20393327666.pdfIn PDF document text
    • http://ventensis.lt/public/ckfinder/userfiles/files/sizolinefa.pdfIn PDF document text
    • http://laboratoriologos.it/userfiles/files/sejazepilo.pdfIn PDF document text
    • http://apismorava.eu/docs/leradoje.pdfIn PDF document text
    • https://eliteplacementagency.com/uploads/files/xufewogi.pdfIn PDF document text
    • http://www.rosabrockenhaus.ch/ckfinder/userfiles/files/wirugopemixugususavot.pdfIn PDF document text
    • http://suncitygroup.ir/basefile/suncitygroupir/files/wijutavegibupazijiramo.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/BvfzZFkJO3s/uplcv?utm_term=road+drivers+legacy+mod+apkPDF 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_off00015021.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15021 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off00016838.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x16838 10972 bytes
SHA-256: 83327fab4ad5ba32001a633fe77e2a352c095179c7724dd88cb7f57a6fecaee4
font_02_sfnt_off0001817d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1817D 19508 bytes
SHA-256: 90d27302deea914157340e38ac4eacf12c45bd159c96ce60cd845c08f53bd26f

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