Malicious PDF — malware analysis report

Static analysis result for SHA-256 000754ceb8de715f…

MALICIOUS

PDF

84.8 KB Created: 2021-10-05 19:58:05 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-25
MD5: 56336d31978224e8c297a3a98c34fd7b SHA-1: 11dd7baed06763e14a2fbbaf02791a0e2361446d SHA-256: 000754ceb8de715f340465f5490acafa5b5b93a2d997aa76118defee2721099b
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The PDF contains numerous embedded URLs, with heuristics identifying it as a link farm on disposable hosting, suggesting a phishing or redirection scheme. While no scripts were explicitly extracted, the PDF structure and embedded URIs are indicative of malicious activity, likely aiming to lure users to external sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9956

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://www.osteopathe-montpellier-sud.fr/ckfinder/userfiles/files/jojomijaxigiwadigiwovixot.pdf In PDF document text
    • https://textosolutionslinguistiques.com/upload/editor/file/xebegemetipomujemeravipe.pdfIn PDF document text
    • https://www.denisonlandscaping.com/wp-content/plugins/formcraft/file-upload/server/content/files/16145b7ed371fd---43878638795.pdfIn PDF document text
    • http://hykylalumni.org/userfiles/23958157004.pdfIn PDF document text
    • http://bronia.org/userfiles/file/39408073282.pdfIn PDF document text
    • http://itaxabc.com/userfiles/file/20210901193035_1369599425.pdfIn PDF document text
    • http://ap116.ru/userfiles/file/rotegazibufabonavak.pdfIn PDF document text
    • http://heldermusic.nl/ckfinder/userfiles/files/32032208439.pdfIn PDF document text
    • http://narnivet.com/userfiles/files/gitama.pdfIn PDF document text
    • http://sellmysayarah.com/userfiles/files/sunibakuj.pdfIn PDF document text
    • http://www.almansori-ye.com/almansorifiles/files/57834764970.pdfIn PDF document text
    • http://tgroupsrl.com/userfiles/files/101506114.pdfIn PDF document text
    • https://automatisme-portail-bordazzi.fr/userfiles/fichiers/kosaja.pdfIn PDF document text
    • https://handinhand-daycare.com/ckfinder/userfiles/files/55286459038.pdfIn PDF document text
    • https://biserica-izvorul-tamaduirii.ro/files/puxeserewupowitur.pdfIn PDF document text
    • http://ledspectrumthai.com/ckfinder/userfiles/files/kigalewupozol.pdfIn PDF document text
    • http://struttur-arch.it/userfiles/files/12711931140.pdfIn PDF document text
    • http://pixel-pro.ru/upload/file/batovisajomuwutovusam.pdfIn PDF document text
    • https://retrofitoman.com/ckfinder/userfiles/files/sufofuzij.pdfIn PDF document text
    • http://4bx.pl/public/file/55430302616.pdfIn PDF document text
    • https://prospr.fr/ckfinder/userfiles/files/10797399400.pdfIn PDF document text
    • http://pixel-pro.ru/upload/file/62114437412.pdfIn PDF document text
    • http://optometrystaprzemysl.pl/userfiles/file/67393381435.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/S30rS-6n6vg/uplcv?utm_term=best+snapchat+filter+for+clear+skinPDF 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_off0000e2b8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE2B8 19084 bytes
SHA-256: b5f6efc19da82974e72786048624828c4dfec7ee70d8a160c6882a0042bf9528
font_01_sfnt_off00011500.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11500 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00012d17.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12D17 10720 bytes
SHA-256: 43b93a90aae7dad74217367846a2749b548ef7d038d38e2b21f85e8567644d51