Malicious PDF — malware analysis report

Static analysis result for SHA-256 b9b13500e4c7c961…

MALICIOUS

PDF

66.4 KB Created: 2021-09-13 21:19:14 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: 3e914fa0a92467111f6d018dc22d0f1b SHA-1: a29a2c356ef9a98f17ffce6943ba35d3ac096af6 SHA-256: b9b13500e4c7c96121dbd6c94ff56c78dcc5bd551caa6bdec8a32dd3c4acd9e6
124 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous embedded URLs pointing to external domains, many of which are structured as link farms. The ClamAV detection and ML classifier indicate malicious intent, likely phishing or malware delivery. Although no scripts were explicitly extracted, the PDF structure and embedded URIs suggest it's designed to lure users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.6824

Heuristics 4

  • 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
  • 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://philabc.ru/uplcv?utm_term=real+call+recorder+apk PDF link annotation
    • http://honeycontacts.com/uploades/userfiles/file/95406627503.pdfIn PDF document text
    • http://fitviewer.info/files/file/gelugiposatofikopokopez.pdfIn PDF document text
    • https://www.blackandwhite-salon.com/wp-content/plugins/super-forms/uploads/php/files/tmp/rotiborefusujaronax.pdfIn PDF document text
    • http://www.schule.havonix.com/ckfinder/userfiles/files/widowomaluzapezusetilireg.pdfIn PDF document text
    • https://kompaspt2.com/contents/files/98665081716.pdfIn PDF document text
    • http://snuhonors.com/userfiles/file/24184485165.pdfIn PDF document text
    • https://skl.deindrukdemo.nl/upload/files/fuvejibobirivatuzos.pdfIn PDF document text
    • http://yongchengtech.com/uploads/files/202109070255576873.pdfIn PDF document text
    • http://pokeocncafe.com/uploads/files/12154718158.pdfIn PDF document text
    • http://reklamavysocina.cz/UserFiles/File/jekovu.pdfIn PDF document text
    • https://comfort8889.com/upload/files/31182671275.pdfIn PDF document text
    • http://wjvanderheidedienstverlening.nl/uploads/file/67111162904.pdfIn PDF document text
    • http://tokyosushilohaus.com/uploads/files/30259104181.pdfIn PDF document text
    • http://armanetti.com/images/zexigugib.pdfIn PDF document text
    • http://clairerolo.com/userfiles/file/lewevaridixoj.pdfIn PDF document text
    • https://eyetracking.pl/userfiles/file/70750505099.pdfIn PDF document text
    • https://mosaicopeoplecorporation.com/ckfinder/userfiles/files/jesebas.pdfIn PDF document text
    • https://floridainvestment.cz/files/file/nowenumawize.pdfIn PDF document text
    • http://www.europesolidaire.eu/userfiles/files/sazujawatopuxitupedoxifiw.pdfIn PDF document text
    • http://maslatalaia.com/userfiles/file/lejimasifokasajar.pdfIn PDF document text
    • http://trineckevzdelavani.cz/webpagebuilder/ckfinder/userfiles/files/waguwor.pdfIn PDF document text
    • https://hmv.ir/wp-content/plugins/formcraft/file-upload/server/content/files/1613221cecb1fb---1085748537.pdfIn PDF document text
    • http://drxzhang.com/userfiles/file/vasoxajejesixitamoderasup.pdfIn PDF document text
    • http://xn----7sbjvweekof5d.xn--p1ai/files/files/nuvegegupitapuk.pdfIn PDF document text
    • http://cinebuzz.be/uploads/userfiles/files/woredepagoxevumu.pdfIn PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ed52.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xED52 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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