Malicious PDF — malware analysis report

Static analysis result for SHA-256 e2927b9bf0ee8036…

MALICIOUS

PDF

81.2 KB Created: 2021-09-09 03:09:22 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26
MD5: 45aa4a96af18c3a9c3ce25b8e74cba7a SHA-1: c14f7f8e0ebcaf582d58773f8b3176a5e8beef20 SHA-256: e2927b9bf0ee803678fac25cafd1cd3a1a22259245c8564e9fc201bf19512497
134 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The sample is identified as a malicious PDF by ClamAV and an ML classifier. It contains embedded JavaScript and numerous external URIs, many of which point to a link farm structure. The PDF likely exploits vulnerabilities or uses social engineering to redirect users to these external links, which may host further malicious content or phishing pages.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9974

Heuristics 6

  • 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.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • 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://lawyermo.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/zutaf.pdf In PDF document text
    • https://clic-essc.ch/ck/ckfinder/userfiles/files/xuwitagaluloradatamava.pdfIn PDF document text
    • http://cuborh.com/natelinhanew/js/ckfinder/userfiles/files/34325101322.pdfIn PDF document text
    • http://e-skala.pl/userfiles/file/42247325409.pdfIn PDF document text
    • http://www.predoisiasociatii.ro/wp-content/plugins/formcraft/file-upload/server/content/files/16134fa6fe6208---fuzimumobasa.pdfIn PDF document text
    • http://studio-castiglioni.com/userfiles/files/13377129954.pdfIn PDF document text
    • http://neodev.space/wp-content/plugins/formcraft/file-upload/server/content/files/16137578a27824---paguwupejukotaxuzudurem.pdfIn PDF document text
    • http://ferien-in-zahren.de/images/file/xonawatenelozugaridomux.pdfIn PDF document text
    • http://duepassidalcentro.it/userfiles/files/50380393827.pdfIn PDF document text
    • http://visit-pune.com/userfiles/file/wososoverunebimipumojeg.pdfIn PDF document text
    • http://thuocnam.xyz/images/files/koketolajudunividetileb.pdfIn PDF document text
    • http://youngthisyear.com/ckfinder/userfiles/files/8364992700.pdfIn PDF document text
    • http://www.cottagegrad.ru/files/file/33640566609.pdfIn PDF document text
    • https://aneri12.eu/res/file/soven.pdfIn PDF document text
    • http://timavoshipsupply.it/userfiles/file/pipusavu.pdfIn PDF document text
    • https://mlspoland.co/files/file/24959929365.pdfIn PDF document text
    • http://tunesistudio.eu/userfiles/files/dixezelepopafi.pdfIn PDF document text
    • https://www.htlexpress.com/ckfinder/userfiles/files/85458903206.pdfIn PDF document text
    • https://telewebmarketing.com/FCKeditor/file/292098029.pdfIn PDF document text
    • https://kingdomdatesuae.com/userfiles/files/zigedotu.pdfIn PDF document text
    • https://clinicscrm.com/img/files/rulakobofazatonugubevakab.pdfIn PDF document text
    • https://floridainvestment.cz/files/file/72148774358.pdfIn PDF document text
    • http://friulanapanini.com/images/file/65128395405.pdfIn PDF document text
    • http://ahdjcm.com/upload/files/bojowoforusimakome.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/ngfLrbzwjls/uplcv?utm_term=imo+video+call+recording+appPDF 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_off0000db9b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDB9B 16804 bytes
SHA-256: 4740918db9a774519a5ff72db8811c02d651af8f6efa3ff02348c36a562ac369
font_01_sfnt_off0001076a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1076A 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00011f81.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11F81 10608 bytes
SHA-256: 6fb7dd67f876106643aca836ea055af37c7dd881a04f5486fa267e4b0d423290

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