Malicious PDF — malware analysis report

Static analysis result for SHA-256 0b59ba5014e28854…

MALICIOUS

PDF

70.1 KB Created: 2021-09-26 11:34:13 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26
MD5: 96b86d45ea08c4ef5f54ce0ba1a57477 SHA-1: b6dc299f00a3262de5a7c628dd134c569fe852a9 SHA-256: 0b59ba5014e28854ffe1f9c97c984d726dce13b88eaa54c08d8a1bd1b67032c8
134 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript and a high number of external URIs pointing to various domains, many of which appear to be disposable or low-reputation. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or malware distribution. The embedded JavaScript is a common technique for executing malicious code within PDFs.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9971

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 https://adiwirawanbali.com/wp-content/plugins/super-forms/uploads/php/files/05a2b30a1591aa34f29d23262f08b57c/neravigulilel.pdf In PDF document text
    • https://orderpoet.com/ckfinder/userfiles/files/15836669322.pdfIn PDF document text
    • http://osoboebludo.com/ckfinder/userfiles/files/gofeburobawixud.pdfIn PDF document text
    • https://ashleymongolia.mn/uploads/files/linixateritenekunel.pdfIn PDF document text
    • http://www.sindafaz.com.br/admin/editor/ckfinder/userfiles/files/41793684461.pdfIn PDF document text
    • http://0vote.com/ckfinder/files/nofiwepe.pdfIn PDF document text
    • https://handientu.vn/userfiles/file/digisaregusetukokajo.pdfIn PDF document text
    • http://askaudit.ru/price/25153467569.pdfIn PDF document text
    • https://eecpowerindia.com/codelibrary/ckeditor/ckfinder/userfiles/files/69579629546.pdfIn PDF document text
    • https://smartmedia.ro/app/webroot/files/userfiles/files/49948794912.pdfIn PDF document text
    • https://colakcivi.com/userfiles/file/66053490101.pdfIn PDF document text
    • http://thermogroup.ru/uploads/files/31346557733.pdfIn PDF document text
    • http://thetsaban3watnuea.com/UserFiles/file/bedanixurijoxivuduv.pdfIn PDF document text
    • http://ebus.cn/up_file/file/43441143427.pdfIn PDF document text
    • https://cncunse.com/d/files/tavavifekabutenipafu.pdfIn PDF document text
    • http://ozona.pt/js/fckeditor/editor/filemanager/connectors/wysiwygfiles/file/fuwosa.pdfIn PDF document text
    • http://vladekoservis.ru/files/gajununepobavudopek.pdfIn PDF document text
    • https://lifecareproduct.in/ckfinder/userfiles/files/pabixeminogijekipo.pdfIn PDF document text
    • http://studiozoppini.com/userfiles/files/26416052399.pdfIn PDF document text
    • http://sourceandsecure.com/uploads/userfiles/file/zezutavixuvitogunesasutuw.pdfIn PDF document text
    • http://cristal-in.fr/userfiles/file/bodisanexudiwonegopureze.pdfIn PDF document text
    • https://airbays.com/userfiles/file/kafapitinuwexebedafo.pdfIn PDF document text
    • http://osayit.com/images/file/serop.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/1KS0DP0cxss/uplcv?utm_term=22+degrees+to+radiansPDF 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_off0000af01.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xAF01 16696 bytes
SHA-256: bb10e0f6f023c8024743bc8134f4305e918962e7124658bbd73b0cfd62b6c175
font_01_sfnt_off0000d9bf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD9BF 10400 bytes
SHA-256: 6941cb37889e0004addcb09e1c2b1380534eae6e0580f66be5db7843022c0a4f
font_02_sfnt_off0000f141.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF141 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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