Malicious PDF — malware analysis report

Static analysis result for SHA-256 3ba3891849409d47…

MALICIOUS

PDF

69.2 KB Created: 2021-09-29 00:41:38 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-23
MD5: 7c0c20b03aa3bf4fa3e6b86cd128d72d SHA-1: 051d1d9dd608588d1ae03cb5cdeaec181705262e SHA-256: 3ba3891849409d47497515685094d0d65f3bed32b583eac2849349d422eb9006
134 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript and numerous external URIs, many of which are hosted on potentially disposable domains, indicating a link farm designed to redirect users. The ML classifier and ClamAV detection strongly suggest malicious intent, likely for phishing or malware distribution. The presence of embedded JavaScript points to its use in executing malicious actions or further redirection.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9959

Heuristics 6

  • 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.
  • 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://peaceinsrilanka.lk/userfiles/file/67408501592.pdf In PDF document text
    • http://kaithompson.com/userfiles/file/16332942458.pdfIn PDF document text
    • https://keiba-like.biz/js/ckfinder/userfiles/files/foveludivadorebu.pdfIn PDF document text
    • https://kimtuong.vn/isc/public/files/fckupload/file/tiwez.pdfIn PDF document text
    • https://www.grandiosa.is/wp-content/plugins/super-forms/uploads/php/files/vmd1arcpsljrl2kmjmftrdov41/wozofibaloziverojopa.pdfIn PDF document text
    • http://speckrepeg.by/UserFiles/files/78907854335.pdfIn PDF document text
    • http://xn----7sbabjlebzbdsbxti2bw3r.xn--p1ai/files/files/83363773187.pdfIn PDF document text
    • http://crabandclaw.com/uploads/files/51128103126.pdfIn PDF document text
    • http://ziva-muzika.cz/files/file/31310027186.pdfIn PDF document text
    • http://fjzy18.com/image/uload/files/977815338.pdfIn PDF document text
    • https://drbumbnursinghome.in/ckfinder/userfiles/files/wewebarofafisinilijarova.pdfIn PDF document text
    • https://stepweystudy.com/ckfinder/userfiles/files/wazegixataxazipabaxorak.pdfIn PDF document text
    • https://warungmimpishio.com/contents/files/deligujovawudide.pdfIn PDF document text
    • https://biographiewerkstatt-singer.de/userfiles/file/gamubevaxeza.pdfIn PDF document text
    • https://somogyplusz.hu/files/zoxejowirogamimokowav.pdfIn PDF document text
    • https://hebatkeren88.com/contents/files/69307593582.pdfIn PDF document text
    • https://mayxaydungthienlong.com/uploads/files/files/36025498942.pdfIn PDF document text
    • http://cascinamana.it/userfiles/file/76380845020.pdfIn PDF document text
    • http://bhttourist.com/upload/fckimagesfile/59012510291.pdfIn PDF document text
    • http://centralcogtc.com/uploads/file/duxavixo.pdfIn PDF document text
    • https://agencement-menuiserie-var.fr/stockages/files/xodivekazorekiwilovijis.pdfIn PDF document text
    • http://cedresarquitectura.com/wp-content/plugins/formcraft/file-upload/server/content/files/1614d13f8a5a81---6510757454.pdfIn PDF document text
    • https://ladymamashop.com/uploads/files/202109262220438552.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/BkSY9tpko7c/uplcv?utm_term=pretty+pretty+please+less+than+perfect+lyricsPDF 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_off0000adc2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xADC2 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000c5d4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC5D4 15592 bytes
SHA-256: 932cbfd8885bf1e439b51e870afbc9bc84ac05c0c5d7f2f949475f54865e8baf
font_02_sfnt_off0000ed4b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xED4B 10572 bytes
SHA-256: ed60bede9c624abd743a0d9ef4c9b4d6d4d4f340380d873ffbe28bce459429e9