Malicious PDF — malware analysis report

Static analysis result for SHA-256 d89d6bcfbec7670e…

MALICIOUS

PDF

78.6 KB Created: 2021-09-14 11:30:39 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: dd382e09a9f6bb890232c5a057c3ea7a SHA-1: 0df8900bfd6085d1e3433fef06d11f66537c105f SHA-256: d89d6bcfbec7670ef163339269566992da56f95df08c84742f1cfb76bbfeb213
134 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript and numerous external URLs, indicating an attempt to redirect the user to malicious sites. The ML classifier and ClamAV detection strongly suggest malicious intent, likely for phishing or malware delivery. The presence of embedded JS points to T1059.007, and the overall nature of the file as a potentially delivered attachment aligns with T1566.001.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9949

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 https://wastran.ru/uplcv?utm_term=watch+avengers+age+of+ultron+123 PDF link annotation
    • http://andlupa.com/userfiles/file/livotexatakow.pdfIn PDF document text
    • http://yilbasipromosyonu.com/userfiles/file/xavotebifelexib.pdfIn PDF document text
    • http://triatlonbizuterie.cz/sites/default/files/file/toguv.pdfIn PDF document text
    • http://www.palmettoexpresslanes.com/system/js/back/ckfinder/userfiles/files/58527951714.pdfIn PDF document text
    • https://zerling.eu/nico/images/files/96752926174.pdfIn PDF document text
    • https://arabadvertise.com/userfiles/files/61249707537.pdfIn PDF document text
    • http://duquenne-moteurs.fr/webroot/upload/files/85370791107.pdfIn PDF document text
    • http://vidol.eu/userfiles/file/moruvojamizedanozido.pdfIn PDF document text
    • https://isosklo.cz/uploads/41615207939.pdfIn PDF document text
    • https://pt2-turbo-j3t.com/contents/files/mupalemivodabazajifidur.pdfIn PDF document text
    • http://antichigelsi.it/userfiles/files/lagopekasadidenagitebuv.pdfIn PDF document text
    • http://sibleyestateplanning.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/9293011233.pdfIn PDF document text
    • https://rentcar888.com/uploads/files/202109030747473524.pdfIn PDF document text
    • http://medtravel.pro/images/hand_uploaded/files/vegononir.pdfIn PDF document text
    • http://smolensk-bakaleya.ru/userfiles/file/19173086270.pdfIn PDF document text
    • https://xn--z4qq44i.xn--kpry57d/upload/actfiles/sipaxi.pdfIn PDF document text
    • http://infunplastic.com/d/files/julelogogonejowa.pdfIn PDF document text
    • https://matras-matrasych96.ru/admin/ckfinder/userfiles/files/fafukifipomuratajofejuji.pdfIn PDF document text
    • https://dwitunggaljaya.com/sitefiles/file/kuzule.pdfIn PDF document text
    • https://kop-trans.pl/uploads/userfiles/files/36036273843.pdfIn PDF document text
    • http://multiseal.com.ph/wp-content/plugins/formcraft/file-upload/server/content/files/1613d949e02426---zemojukororoxirerew.pdfIn PDF document text
    • http://eraldocomo.it/userfiles/files/tegolobedulivoworidor.pdfIn PDF document text
    • http://badgerhillfarm.uk/tajevikulafejo.pdfIn PDF document text
    • http://jmlukanich.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/50935117777.pdfIn PDF document text
    • https://twinslock.com/ckfinder/userfiles/files/faxipajedegopikoda.pdfIn PDF document text
    • 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_off0000cb72.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCB72 11028 bytes
SHA-256: 9e733487c58e05e726e9d54c3c26fdd570ff949699ff11007727e6dd09b79e70
font_01_sfnt_off0000e548.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE548 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0000fd5a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFD5A 18576 bytes
SHA-256: 0a664cc84352f53b2f041081b271b6fb466d8f8b28c4de7ff5ada1eb6f4dc52a