Malicious PDF — malware analysis report

Static analysis result for SHA-256 bcc0a922669331af…

MALICIOUS

PDF

80.0 KB Created: 2021-09-14 01:04:15 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-02
MD5: a0a9a0ca3107473753f3bba24be17c6b SHA-1: 4b8c0fe68b68c908245f5bacbf7fce2f7b0d3df6 SHA-256: bcc0a922669331af4fcea8651f22bb5890e2ec3d0d0b6782e4c7da04d3959c0e
134 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript and a high number of external links, many of which are on disposable domains, indicating a phishing or link-farming attempt. The ML classifier and ClamAV detection strongly suggest malicious intent, likely to redirect users to malicious sites for further exploitation.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9975

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://synerhu.ru/uplcv?utm_term=silence+has+no+wings+1966+full+movie PDF link annotation
    • http://agrion.org/upload/fichier/kexudilutaroruj.pdfIn PDF document text
    • http://www.libroparlatolions.it/backoffice/ckfinder/userfiles/files/menab.pdfIn PDF document text
    • https://ostrichtours.com/ckfinder/userfiles/files/xomiginisirilazag.pdfIn PDF document text
    • http://xn--aknmedcal-wpbe.com/uploads/file/83321425623.pdfIn PDF document text
    • http://rehahomecare.com/upload/editor/files/paninelubimanusejasakepuw.pdfIn PDF document text
    • http://gatewayhotelbangkok.com/upfile_hotel/files/nenakalipupubanezumekeze.pdfIn PDF document text
    • https://makojudo.pl/zdjecia/fck/file/dokumonew.pdfIn PDF document text
    • https://shriayurvednagpur.org/public/ckfinder/userfiles/files/7250770578.pdfIn PDF document text
    • http://ccshecea.org/upload/files/jemixuxonikunovisalonefo.pdfIn PDF document text
    • https://deshpanday.com/ckfinder/userfiles/files/87817551109.pdfIn PDF document text
    • http://preiswerte-unterkunft-papenburg.de/mediapool/79512418727.pdfIn PDF document text
    • https://bushregenerators.info/userfiles/files/difuj.pdfIn PDF document text
    • https://radio-clipa.ro/userfiles/file/dobenoketowa.pdfIn PDF document text
    • https://fo-prefectures.com/pages/files/50169822864.pdfIn PDF document text
    • http://nawaress.com/webroot/js/ckfinder/userfiles/files/35265055496.pdfIn PDF document text
    • https://congtydaihai.com/upload/files/zusepogarevesotadutew.pdfIn PDF document text
    • http://garderoba.sk/images/_file/tilasugux.pdfIn PDF document text
    • https://aguiapromocional.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/16134f1b15a93e---wagubosizerabusekeludenu.pdfIn PDF document text
    • http://powercleanperu.com/cms_powerclean_2015/sgi_userfiles/userfiles/files/mujijoxigaxupifexipav.pdfIn PDF document text
    • http://wsystem.sk/userfiles/files/sonugepivepukadezaz.pdfIn PDF document text
    • https://shevtsov-art.com/uploads/files/karuweravugitopu.pdfIn PDF document text
    • http://deleeuwputten.nl/site/data/ws/files/salok.pdfIn PDF document text
    • http://xn--80aagkbrca3apkgkee0a1bi.xn--p1ai/ckfinder/userfiles/files/62316903417.pdfIn PDF document text
    • http://geonatlife.es/ckfinder/userfiles/files/razezub.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_off0000d159.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD159 11300 bytes
SHA-256: 342564bdbb7346fe2ba1f66c1009921dee44bcf49d82e91523e0ce9cc0758cb7
font_01_sfnt_off0000ebb9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEBB9 18024 bytes
SHA-256: 819ebc76d5c291944c4b227d277ef3ce4d34319852fd4af4134d81d743ffbac4
font_02_sfnt_off00011a47.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11A47 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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