Malicious PDF — malware analysis report

Static analysis result for SHA-256 f480fad482836eb7…

MALICIOUS

PDF

75.7 KB Created: 2021-09-19 21:07:37 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23
MD5: 886d420feb467a5883d94dc87a85f9da SHA-1: e8668665c7e78cef6b8bfa78a57112d9ec2c8667 SHA-256: f480fad482836eb70d428e123d5ce8c2d95d6687f224ca30bb9fcbc2646df9b4
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1190 Exploit Public-Facing Application

The PDF contains embedded JavaScript and multiple external URIs, indicating a malicious intent to redirect the user. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' and the numerous unknown-reputation URLs suggest a phishing or malware distribution campaign. The ML classifier and ClamAV detection strongly support the malicious verdict.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9963

Heuristics 7

  • 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.
  • Callback phishing phone lure medium SE_CALLBACK_LURE
    Document asks the user to call a phone number in billing, refund, subscription, fraud, or security context — consistent with callback phishing or tech-support scam patterns. Suppressed for legitimate-issuer (IRS/gov/official-form) documents that carry no urgency or charge/dispute escalation.
  • 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://laborke.ru/uplcv?utm_term=update+pubg+lite+new PDF link annotation
    • https://viadagio.be/userfiles/file/nezimunom.pdfIn PDF document text
    • https://wolfgang-photography.com/userfiles/files/84555791444.pdfIn PDF document text
    • http://lamarchesainterita.be/lamarchesainterita/imgdb/news/files/79797113045.pdfIn PDF document text
    • http://thanglong.vn-greenenergy.com/ckfinder/userfiles/files/39593491484.pdfIn PDF document text
    • http://quimis.net/js/ckfinder/userfiles/files/69475977871.pdfIn PDF document text
    • https://apartmani-mestrovic-krk.hr/files/ninizoxudusipoweziri.pdfIn PDF document text
    • https://uzunlarpeynir.com/dursun/upload/files/57148645258.pdfIn PDF document text
    • https://www.vibrationmonitoring.asia/wp-content/plugins/formcraft/file-upload/server/content/files/1613b7412a3897---mifik.pdfIn PDF document text
    • http://zoscm.zohukum.com/ckfinder/userfiles/files/3925039657.pdfIn PDF document text
    • http://s13cf5ef.alojamientovirtual.com/ropalaboralbarata.com/userfiles/file/peletazubalo.pdfIn PDF document text
    • http://yilip.net/userData/board/file/bokajituvifevomosos.pdfIn PDF document text
    • https://deesudcoolingtower.com/userfiles/file/xatibabutam.pdfIn PDF document text
    • http://f-okinawa.com/img/tmp/files/21562536167.pdfIn PDF document text
    • https://olivier-daulte.com/ckfinder/userfiles/files/wodavatubap.pdfIn PDF document text
    • https://appchecar.com/ckfinder/userfiles/files/28465207064.pdfIn PDF document text
    • http://energcomb.net/cms_enercomb/sgi_userfiles/userfiles/files/xasokapevojanirojexep.pdfIn PDF document text
    • http://casadiriposomarsala.it/userfiles/files/mivinogujafepijosuma.pdfIn PDF document text
    • http://ghettaetamionarchitetti.it/userfiles/files/jorexobaparemawutomiz.pdfIn PDF document text
    • http://learnersdigest.org/userfiles/file/sebodosusasemokakep.pdfIn PDF document text
    • http://studiodebiaggi.eu/userfiles/files/worebixisiza.pdfIn PDF document text
    • http://kaizousha.com/js/upload/files/80143765354.pdfIn PDF document text
    • https://morethancars.eu/uploads/edytor/file/kewilijeweditanurowizov.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_off0000c0fd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC0FD 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000d914.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD914 10512 bytes
SHA-256: a0f539cb33f3d5b02234a8ff4a3fc5d728f17ceb48ab513e6ffacc9f474e548a
font_02_sfnt_off0000f0af.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF0AF 18804 bytes
SHA-256: 82ab1e8ca82f978c24dcf095e095077df8f4bcb4accdda1e200b5697d960bea9