Malicious PDF — malware analysis report

Static analysis result for SHA-256 5ec08e209d551604…

MALICIOUS

PDF

85.0 KB Created: 2021-09-23 01:02:46 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: 644ad8d846c62d950c4976150c0ce52d SHA-1: b6b1c29ee48b2be05fae2a55dcbc2b18d812fa06 SHA-256: 5ec08e209d551604cc0dc68dc4d914d46b32ec1c0446a088bcd6ccef8a0c6a90
142 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains embedded JavaScript and numerous external links, many hosted on disposable domains, indicating a phishing or malware distribution attempt. The presence of a visual download button further supports a lure-based attack pattern. ClamAV detection and ML classification confirm the malicious nature of the file.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9974

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.
  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://garglob.ru/uplcv?utm_term=efecto+kettlebell+epub PDF link annotation
    • http://sdtrafficticketlawyer.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/xuperix.pdfIn PDF document text
    • http://ophtalmic-overnight.fr/wp-content/plugins/formcraft/file-upload/server/content/files/1614200046cd13---sebebijonetuz.pdfIn PDF document text
    • https://optimustelecoms.com/ckfinder/userfiles/files/fetaminom.pdfIn PDF document text
    • http://gainliving.com/upload/editor/file/92598456846.pdfIn PDF document text
    • http://mentaplywood.com/images_upload/files/tomixewemidazinax.pdfIn PDF document text
    • https://cam-ceeds.org/ckfinder/userfiles/files/wizefexej.pdfIn PDF document text
    • https://allcreaturesinc.com/files/files/17694446383.pdfIn PDF document text
    • https://www.yoursurveysurveyors.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/161362f0750fce---pofuxigurego.pdfIn PDF document text
    • http://techscreening.com/userfiles/files/gizitazujijitalerejeron.pdfIn PDF document text
    • http://bindashnews.com/userfiles/file/58743162704.pdfIn PDF document text
    • https://fibra-optica.ro/ckfinder/userfiles/files/24422486078.pdfIn PDF document text
    • https://eagleegg5k.com/ckfinder/triplebuserfiles/file/63977787091.pdfIn PDF document text
    • http://www.madiran-cruduparadis.fr/ckfinder/userfiles/files/durevodawuk.pdfIn PDF document text
    • http://mindennapi.hu/upload/file/8658295066.pdfIn PDF document text
    • https://cvssteelex.com/ckfinder/userfiles/files/47100796870.pdfIn PDF document text
    • http://arsvet.ru/img/upload/54704292468.pdfIn PDF document text
    • http://www.dfdtrading.sk/ckfinder/userfiles/files/gezubakuwonoxenodib.pdfIn PDF document text
    • https://speedwayinfo.hu/uploads/file/73632805270.pdfIn PDF document text
    • https://sainaudit.mn/File/jiveritapugutopipofoti.pdfIn PDF document text
    • http://srihemkuntschoolint.com/slbdavbatala/userfiles/file/88824867903.pdfIn PDF document text
    • http://aa-nusd.jp/7654716824.pdfIn PDF document text
    • http://weldingplaza.com/files/file/84257325637.pdfIn PDF document text
    • https://landbar.com/app/webroot/js/ckfinder/core/connector/upload/files/41946945735.pdfIn PDF document text
    • http://borisovhlebprom.by/var/upload/file/sikaru.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_off0000e340.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE340 10160 bytes
SHA-256: 275e19dd163df9b01d5d56b0f83a88095156d08fd14d28828bbec70cc59e482f
font_01_sfnt_off0000f9eb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF9EB 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off000111fd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x111FD 19424 bytes
SHA-256: 74762c4ccc1ccc23ffde939926ca091e4b94e3da839b588d347a6570220c50e7