Malicious PDF — malware analysis report

Static analysis result for SHA-256 6ca00e9678a2ee46…

MALICIOUS

PDF

80.6 KB Created: 2021-09-13 01:25:30 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: c7313010fae6b7a307ef496222787bea SHA-1: 88132ba4e70626a57ca48cd1a8f54fc5f988eaf8 SHA-256: 6ca00e9678a2ee46dd9ee5f458f806cdc463aad6e47c830e351a799bc11ded6a
134 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript, which is a common technique for malicious PDFs to execute code or redirect users. The PDF_SEO_DISPOSABLE_LINK_FARM heuristic indicates the document is a link farm on disposable hosting, and numerous unknown URLs were extracted, suggesting a phishing or scam attempt. ClamAV also detected this file as Pdf.Phishing.Trojan.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9960

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://www.phsdcenter.com/temp/js/ckfinder/userfiles/files/92368165106.pdf In PDF document text
    • http://www.miamiairportlimo.net/wp-content/plugins/formcraft/file-upload/server/content/files/161303d240ae16---xukemuxugalepasezofo.pdfIn PDF document text
    • http://e-park.es/img/uploads/files/72257343219.pdfIn PDF document text
    • http://luckysim.com/userfiles/file/rafuj.pdfIn PDF document text
    • http://greenlivinggarden.com/htdocs/UserFiles/file/72872088073.pdfIn PDF document text
    • https://avenirpourtous.fr/wp-content/plugins/formcraft/file-upload/server/content/files/16130af6cd783b---vurafapolixujot.pdfIn PDF document text
    • http://scard.vn/app/webroot/uploads/files/wunoxuritufirozosojoliw.pdfIn PDF document text
    • https://samsungdvmklima.com/upload/ckfinder/files/lefopago.pdfIn PDF document text
    • http://wolfpackbasketballacademy.com/content_docs/86758127304.pdfIn PDF document text
    • http://sbsedupatti.com/sbsedupatti/userfiles/file/gezatefusofedopetesowimu.pdfIn PDF document text
    • http://vasekurzy.cz/userfiles/file/fizim.pdfIn PDF document text
    • https://thehouseconcert.com/ckfinder/userfiles/files/92837330162.pdfIn PDF document text
    • http://15441707.com/data/board/file/20210908162031.pdfIn PDF document text
    • http://brno-skoleniridicu.cz/ckfinder/userfiles/files/42845141071.pdfIn PDF document text
    • http://www.detskaoptika.cz/ckfinder/userfiles/files/4218713862.pdfIn PDF document text
    • https://booburger.myagenda.cz/pictures/editor/files/85601952023.pdfIn PDF document text
    • http://sampoernastrategic.com/uploads/image/files/damonebemawisinefono.pdfIn PDF document text
    • http://xycrusher.com/d/files/karune.pdfIn PDF document text
    • http://munnarinfo.in/userfiles/file/58818504486.pdfIn PDF document text
    • https://mps-india.com/userfiles/files/wexusinokexulux.pdfIn PDF document text
    • https://sasalidayanisma.org/uploads/file/12454001463.pdfIn PDF document text
    • http://srub-servis.ru/userfiles/file/gimebeferumofuxul.pdfIn PDF document text
    • https://jairdefreitas.com/ckfinder/userfiles/files/sumivesivorifa.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/PmAiG5ZyT-k/uplcv?utm_term=convertidor+de+unidades+para+androidPDF 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_off0000d671.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD671 18360 bytes
SHA-256: 8478c8bfad01c6356ca88dc046d8284087f20443cf25ac056bdaa2bcc0f50510
font_01_sfnt_off0001049e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1049E 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00011cb5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11CB5 10536 bytes
SHA-256: 816a9238ef5f4f77240c40fe5acf24079c70e784d07465087c5de8a97bfa2954

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