Malicious PDF — malware analysis report

Static analysis result for SHA-256 5030eeac334596b2…

MALICIOUS

PDF

69.1 KB Created: 2021-09-24 20:53:29 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26
MD5: a17fdddcec5715ad33ee8521701d867b SHA-1: 3009785c7f49401285415b695cce36d9db99e9bb SHA-256: 5030eeac334596b241ebccde02e691fb026fe12bc5f12fadbd341536d8de28fe
134 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The sample was detected as malicious by ClamAV and an ML classifier, and it contains embedded JavaScript. The JavaScript likely facilitates the redirection to external URLs, as indicated by the PDF_URI and PDF_SEO_DISPOSABLE_LINK_FARM heuristics. These external links are likely part of a phishing or malware distribution scheme.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9956

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://jl-vacuum.com/upload/files/mekilepuzuse.pdf In PDF document text
    • http://apothepharma.com/upload/files/digewab.pdfIn PDF document text
    • https://estduquebec.com/scripts/php/xenocode/lib/ckfinder/userfiles/files/katevapudasa.pdfIn PDF document text
    • http://yuanda-boiler.com/d/files/41315874083.pdfIn PDF document text
    • https://medsplus.us/admin/images/file/92786293413.pdfIn PDF document text
    • http://podushka.by/files/files/ragudiju.pdfIn PDF document text
    • http://stroytehcentr.ru/images/file/rebesosesifunedekow.pdfIn PDF document text
    • http://www.mearesandassociatesllc.com/siteuploads/editorimg/file/lunizuwoperanemoso.pdfIn PDF document text
    • http://studioferrato.it/userfiles/files/62557665011.pdfIn PDF document text
    • http://www.morrisjones.co.uk/EditorImages/file/wipadaxagivibo.pdfIn PDF document text
    • http://appextskihjthj.handysociality.com/upload/files/4417075749.pdfIn PDF document text
    • https://bakwanudang.com/contents/files/wulikoli.pdfIn PDF document text
    • http://www.optionassurance.ca/wp-content/plugins/formcraft/file-upload/server/content/files/16145e08bcaed6---56847386136.pdfIn PDF document text
    • http://shannonlakeestates.org/fck_images/file/26007601383.pdfIn PDF document text
    • http://newtrichur.com/userfiles/file/30657794341.pdfIn PDF document text
    • http://stsmcc.org/www/js/ckfinder/userfiles/files/7095731180.pdfIn PDF document text
    • https://rh-h1tapi-turbo.com/contents/files/83501303862.pdfIn PDF document text
    • http://perchegouet.com/ckfinder/userfiles/files/77326982147.pdfIn PDF document text
    • http://boden.boj.se/uploads/userfiles/files/bononivagoxesaxuwu.pdfIn PDF document text
    • https://losaltos.com/wysiwygfiles/file/70137836595.pdfIn PDF document text
    • https://phucatgarment.com.vn/ckfinder/userfiles/files/81700323550.pdfIn PDF document text
    • https://podereilmontaleo.it/writable/public/userfiles/file/fikozilowajenasutu.pdfIn PDF document text
    • http://hai-bi.com/uploads/files/202109021428384448.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/zMnd8XtcwSM/uplcv?utm_term=iphone+6+mobile+price+in+bangladeshPDF 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_off0000ae58.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xAE58 11120 bytes
SHA-256: 2ccc41f55f253817496e442685f8c97b683e7f925a16a5ae98e2d1f61a397a3c
font_01_sfnt_off0000c795.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC795 15684 bytes
SHA-256: 19a849bfbf1f5821cd77a9383770932ee38afb5e4b9569fc917737399040841c
font_02_sfnt_off0000eedb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEEDB 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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