Malicious PDF — malware analysis report

Static analysis result for SHA-256 d1fe5bb902b05559…

MALICIOUS

PDF

81.5 KB Created: 2021-10-09 06:20:42 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-25
MD5: ebe2209b57ec002a6185580a41178167 SHA-1: 85eb38556cf56393ec269d44e4e239359ef5859d SHA-256: d1fe5bb902b05559cd0472385b81ab5785205a062f52ad8bb7cb2f5adfc9ff10
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains an embedded JavaScript stream and multiple external URIs, many of which are part of a link farm hosted on compromised or disposable domains. The primary lure appears to be 'minecraft free download android 2020', suggesting a phishing or malware distribution attempt. The ClamAV detection and ML classifier strongly indicate malicious intent, likely related to phishing or trojan distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9981

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • PDF link farm points to compromised-WordPress upload storage medium PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM
    PDF contains multiple clickable links, across many distinct hosts, whose targets are random-slug files parked in the upload directories of vulnerable WordPress form plugins (FormCraft, Super Forms). This is the hallmark of the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains hosted on compromised sites. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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://drafthe.ru/uplcv?utm_term=minecraft+free+download+android+2020 PDF link annotation
    • https://feniks9.ru/ckfinder/userfiles/files/mimizivimomarodejegadi.pdfIn PDF document text
    • https://funke.be/data/file/bisoturezelajotosojikize.pdfIn PDF document text
    • http://lucchetta.net/userfiles/files/39571846706.pdfIn PDF document text
    • http://tageedesign.com/ssmpt/documents/file/52046144435.pdfIn PDF document text
    • http://waxiangyuan.com/upload_fck/file/2021-9-7/20210907125616442720.pdfIn PDF document text
    • http://crimesla.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/xogebilopevunepesapidumov.pdfIn PDF document text
    • https://ht-cooling-j3t.com/contents/files/xomujobixasegukogomixow.pdfIn PDF document text
    • https://umartravel.com/files/lopogokobanagunelu.pdfIn PDF document text
    • https://granitnet.hu/editor_up/19112925332.pdfIn PDF document text
    • http://artmetinc.com/wp-content/plugins/formcraft/file-upload/server/content/files/1612ea5b0c439d---40652581817.pdfIn PDF document text
    • https://ladida.asia/sporlegen/administrator/imagetempfile/20447896807.pdfIn PDF document text
    • http://daieimotors.com/js/upload/files/43867803463.pdfIn PDF document text
    • https://impariant-club.ru/wp-content/plugins/super-forms/uploads/php/files/e7c302d31d13328d35a063f73086c095/xavujezes.pdfIn PDF document text
    • http://www.thunderesp.com/ckfinder/ckfinder.htmlfiles/losekabubutido.pdfIn PDF document text
    • http://slmj8.com/data/userfiles/files/38789978239.pdfIn PDF document text
    • https://www.adler-leitishofen.de/wp-content/plugins/formcraft/file-upload/server/content/files/1615fa2762cbee---kowipuwowabofopexa.pdfIn PDF document text
    • http://due.pt/js/ckfinder/userfiles/files/57611122288.pdfIn PDF document text
    • http://www.onlinenieuwsbriefversturen.nl/gebruikers/afbeeldingen/97158311062.pdfIn PDF document text
    • http://opuspointpartner.com/ckfinder/userfiles/files/fuxuvujugekajowug.pdfIn PDF document text
    • http://3t-t.com/User_File/UpFile/file/20210923165455_cG9ydXdha2U=.pdfIn PDF document text
    • http://le-lemniscus-incandescent.fr/ckeditor/upload/files/12274711758.pdfIn PDF document text
    • https://www.karavanlakesfet.com/wp-content/plugins/super-forms/uploads/php/files/36674de182d5e5dd1a2b840e0f508f9c/bagifigupax.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_off0000d924.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD924 18060 bytes
SHA-256: dbf617df39f4162bb1bd9a01e3913e2fa64a4b22410e49ec89adac2cb505b256
font_01_sfnt_off0001078f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1078F 10620 bytes
SHA-256: 05c69ff45826826d90682470aee8fa39624af83cf630954b078e606fe805633f
font_02_sfnt_off00012015.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12015 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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