Malicious PDF — malware analysis report

Static analysis result for SHA-256 90648cd4ed98747e…

MALICIOUS

PDF

69.8 KB Created: 2021-09-27 03:46:01 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26
MD5: e6e14a5675f5be2bf499a4a7522203b1 SHA-1: 43618c0da14c1f07344b7ed766ef30e11f4d3585 SHA-256: 90648cd4ed98747e06407ed57b9fa27ad2050da3a8e32f33e12b3d6f219fcd4f
156 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ClamAV and an ML classifier. It contains numerous links to compromised websites, many of which host further PDF files. One URL specifically mentions 'download game oddworld stranger's wrath mod apk', suggesting a lure to download potentially malicious game-related content. The presence of embedded JavaScript, though not explicitly detailed, is a common vector for exploiting PDF vulnerabilities or redirecting users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9982

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
  • 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.
  • 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://alcc.vn/wp-content/plugins/super-forms/uploads/php/files/r7i93dd188j7cf136fg5pc01q7/82674478143.pdf In PDF document text
    • http://innersolutions-uk.com/file/jidamaga.pdfIn PDF document text
    • https://aartipalette.com/userfiles/file/51959744499.pdfIn PDF document text
    • http://lawyermo.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/38267400420.pdfIn PDF document text
    • http://luxmeterthai.com/ckfinder/userfiles/files/mulepifuvinelosisise.pdfIn PDF document text
    • http://www.scenekunstskolen-efteruddannelsen.dk/ckfinder/userfiles/files/mepavot.pdfIn PDF document text
    • http://ljhalls.com/wp-content/plugins/super-forms/uploads/php/files/34861ba788533e28cee460232d35de13/vodexuluw.pdfIn PDF document text
    • http://www.hz-kontejnery.cz/ckfinder/userfiles/files/82356484263.pdfIn PDF document text
    • http://knuhpharm.kr/userfiles/file/20210916231027.pdfIn PDF document text
    • http://ciaomamma.hu/editor_up/67349982293.pdfIn PDF document text
    • https://path.mn/userfiles/files/37127818596.pdfIn PDF document text
    • http://www.ville-dammarie.com/ckfinder/userfiles/files/gabejogaxerewibigiwibuluk.pdfIn PDF document text
    • http://bsa-billiard.by/images_from_html_editor/file/51559187735.pdfIn PDF document text
    • https://andymullinscommercial.com/home/andy/public_html/ckfinder/userfiles/files/23203956566.pdfIn PDF document text
    • http://suportti.com/wp-content/plugins/formcraft/file-upload/server/content/files/16134b910cf902---ganurivomoragebujanoz.pdfIn PDF document text
    • http://dwallacelaw.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/mesevefarolefujikodi.pdfIn PDF document text
    • https://pvcmikser.com/upload/files/69697813875.pdfIn PDF document text
    • http://de.ruben.pl/ckfinder/userfiles/files/55663402194.pdfIn PDF document text
    • https://evocative.ru/wp-content/plugins/formcraft/file-upload/server/content/files/1612eb6c0ad404---98374874992.pdfIn PDF document text
    • http://alkanboya.com/files/file///46526927843.pdfIn PDF document text
    • http://minhnguyenvn.com/uploads/userfiles/file/84368662599.pdfIn PDF document text
    • http://zwickerfoto.hu/_user/file/kexudokunogimowediko.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/S30rS-6n6vg/uplcv?utm_term=download+game+oddworld+stranger%27s+wrath+mod+apkPDF 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_off0000b081.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB081 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000c893.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC893 15052 bytes
SHA-256: 8001acece89189b930359e2067f7760284dfa8925b43a4caf4b3de27621d820a
font_02_sfnt_off0000ee42.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEE42 10960 bytes
SHA-256: aa213cac8493e13d47ffb2898b3227cd540fe6d3e0f76bc00a57f2d86f8c78db

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