Malicious PDF — malware analysis report

Static analysis result for SHA-256 064efd78b2a2f97d…

MALICIOUS

PDF

82.4 KB Created: 2021-09-12 19:07:31 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26
MD5: 889bd83214498837824b1fcf6f00bc9c SHA-1: 9231a3a63cd6aa1320c70f575366218294310583 SHA-256: 064efd78b2a2f97d6710ca7854bff8985561ba3caca87768aa52f262dbec8898
184 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The file contains numerous external URIs, many pointing to compromised CMS upload storage and disposable hosting, suggesting it is part of a link farm designed to redirect users to malicious content. The presence of a 'download button' heuristic further supports the phishing or malware distribution lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9951

Heuristics 8

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • Clickable URI points to raw IP address medium PDF_URI_IP_LITERAL
    PDF contains a clickable HTTP(S) action whose host is a literal IPv4 address. Legitimate documents normally link to named domains; raw-IP destinations are common in disposable phishing and malware-delivery infrastructure.
  • 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.
  • 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://ketchas.ru/uplcv?utm_term=naruto+vs+bleach+mod+apk PDF link annotation
    • http://snp-ent.com/files/fckeditor/file/909043246139c39b79183.pdfIn PDF document text
    • https://consultemergingmarkets.cubsindia.com/files/36296466144.pdfIn PDF document text
    • https://www.cukoyem.com.tr/wp-content/plugins/super-forms/uploads/php/files/mv91s2c9gvn2g9muakhke06ma4/nawiludizijedadutos.pdfIn PDF document text
    • http://178.62.148.222:300/ckeditor/ckfinder/userfiles/files/14481677635.pdfPDF link annotation
    • http://opuspointpartners.com/ckfinder/userfiles/files/tosikoludupizopoxapajetol.pdfIn PDF document text
    • http://www.hptindia.com/wp-content/plugins/formcraft/file-upload/server/content/files/16135d66e9bf11---19617053964.pdfIn PDF document text
    • http://elma-itc.ru/!upload/files/bugove.pdfIn PDF document text
    • http://www.jindatunnel.com/up_files/file/pixuvolas.pdfIn PDF document text
    • https://www.huaikrachaohospital.go.th/assets/global/lib/ckfinder/userfiles/files/tojufiwivaparanopopek.pdfIn PDF document text
    • https://www.rath-catering.de/wp-content/plugins/formcraft/file-upload/server/content/files/161369b99f1626---41552103847.pdfIn PDF document text
    • http://gmart-express.com/demo/uploadpic/file/97058784135.pdfIn PDF document text
    • http://aeronautike.com/userfiles/file/fivegironover.pdfIn PDF document text
    • https://ceylanotel.com/firma/files/27830487915.pdfIn PDF document text
    • http://www.jobsincrete.gr/images/_user_na/file/72544879795.pdfIn PDF document text
    • http://asid.rw/userfiles/file/zepuzifesepife.pdfIn PDF document text
    • https://ikincielinmak.com/upload/ckfinder/files/17881871873.pdfIn PDF document text
    • http://alacarte-grafik.de/userfiles/file/peweke.pdfIn PDF document text
    • http://aloeverajuice.cz/files/file/27393586708.pdfIn PDF document text
    • https://123kozijnofferte.nl/wp-content/plugins/super-forms/uploads/php/files/140101ca77de1bd1462374310433fad0/zonigidagusuxofotixoz.pdfIn PDF document text
    • http://nedirajtebosnu.net/userfiles/file/lugivalifobakima.pdfIn PDF document text
    • http://flamefitnessstudio.com/cewit/images/file/76641591184.pdfIn PDF document text
    • https://rosebankprimary.co.za/inc/ckfinder/userfiles/files/90998219722.pdfIn PDF document text
    • https://bitree.ru/ckfinder/userfiles/files/nuvonodulakagevurekeva.pdfIn PDF document text
    • https://medsplus.us/admin/images/file/gikevog.pdfIn PDF document text
    • https://ozora.schaffsen.com/contents/file/24503126831.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_off0000d957.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD957 19000 bytes
SHA-256: daf0353e1c406f22055c7fa3efd7daec05acdbcf406cfbc891f0f2b583b65438
font_01_sfnt_off00010aac.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10AAC 10956 bytes
SHA-256: 2aaa4a30170fdad8c340beb16f9585ba1fde7a84d80a949e33f8dd9d3d37ef8b
font_02_sfnt_off000123fe.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x123FE 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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