Malicious PDF — malware analysis report

Static analysis result for SHA-256 59fe69de667f268e…

MALICIOUS

PDF

77.0 KB Created: 2021-09-14 15:53:36 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: b249b5a72babb05784c17a8440893f98 SHA-1: 5088a353ad56b3201ef26dc749ca920d7f18b24d SHA-256: 59fe69de667f268ee0fe9d692ac3fbff6b02faa31918d1aa3de6b93c1a8eda8a
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous external links, many pointing to compromised WordPress sites and disposable hosting, suggesting a link farm designed to redirect users. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or distributing further malware. Although no scripts were explicitly extracted, the PDF structure and URL patterns are consistent with malicious document lures.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9976

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://garglob.ru/uplcv?utm_term=word+that+start+with+d+and+end+with+k PDF link annotation
    • https://www.golaw.net/wp-content/plugins/formcraft/file-upload/server/content/files/1612eb8b749852---65234856349.pdfIn PDF document text
    • http://besteva.com/upload/files/lerovuzejizufimununopev.pdfIn PDF document text
    • https://www.sahabatkeluargahomecare.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613387ca0b698---99314785190.pdfIn PDF document text
    • https://meesens.be/KrMee/Tekstverwerker/47572082795.pdfIn PDF document text
    • http://antitumor.org/filespath/files/20210903004915.pdfIn PDF document text
    • http://www.predoisiasociatii.ro/wp-content/plugins/formcraft/file-upload/server/content/files/1613b899ca653f---83871227872.pdfIn PDF document text
    • http://music-saikung.com/ckfinder/userfiles/files/65265564231.pdfIn PDF document text
    • http://bedrucken24.de/userfiles/file/99127861275.pdfIn PDF document text
    • https://best-of-geldanlagen.de/userfiles/file/60501595552.pdfIn PDF document text
    • http://zamdq.com/filespath/files/20210908140717.pdfIn PDF document text
    • http://jinyezi.cn/upload/bakogejimovedep.pdfIn PDF document text
    • https://ateneoarbonaida.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613327bfeefd3---72136554053.pdfIn PDF document text
    • http://lycee-elm.org/userfiles/file/36741159751.pdfIn PDF document text
    • http://pretaporter-pegah.com/userfiles/file/diwadepawu.pdfIn PDF document text
    • https://kermoulin.com/userfiles/file/moxotimoxanipumujobigur.pdfIn PDF document text
    • http://vankouwenenmastop.nl/UserFiles/file/55559648179.pdfIn PDF document text
    • https://principesgs.com/userfiles/file/53711810218.pdfIn PDF document text
    • http://mardeestilos.es/fotos/file/kisuz.pdfIn PDF document text
    • https://www.peltonfell.org.uk/ckfinder/userfiles/files/legudufer.pdfIn PDF document text
    • https://medsplus.us/admin/images/file/wujaxofisetolawelew.pdfIn PDF document text
    • http://global-poseg.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613eef185da0c---dizenidani.pdfIn PDF document text
    • http://longruiglass.com/ckfinder/userfiles/files/20210903_042715.pdfIn PDF document text
    • https://masterok-kovka.ru/wp-content/plugins/super-forms/uploads/php/files/60185a0703283a1a90853c4ea38541c0/72372308539.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_off0000c92a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC92A 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000e141.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE141 10468 bytes
SHA-256: 752462fbd9e66b8169827b415006ad83ef1bc8a45075e0111d737f6959d9edc7
font_02_sfnt_off0000f90d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF90D 17392 bytes
SHA-256: 54652d77a7f614f6205f6bd86d86347403c6299f9fc8e20a9c4d70191f216c23

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