Malicious PDF — malware analysis report

Static analysis result for SHA-256 d365dc5c7e8d9bc7…

MALICIOUS

PDF

81.8 KB Created: 2021-09-01 04:19:27 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26
MD5: b0a3c7f94170ea7600ba6e93ebb1b3f4 SHA-1: 620d9b210d525705e545e5a5b3c0462350581c92 SHA-256: d365dc5c7e8d9bc7ed65cd1aed192b7f23c9654138f40c0c3849f33295db99aa
156 Risk Score

Malware Insights

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

The file was detected by ClamAV as Pdf.Phishing.Trojan and flagged by an ML classifier, indicating malicious intent. It contains a link farm with numerous URLs pointing to potentially compromised CMS uploads, suggesting a phishing or malware distribution lure. Although no scripts were explicitly extracted, the PDF structure and embedded URLs are indicative of a malicious document designed to redirect users to harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

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
  • 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://michaels-limo.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c3cbf6e960e---buwat.pdf In PDF document text
    • https://abeess.com/userfiles/file/63085346187.pdfIn PDF document text
    • http://kozelsk-adm.ru/files/uploads/files/pupokoxifumuba.pdfIn PDF document text
    • http://sportsgarten.com/editorData/file/55337993521.pdfIn PDF document text
    • https://ilc.ua/wp-content/plugins/super-forms/uploads/php/files/rv35pvr85hcbnms4i5v4km5m12/98183234393.pdfIn PDF document text
    • https://webbsoil.com/home/webb/public_html/ckfinder/userfiles/files/nizoxufiperabe.pdfIn PDF document text
    • https://tcufroghouses.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a406514b48c---44319744579.pdfIn PDF document text
    • http://smsalumni1971.com/apadmin/uploads/userfiles/files/31560268240.pdfIn PDF document text
    • http://epicridesnepal.com/files/boxavowekexivo.pdfIn PDF document text
    • http://tmkb.org.tr/ckfinder/userfiles/files/gazukevideri.pdfIn PDF document text
    • https://www.hinogas.com/wp-content/plugins/super-forms/uploads/php/files/ohgn94sarlc5l1plbcma0jolso/28338412455.pdfIn PDF document text
    • https://miaousland.fr/ckfinder/userfiles/files/47464459640.pdfIn PDF document text
    • https://monyetjoget.com/contents//files/zisetozuleduxot.pdfIn PDF document text
    • http://vector-food.pl/userfiles/file/74480917702.pdfIn PDF document text
    • http://waypl.pl/upload/File/44107332512.pdfIn PDF document text
    • https://www.energetisch-therapeut-estie.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160bbd61c6248c---lanobuz.pdfIn PDF document text
    • https://vico-real-estate.com/ckfinder/userfiles/files/52019505210.pdfIn PDF document text
    • https://bachson.net/upload/file/numonakuzawexitu.pdfIn PDF document text
    • https://loskutova.site/wp-content/plugins/super-forms/uploads/php/files/85447108c83f5a939ab04cf72cc39742/fepizogimotujejasawexu.pdfIn PDF document text
    • http://vietsonplastic.com/uploads/userfiles/file/suxifabimonirikuzep.pdfIn PDF document text
    • https://nhahangphongcanh.com/uploads/files/gumodo.pdfIn PDF document text
    • https://www.fifatravels.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bb408470b2a---22162275191.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/1xuhb7AK25c/uplcv?utm_term=guess+the+football+playerPDF 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_off0000dd1e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDD1E 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000f530.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF530 16724 bytes
SHA-256: a772ac1463f6f46e9e50d087b1291eaf785d9810054d6c51589d001723cc0ccb
font_02_sfnt_off0001205d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1205D 10652 bytes
SHA-256: 197a775119623f4c3b883cb6e323d07a412e67461f6ae096c0460d5f7b17d7ab

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