Malicious PDF — malware analysis report

Static analysis result for SHA-256 007794136fe59638…

MALICIOUS

PDF

94.7 KB Created: 2021-09-14 00:33:01 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14
MD5: 8a419aa7cdfbbf1d0526735f4bf28722 SHA-1: 0e5cb18ee00e2a5eabaaa3e74fea036f31b036ee SHA-256: 007794136fe596388b77027e97a1d5158da3a653228fc36bddb1d1faf5f2dde6
156 Risk Score

Malware Insights

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

The PDF contains numerous links to external websites, many of which are hosted on disposable domains or compromised CMS upload storage, indicating a link farm designed to redirect users to malicious content. The ML classifier and ClamAV detection strongly suggest malicious intent, likely for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9969

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 http://jlsxjy.com/right/UploadFile/file///2021090610011473499.pdf In PDF document text
    • https://www.frontierexim.com/wp-content/plugins/super-forms/uploads/php/files/56c3ohkd9sdd89ekrg1p66j31e/91416787292.pdfIn PDF document text
    • http://jumpstart.mobi/ckfinder/userfiles/files/68685916358.pdfIn PDF document text
    • http://xn--90aoj0agf7cq.xn--p1ai/uploads/files/danubumimibalejusoz.pdfIn PDF document text
    • http://pascalparrot.com/uploads/assets/file/33091555077.pdfIn PDF document text
    • http://shesob.com/file/files/varitor.pdfIn PDF document text
    • http://jodhpurheritagewalk.com/images/file/84911937998.pdfIn PDF document text
    • https://www.karelo.com/uploads/File/lepuj.pdfIn PDF document text
    • http://www.skupp.pl/wp-content/plugins/formcraft/file-upload/server/content/files/161310e6dcecfc---94812536933.pdfIn PDF document text
    • https://htfcompact.com/wp-content/plugins/super-forms/uploads/php/files/1c07c1cf4f553c38156c485758f69ca7/15691963978.pdfIn PDF document text
    • https://www.generalutilities.com/wp-content/plugins/formcraft/file-upload/server/content/files/16137d17d74985---23223520665.pdfIn PDF document text
    • http://gaziogluenerji.com/images_upload/files/kogisizegulegamixet.pdfIn PDF document text
    • https://pielinks.com/UserFiles/file/96156521704.pdfIn PDF document text
    • http://nathulaldasptti.com/ckeditor/ckfinder/userfiles/files/96570761137.pdfIn PDF document text
    • http://yyfxsw.com/upload/files/keferekaz.pdfIn PDF document text
    • https://123kozijnofferte.nl/wp-content/plugins/super-forms/uploads/php/files/e76e5e9876cb26287e3c857a40435f73/panevigufarusotozaxeti.pdfIn PDF document text
    • http://xn--djr00fsyfv0o5qgy9u.com/filespath/files/20210913013138.pdfIn PDF document text
    • http://telegid.tv/userfiles/files/69945148627.pdfIn PDF document text
    • https://nusbetaja2.com/contents/files/94400740500.pdfIn PDF document text
    • https://okazionche.com/files/dilubutobitonadoxerefi.pdfIn PDF document text
    • https://zagorjeadventureteam.hr/files/48838162782.pdfIn PDF document text
    • http://alicekhenrylawoffice.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/dolozepup.pdfIn PDF document text
    • https://kebecelectrique.com/upload/editor/file/fowovezofoxafakunizajig.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/S30rS-6n6vg/uplcv?utm_term=all+about+asset+allocation+pdfPDF 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_off00010e9f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10E9F 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off000126b6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x126B6 10732 bytes
SHA-256: 24f8f6c6091c47775dfb4c4837420520ba20b6f5699e38fa61c78e45db131e49
font_02_sfnt_off00013f49.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13F49 17680 bytes
SHA-256: 423c2d64f340a37796a3f62f65182b57b023dca78a61f825292e5114bebba1e3

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