Malicious PDF — malware analysis report

Static analysis result for SHA-256 d0e7fe015aa0cea1…

MALICIOUS

PDF

81.1 KB Created: 2021-08-15 18:49:06 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23
MD5: 483f564f22ceb171b5bd20917f859780 SHA-1: ae5cdca6caa2ad7be794ddf079caa45e432c2a8b SHA-256: d0e7fe015aa0cea12500341f69a95782466638c9fbab6097f734e68c053e4777
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The file is identified as malicious by ML classifiers and ClamAV, specifically as a 'Pdf.Phishing.Trojan'. It contains numerous links pointing to compromised CMS upload storage and disposable hosting, indicating a link farm designed to redirect users. The PDF's structure and embedded links suggest it's part of a phishing campaign or a distribution point for further malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9949

Heuristics 7

  • 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.
  • Urgency / deadline lure low SE_URGENCY_LURE
    Document contains urgency or deadline language ('account will be terminated', 'action required within 24 hours', etc.) — useful context, but low-signal without other findings
  • 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://adirondackseafood.com/ckfinder/userfiles/files/47325608764.pdf In PDF document text
    • https://hightechrustremovers.nl/wp-content/plugins/formcraft/file-upload/server/content/files/16071d063a7cff---zaranuviw.pdfIn PDF document text
    • https://totalyoumovement.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ae0028a4dbe---nigopirevik.pdfIn PDF document text
    • https://valenciamaids.com/userfiles/files/zitoritosujariziminibewow.pdfIn PDF document text
    • https://cashmeredreams.com/wp-content/plugins/super-forms/uploads/php/files/d83c365b972d394b6c520e34b626371e/jotogazinovojavilo.pdfIn PDF document text
    • https://studiogreenwich.ru/wp-content/plugins/super-forms/uploads/php/files/9eee3bf0b8832942808aeced2a3afcfc/2239132738.pdfIn PDF document text
    • http://kagoshimakojintaxi.com/userfiles/file/sijanidizevemusuf.pdfIn PDF document text
    • http://hondaototanan.com/upload/files/65788122955.pdfIn PDF document text
    • http://ediliziaunoaventi.com/userfiles/files/muxurukuw.pdfIn PDF document text
    • https://jclifeschools.org/wp-content/plugins/super-forms/uploads/php/files/b111097c0197f8d2a4692a77e16f3716/lizozevoloxogoxi.pdfIn PDF document text
    • https://microfocus-realize2020mea.com/wp-content/plugins/super-forms/uploads/php/files/d5fb565e1dd2d3eb0f82ebddbb750afd/42344123739.pdfIn PDF document text
    • http://ducthanhtam.com/uploads/userfiles/file/pusidud.pdfIn PDF document text
    • https://ikitellirezistans.com/upload/files/41297693011.pdfIn PDF document text
    • http://rexant.by/upload/editor/files/remufuvub.pdfIn PDF document text
    • http://www.peplex.it/wp-content/plugins/formcraft/file-upload/server/content/files/160cc3d399f787---28509797432.pdfIn PDF document text
    • https://agenciaboom.com/wp-content/plugins/super-forms/uploads/php/files/mjngvivfl91fcfl1stqnhmj7j3/nagenekanip.pdfIn PDF document text
    • http://jrpst.pl/userfiles/file/83981698837.pdfIn PDF document text
    • https://onlinendttraining.com/files/domevewa.pdfIn PDF document text
    • https://daleplumbinginc.com/wp-content/plugins/super-forms/uploads/php/files/b312fa8b76ab409dedc998a34c20aa57/tunokoxoxogamovimaneto.pdfIn PDF document text
    • https://www.physioaktivkramer.de/wp-content/plugins/formcraft/file-upload/server/content/files/1606cdcd475939---bodafarorojukumejebutas.pdfIn PDF document text
    • http://slowjamsundays.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a5d42581faf---97644129917.pdfIn PDF document text
    • https://backcountryplayground.com/wp-content/plugins/super-forms/uploads/php/files/8d0d8f4b2b6926332d475ae75e2bf1f1/98507908999.pdfIn PDF document text
    • https://asiatravel.kg/wp-content/plugins/super-forms/uploads/php/files/0fe3941c2d0d013f5e1e26e1409a4f7e/rebojivija.pdfIn PDF document text
    • https://www.webhisto.com.tr/wp-content/plugins/formcraft/file-upload/server/content/files/161060a4894b10---jijerubewokatoje.pdfIn PDF document text
    • http://solyaris.pro/admin/ckfinder/userfiles/files/rajezegoburalumuseroduw.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/3CAf4wW3hvY/uplcv?utm_term=nice+guidelines+for+refeeding+syndromePDF 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_off0000d2e3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD2E3 10748 bytes
SHA-256: 9a89400445ab322ab591c8d57b2c3781df4468845dc14223f5058e83f6119284
font_01_sfnt_off0000eb5f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEB5F 19896 bytes
SHA-256: 8ebd5568d2da75318965f6974e6517eecec00ab12028d503e04a4f42adf3c9b6
font_02_sfnt_off00011eab.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11EAB 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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