Malicious PDF — malware analysis report

Static analysis result for SHA-256 07c7b1426b728439…

MALICIOUS

PDF

79.8 KB Created: 2021-09-06 05:09:48 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23
MD5: ea49732cc88efe8e60944bce43ec542e SHA-1: 42291d95c539ee73709951a17abce895fd4a7b6b SHA-256: 07c7b1426b7284397a03e85429b69a6e6c4f1f074160d4279da402ce0ac9a9b0
156 Risk Score

Malware Insights

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

The sample was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains numerous embedded URLs, many of which point to potentially compromised WordPress upload directories or disposable hosting, forming a link farm. The primary purpose appears to be redirecting users through these links, likely to phishing sites or to download further malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9917

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://medsplus.us/admin/images/file/sisefetiwop.pdf In PDF document text
    • http://giasuminhtam.com/Images_upload/files/76821310815.pdfIn PDF document text
    • http://dichvugiayphep.net/hinhanh_fckeditor/file/kifuwujabomileri.pdfIn PDF document text
    • https://phoenixknights.co.uk/wp-content/plugins/super-forms/uploads/php/files/4e46a2d431c23db10e2f7df9b9be4142/pozulezif.pdfIn PDF document text
    • https://communeouchamps.fr/userfiles/file/67512810527.pdfIn PDF document text
    • http://studiofagiani.eu/userfiles/files/59974909241.pdfIn PDF document text
    • http://for-rent-leuven.com/wp-content/plugins/formcraft/file-upload/server/content/files/160872308b3a6b---mefozinuxo.pdfIn PDF document text
    • http://cgt-fo-csc.fr/wp-content/plugins/formcraft/file-upload/server/content/files/160770f1a48a46---32180632473.pdfIn PDF document text
    • https://krimgranit.ru/wp-content/plugins/super-forms/uploads/php/files/bef8f46d6337149e13861cd54f0f2f6b/nopekabupawapasakasojebo.pdfIn PDF document text
    • http://www.olympussverige.se/wp-content/plugins/super-forms/uploads/php/files/0e0idl3mdgjc38rtu0ts6vd666/vimudol.pdfIn PDF document text
    • http://beateromer.com/bilder/file/xupavakogabum.pdfIn PDF document text
    • http://coeb.eu/userfiles/files/ragabidimegepizotosipu.pdfIn PDF document text
    • http://sushi-belovo.ru/files/suvujamop.pdfIn PDF document text
    • http://driscollandgibson.com/images/edit_images/file/39372897623.pdfIn PDF document text
    • http://kvbm.org/pds/userfiles/files/rejokog.pdfIn PDF document text
    • https://www.arphplumbing.co.uk/wp-content/plugins/super-forms/uploads/php/files/ok0ha8ni8n8tv7rdpcbs2u33mt/vadofebolixalo.pdfIn PDF document text
    • https://machnik.net/ckfinder/userfiles/files/76780876568.pdfIn PDF document text
    • https://www.hotel-palladium.gr/wp-content/plugins/super-forms/uploads/php/files/s8vtfecvei8abgoevujtcqniko/13713261113.pdfIn PDF document text
    • http://ardechetendancebrut.fr/userfiles/ardechetendancebrut.fr/file/dufigebu.pdfIn PDF document text
    • https://neoville.ru/wp-content/plugins/super-forms/uploads/php/files/80f917aeec636403aa469e5cb4ad1d77/65730632847.pdfIn PDF document text
    • https://ankaratemizlikcim.com/depo/sayfaresim/file/10228633563.pdfIn PDF document text
    • http://www.asejnrtigers.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160c08f9620b20---23416321341.pdfIn PDF document text
    • http://yearbookplus.com/uploads/ckfinder/files/63457426649.pdfIn PDF document text
    • https://oriental-kitchens.com/userfiles/files/baripefupofusivorepojizog.pdfIn PDF document text
    • https://klingende-zeder.de/wp-content/plugins/formcraft/file-upload/server/content/files/160b6e60eee605---33655259472.pdfIn PDF document text
    • http://www.sunarozlem.com.tr/wp-content/plugins/super-forms/uploads/php/files/6tj96l0bcv097qh9ksshlqkso3/66017330949.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/DOqCt-cVA4I/uplcv?utm_term=suzuki+ertiga+gl+manual+2017PDF 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_off0000d13e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD13E 10832 bytes
SHA-256: ba29e90106d1211dd1a3df55bc9650c5654cc09bb636d713ddc1435e6e62290f
font_01_sfnt_off0000ea71.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEA71 17900 bytes
SHA-256: 6ea8ea22fb61ce8d994736b98940429c157e0ebf7433343680ca751ecac6d92b
font_02_sfnt_off000118cd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x118CD 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

Open this report in the interactive analyzer, or submit your own file for analysis.