Malicious PDF — malware analysis report

Static analysis result for SHA-256 078374eeccc125cf…

MALICIOUS

PDF

81.0 KB Created: 2021-07-28 10:20:38 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: e6887f3ed0eac014a8dbaecda84f7228 SHA-1: 61ed711ec677dec7b64de9da9ae6f2517808f3df SHA-256: 078374eeccc125cf30415c613220ad6710d2fd898af909f7dc5121932a6598b7
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous links, many pointing to compromised WordPress sites and disposable domains, indicating a link farm designed to redirect users. The ClamAV detection and ML classifier strongly suggest malicious intent, likely phishing or malware distribution. While no scripts were explicitly extracted, the PDF structure and embedded URLs are indicative of a malicious document, potentially leveraging embedded JavaScript for further actions.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9975

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://www.arc-welding.co.uk/wp-content/plugins/super-forms/uploads/php/files/1eih376aqddo9jj0fs5m1s75c2/gokavokogewukuzanimu.pdf In PDF document text
    • https://www.straightmyteeth.com/wp-content/plugins/super-forms/uploads/php/files/923f73840cc7de6c43a1e00b78f9042b/jokopidutamep.pdfIn PDF document text
    • http://inewbus.com/wp-content/plugins/super-forms/uploads/php/files/9ldragkr0hoq3m0jcj2vrbsjd1/rujes.pdfIn PDF document text
    • https://nam.it/wp-content/plugins/formcraft/file-upload/server/content/files/160fc73b5c9c59---85228290934.pdfIn PDF document text
    • http://www.petersmetalstitching.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/160bad9804522c---deroner.pdfIn PDF document text
    • https://www.energetisch-therapeut-estie.nl/wp-content/plugins/formcraft/file-upload/server/content/files/16084f6c93e8e8---livajov.pdfIn PDF document text
    • https://yidinfo.net/wp-content/plugins/super-forms/uploads/php/files/shk908nrr1sma369v83alqciou/paberumasorepageguvukor.pdfIn PDF document text
    • https://yziact.fr/wp-content/plugins/super-forms/uploads/php/files/0v3o1p61ujca2j2jcljreu23s2/88206664952.pdfIn PDF document text
    • http://kaufdeinauto.de/wp-content/plugins/formcraft/file-upload/server/content/files/1609de6ecc322f---30973600323.pdfIn PDF document text
    • https://www.web2business.pt/wp-content/plugins/formcraft/file-upload/server/content/files/1607e6e9927206---kazuzimab.pdfIn PDF document text
    • http://cnp-inc.com/ckupload/files/fuxufowo.pdfIn PDF document text
    • http://havefuntogether.com/image/upload/File/wiwosumixekimi.pdfIn PDF document text
    • http://www.hptindia.com/wp-content/plugins/formcraft/file-upload/server/content/files/16089e57c87d6b---44689091535.pdfIn PDF document text
    • https://aihr-iadh.org/uploads/FCK_files/file/bikiserufozetiguzudigiwos.pdfIn PDF document text
    • https://paloaltospeakerseries.com/wp-content/plugins/super-forms/uploads/php/files/f8d20f2d559fb4bf5c4b4398911622d2/wadozamagaw.pdfIn PDF document text
    • https://www.westcountrystoves.co.uk/wp-content/plugins/super-forms/uploads/php/files/6b2b7f601bcaf95cfb7414b8078c665f/polerejimuxitoril.pdfIn PDF document text
    • http://suarezbeltran.com/aym_images/files/13332528588.pdfIn PDF document text
    • http://nhatminhtrading.vn/app/webroot/uploads/files/91140666680.pdfIn PDF document text
    • https://hankilfood.com/upfile/files/siwizekuvumikezos.pdfIn PDF document text
    • http://tea-ra.com/user_data/upload/save_image/files/77058118635.pdfIn PDF document text
    • http://recamonde.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1609ecd2860d9a---lisuravizexakoxokufijav.pdfIn PDF document text
    • http://adance0112.com/upfile/editor/file/64617347333.pdfIn PDF document text
    • http://rainbowcaterers.in/userfiles/file/resiwevaxo.pdfIn PDF document text
    • https://hanahana.vn/media/ftp/file/57876647626.pdfIn PDF document text
    • http://caratow.eu/userfiles/file/lojutis.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/PmAiG5ZyT-k/uplcv?utm_term=j%27ai+saign%C3%A9+blaise+cendrars+texte+int%C3%A9gral+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_off0000d54c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD54C 17956 bytes
SHA-256: 801ca93ca63377906a7d6ba73efb71bbed2c1e109da70dd4d27de1b0f1c0f2e7
font_01_sfnt_off0001022d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1022D 11096 bytes
SHA-256: 5dbd094f356511c7b8dfab6849e61915c9ede3dab6df79d5b6c5b21e6f763be0
font_02_sfnt_off00011b85.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11B85 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1