Malicious PDF — malware analysis report

Static analysis result for SHA-256 02b1a77796a7d4cc…

MALICIOUS

PDF

85.8 KB Created: 2021-07-05 05:47:07 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 24ef20467dde9d0dff4a488c01f23c85 SHA-1: 51dfada251198da6629c1abe218b1db6d1418144 SHA-256: 02b1a77796a7d4cc560cbabce0c819638773ce7aebcc86b45c4f9b1dd65e3893
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous links pointing to compromised WordPress sites, suggesting a link farm designed to host and distribute malicious files. The ClamAV detection and ML classifier strongly indicate malicious intent, likely phishing or malware delivery. No scripts were extracted, but the PDF structure and URL patterns are indicative of a phishing lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9947

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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://kaplanpm.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c1cb6c198e9---30245086400.pdf
    • https://avantkart.com/wp-content/plugins/super-forms/uploads/php/files/20ljsifqm1cupbn8pvch1d2c6h/71520625291.pdf
    • https://www.sodigital.it/wp-content/plugins/formcraft/file-upload/server/content/files/160a6850f7ad56---43761593018.pdf
    • https://bechtoldpaving.com/wp-content/plugins/super-forms/uploads/php/files/15604c9c03c3584e56dc8f8132f7fa0e/kujasapurazowalaf.pdf
    • http://baraanduliaptti.org/userfiles/file/14920196649.pdf
    • https://relleno-acidohialuronico.com/wp-content/plugins/super-forms/uploads/php/files/ba6df3ef84e9d75d450f54ba2b27baf9/jarilavezosaxepel.pdf
    • https://fishboat.hr/files/vepuriwevi.pdf
    • http://bezpieczna-strefa.pl/wp-content/plugins/super-forms/uploads/php/files/a7dfab3b9bbbd4a07cc9b10a4ced44ea/78346934773.pdf
    • http://akcjonariusz.com/UserFiles/file/93527834880.pdf
    • https://classicandcamper.co.uk/wp-content/plugins/super-forms/uploads/php/files/66m28m5snco1k88v23qgdifsfv/xumuzodokajajazu.pdf
    • http://www.expertnutritionadvisor.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b4133fc054c---50787586561.pdf
    • http://weiken-rc.com/upload/files/93848185943.pdf
    • https://szekszardportal.hu/userfiles/file/4576486124.pdf
    • https://artasedanasingaraja.com/uploadfck/file/78326936257.pdf
    • http://perilatomsk.ru/ckfinder/userfiles/files/30954076946.pdf
    • https://winston-woodward.com/wp-content/plugins/super-forms/uploads/php/files/862ad63f1b8ce99225872397fa999c04/fororoxafebuwojokupukerif.pdf
    • http://inewbus.com/wp-content/plugins/super-forms/uploads/php/files/dheeoq7m1632cgo1vnb4gp9r20/39014193131.pdf
    • https://calldidocta.com/wp-content/plugins/super-forms/uploads/php/files/8b22c85efa03cd9709b4597a6e73c90f/47954405970.pdf
    • http://nsk-nalogov.net/upload/files/darisepaduzuwig.pdf
    • https://www.apollopowersystems.com/wp-content/plugins/super-forms/uploads/php/files/200b011387adb942f06558e4dc52884a/gizivivizutixasabixog.pdf
    • https://tenekedjieva.com/uploads/file/16004913044.pdf
    • http://recamonde.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1609c60a161a17---nivikonuti.pdf
    • https://jodhpurtravels.com/nbloom/fckuploads/file/95215247438.pdf
    • https://feedproxy.google.com/~r/skout/mBVl/~3/fzgW7-mxBc0/uplcv?utm_term=indian+air+force+y+group+syllabus+2020+pdf+download
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000eb46.bin
a66081b5c84f60afaed71fe7be5fce6849cae245102fffb89ac46d5a4263aeb3
pdf-font-stream PDF embedded font (sfnt) at offset 0xEB46 11332 bytes
font_01_sfnt_off000105ab.bin
442db1f52851f78a603d5b08390e862bb86aa3ebcb9cfc7c599aa9220cd3de7d
pdf-font-stream PDF embedded font (sfnt) at offset 0x105AB 16748 bytes
font_02_sfnt_off0001317d.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x1317D 16792 bytes