Malicious PDF — malware analysis report

Static analysis result for SHA-256 ea7541a0be98dbb7…

MALICIOUS

PDF

86.2 KB Created: 2021-06-28 17:02:49 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-18
MD5: c37e8925c07cb2e262c89e637cf948cd SHA-1: de0eb65a3fb66395cb2cb50d5510caf479c0b00c SHA-256: ea7541a0be98dbb78356f6f1b7f9500d22ab367374b0dc505a0ce4632e8c1a1b
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was detected as malicious by ClamAV and an ML classifier. It contains a link farm pointing to compromised WordPress upload storage, suggesting it's part of a phishing or malware distribution campaign. The embedded URLs are designed to redirect users to potentially malicious PDF files hosted on various domains.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9947

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://www.nowsingapore.co.id/wp-content/plugins/formcraft/file-upload/server/content/files/160d7bcea907f0---gogojezugadof.pdf In PDF document text
    • https://maloneslandscape.com/wp-content/plugins/formcraft/file-upload/server/content/files/16090078b3161e---regojolijokinari.pdfIn PDF document text
    • https://mytekas.com/UserFiles/file/90390132764.pdfIn PDF document text
    • http://botosani.ro/img/uploads/file/kegivulal.pdfIn PDF document text
    • https://www.webhisto.com.tr/wp-content/plugins/formcraft/file-upload/server/content/files/16081e8992b3b9---tidesiduzixumapafilugor.pdfIn PDF document text
    • http://www.benvenutialmare.com/wp-content/plugins/formcraft/file-upload/server/content/files/16082a008c66a7---fovugol.pdfIn PDF document text
    • http://xn--b1ahhafccpgkb2bxo.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/9b594519c457250ed60cb3c376e8a84d/75657424296.pdfIn PDF document text
    • http://kezmosas.hu/files/file/89906172116.pdfIn PDF document text
    • https://altinhediyeler.com/calisma2/files/uploads/puzugonurizegakorateme.pdfIn PDF document text
    • http://sciencevier.com/wp-content/plugins/formcraft/file-upload/server/content/files/16097d7a0afe73---98428386900.pdfIn PDF document text
    • http://yasairamenbar.com/uploads/files/regapa.pdfIn PDF document text
    • https://bf-pomosch.ru/wp-content/plugins/super-forms/uploads/php/files/uf9dovpbqvabmea3m2q8fvk0n0/luxomojaxeninosekizabi.pdfIn PDF document text
    • https://www.verpoort-bouw.be/wp-content/plugins/formcraft/file-upload/server/content/files/1607e6d24b22e1---weriwuxarip.pdfIn PDF document text
    • http://www.petersmetalstitching.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/16079896916916---85780810218.pdfIn PDF document text
    • http://bjoybrands.com/wp-content/plugins/formcraft/file-upload/server/content/files/160911cc78c9a3---zaboge.pdfIn PDF document text
    • http://cokhixnktientien.com/Images_upload/files/53889852235.pdfIn PDF document text
    • http://akbmodel.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607e405977e59---18933077720.pdfIn PDF document text
    • http://www.pranabkumar.com/fckimages/file/dewekilewuvejowopibiz.pdfIn PDF document text
    • http://capmar.eu/userfiles/file/16609670713.pdfIn PDF document text
    • https://aydin-elektrik.com/resimler/files/16872743955.pdfIn PDF document text
    • https://isabellepieman.com/userfiles/file/51304988478.pdfIn PDF document text
    • http://kondicionery-krasnogorsk.ru/upload_picture/file/875138911.pdfIn PDF document text
    • http://www.liveartsaskatchewan.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a572dc5478c---tigarinemobuz.pdfIn PDF document text
    • http://musorcentrum.hu/files/article/file/nuxafutewasasukamilesiwek.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/BvfzZFkJO3s/uplcv?utm_term=dilwale+full+movie+download+480pPDF 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_off0000ed5d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xED5D 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off00010574.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10574 10952 bytes
SHA-256: ace8d72ba1bcb91cf363f59a28b7ab982e7f0be9427f00f7247b37ae21b7402d
font_02_sfnt_off00011eda.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11EDA 16940 bytes
SHA-256: 09bf92e122be437f952e5eb5d00e9cd80e8fa724a8e58062d4f94c710d24efe4