Malicious PDF — malware analysis report

Static analysis result for SHA-256 4eb6aa9a15ee0934…

MALICIOUS

PDF

85.5 KB Created: 2021-08-08 07:52:39 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: f3f0d0f2b435b5095be6337a4a38d534 SHA-1: ace04955f0f1cb2807670d01f68d459bd8a8fd86 SHA-256: 4eb6aa9a15ee09342e9de9d935a11ada3bbd128d71e13985af10d27d547cc9c6
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious File

The file is identified as malicious by ML classifiers and ClamAV, indicating a phishing or trojan threat. It contains numerous links to compromised WordPress sites, suggesting a link farm designed to host and distribute malicious files. The presence of a 'download' button lure further supports the intent to trick users into downloading the payload.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9974

Heuristics 7

  • 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.
  • 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 https://2greenchicks.com/wp-content/plugins/super-forms/uploads/php/files/00861b925c9befd1cb321b5a60638ced/tonumexoximizotewadobem.pdf In PDF document text
    • https://dezsredstvompx.ru/wp-content/plugins/super-forms/uploads/php/files/291ccb50d71f77b1372189357e3120bc/40495824522.pdfIn PDF document text
    • https://www.idahomedia.com/wp-content/plugins/super-forms/uploads/php/files/9dd5d15204bca11a83146d64f089b1ad/60805177449.pdfIn PDF document text
    • http://www.ibadirect.com/wp-content/plugins/formcraft/file-upload/server/content/files/16074911a902f7---jimutexagozafoluwagele.pdfIn PDF document text
    • http://vendsol.com/userfiles/file/miwumelamulipejidep.pdfIn PDF document text
    • http://xn--rssx31a7tec6p.com/upload/userfiles/files/20210716134910.pdfIn PDF document text
    • http://crediramasrl.it/public/file/27240603653.pdfIn PDF document text
    • http://lussoleathertiles.com/test4/EDITOR/example/v2/userfiles/file/wunimebuno.pdfIn PDF document text
    • https://artedeeducar.com.br/ckfinder/userfiles/files/vumupito.pdfIn PDF document text
    • https://mimpishio2bet.com/contents//files/gofawibijurifin.pdfIn PDF document text
    • http://iteequipment.com/clients/65150/File/povagosuvatipipako.pdfIn PDF document text
    • http://enjoyisagenix.com/ckfinder/userfiles/files/98745592539.pdfIn PDF document text
    • https://www.eziblank.com/wp-content/plugins/super-forms/uploads/php/files/ca73ab365349e0e59a47236c37f93525/gubapuvajokiv.pdfIn PDF document text
    • http://traditionsradio.com/wp-content/plugins/super-forms/uploads/php/files/9iaete0cv85cp8lj7nd1l4qjk1/83968752298.pdfIn PDF document text
    • https://www.dyna-tech.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1607fc72d4812a---74563059224.pdfIn PDF document text
    • https://nuregio.de/wp-content/plugins/formcraft/file-upload/server/content/files/160a0e60f8774a---nudetiterenajuwoxatuwe.pdfIn PDF document text
    • http://domusanna.it/userfiles/files/31883553715.pdfIn PDF document text
    • http://bakoca.hu/files/file/mekiporixip.pdfIn PDF document text
    • http://www.introspekta.si/ckfinder/ckeditor_uploaded_files/files/76139088243.pdfIn PDF document text
    • http://minhanh.com/files/77846198055.pdfIn PDF document text
    • https://ceadersvalet.com/wp-content/plugins/formcraft/file-upload/server/content/files/16083fb54b2d52---81062286721.pdfIn PDF document text
    • http://www.risingstars.com.tr/wp-content/plugins/formcraft/file-upload/server/content/files/16080972826b08---feguxomix.pdfIn PDF document text
    • https://abofahed.com/userfiles/file/wibex.pdfIn PDF document text
    • http://ricarda-allegra.de/userfiles/file/dazekenodisafekitavakeru.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/LPIa9PGmDLg/uplcv?utm_term=canon+lbp6000%2Flbp6018+driver+windows+7+32+bitPDF 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_off0000e4b1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE4B1 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000fcc8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFCC8 11632 bytes
SHA-256: fa600d3c221e429c0c434c9dc610f0d9f10fe44c10f3281e2c5259b32ae3c312
font_02_sfnt_off0001189b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1189B 17316 bytes
SHA-256: 3a26a404e5a97b4611f9ae93214f43c1d2cec8fc7d6dd6808fe86860c0beb9b6