Malicious PDF — malware analysis report

Static analysis result for SHA-256 2f657b611b32db20…

MALICIOUS

PDF

73.8 KB Created: 2021-09-07 21:51:53 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14
MD5: e5740a22cd87348460642ed2c0bf4184 SHA-1: aa5272868b8ec74b3daf20c714260c7c820dd10a SHA-256: 2f657b611b32db20a9006f4a1f5874c23e0bab82de05e90abff5810a3a12fa99
156 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics and an ML classifier as malicious, with ClamAV identifying it as a phishing trojan. It functions as a link farm, containing numerous URLs that point to compromised WordPress sites, likely intended to lure users into downloading further malicious content or engaging in phishing activities. No scripts were extracted, and the document body was unreadable binary data.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9984

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.rowtheerne.com/wp-content/plugins/super-forms/uploads/php/files/4554c2c7a51ec69e9b47012f117f5619/94705822398.pdf In PDF document text
    • http://peggylittlelawoffice.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/nanaw.pdfIn PDF document text
    • https://apexforestservices.com/wp-content/plugins/formcraft/file-upload/server/content/files/160fe003de1542---12749293023.pdfIn PDF document text
    • https://chocoinmobiliario.com/wp-content/plugins/super-forms/uploads/php/files/69264b56630756fd10a9f425aec28e9c/54895720676.pdfIn PDF document text
    • http://psychologyforeverybody.com/ckfinder/userfiles/files/86753927999.pdfIn PDF document text
    • https://edouardweil.com/userfiles/file/72408489761.pdfIn PDF document text
    • https://gearforfree.com/wp-content/plugins/super-forms/uploads/php/files/nd2k40v289ke52pcqo5qkcps95/50405919871.pdfIn PDF document text
    • http://x04ydivan.ru/userfiles/file/30210549916.pdfIn PDF document text
    • http://asesorgubernamental.com/images/file/rosiwilezusoxopuvosiwup.pdfIn PDF document text
    • https://viettincapital.vn/upload/files/78813977386.pdfIn PDF document text
    • http://ophirtonhotel.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/160c319ae2a182---pipinelobame.pdfIn PDF document text
    • http://vakantie-noordlimburg.nl/ckfinder/userfiles/files/23876773903.pdfIn PDF document text
    • http://www.peplex.it/wp-content/plugins/formcraft/file-upload/server/content/files/1606caa9be7bc2---15898810333.pdfIn PDF document text
    • https://innovaciones-plasticas.com/imagenes_cont/sitio/documentos/54600699591.pdfIn PDF document text
    • https://cspdental.com/wp-content/plugins/super-forms/uploads/php/files/8bcd220882bd90c5d15071f185611a9f/42024636132.pdfIn PDF document text
    • http://vhshf.de/File/luvexatufinubawipis.pdfIn PDF document text
    • http://lnv-cnc.com/userfiles/file/51144986612.pdfIn PDF document text
    • https://cls-toronto.com/wp-content/plugins/super-forms/uploads/php/files/615f68da737d22419add3f4118bccc8a/72099294910.pdfIn PDF document text
    • http://hanifeugur.com/image/files/vugusozidabirirebuk.pdfIn PDF document text
    • http://yuanjiangchem.com/upload/files/72496884610.pdfIn PDF document text
    • http://wanyuantemple.tw/userfiles/file/47572382579.pdfIn PDF document text
    • https://law.myvzl.com/wp-content/plugins/super-forms/uploads/php/files/kj1cm2pa7j8p1gboglp8p7n4en/komowumizejotowatufuka.pdfIn PDF document text
    • https://srldirect.com/ckfinder/userfiles/files/86779313565.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/1xuhb7AK25c/uplcv?utm_term=naghmat+e+hasna+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_off0000bbc9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBBC9 10564 bytes
SHA-256: 1e702cf0343c2eed742020cf0875ce928cacfc4e5c649e9c3091f567b5b71a0f
font_01_sfnt_off0000d379.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD379 17008 bytes
SHA-256: 5ce53bc39db49274a4a21774be4e276c9a09d1e1894b3cad97be8e74ffa2b157
font_02_sfnt_off0000ff85.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFF85 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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