Malicious PDF — malware analysis report

Static analysis result for SHA-256 2fe42d99e99c9e1c…

MALICIOUS

PDF

86.0 KB Created: 2021-09-06 10:53:58 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14
MD5: d258beb92f11a9033ff43b79d5e4a60b SHA-1: df7ea9d6c082d5e20a7d50b3cf8d904056d63ba7 SHA-256: 2fe42d99e99c9e1c146664e8946b005efb27d22ffb9c7bbdaa3829a1d9257688
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was identified as malicious by ML classifiers and ClamAV, indicating it is likely a phishing or malware distribution lure. The document functions as a link farm, containing numerous URLs pointing to compromised WordPress sites and disposable hosting domains. These links are designed to redirect users to potentially malicious content or downloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9912

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://garglob.ru/uplcv?utm_term=comment+r%C3%A9duire+la+taille+d%27un+document+pdf PDF link annotation
    • http://chinawin-consult.com/userfiles/tekirakudibisivirekaro.pdfIn PDF document text
    • http://drinkandshrink.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/1607e85f065162---nokodarajobalojikigun.pdfIn PDF document text
    • https://satbietthu.com/luutru/files/jefajiwuwefoduwexe.pdfIn PDF document text
    • https://sportnazona.bg/f/uploads/files/35192676548.pdfIn PDF document text
    • http://www.deadclan.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1608f747e01b93---89661751045.pdfIn PDF document text
    • http://heldermusic.nl/ckfinder/userfiles/files/56367366612.pdfIn PDF document text
    • https://iamluno.com/wp-content/plugins/formcraft/file-upload/server/content/files/160f284854d4bd---wapadut.pdfIn PDF document text
    • http://vinabomi.com/uploads/userfiles/file/tawolugevol.pdfIn PDF document text
    • http://admio.ru/wp-content/plugins/formcraft/file-upload/server/content/files/1610e0f01bf261---73406249518.pdfIn PDF document text
    • http://www.bewegeninarnhem.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160c933648f090---puzixipa.pdfIn PDF document text
    • https://www.goldenplanet.dk/wp-content/plugins/formcraft/file-upload/server/content/files/160a93bd0d12f7---31544896226.pdfIn PDF document text
    • http://cristalensi.com/public/File/vuzajuxaburufuwux.pdfIn PDF document text
    • http://aygroupmuh.com/image/files/paxufata.pdfIn PDF document text
    • http://baschin-heizung.com/meineBilderAlbertGrundschule/file/muwike.pdfIn PDF document text
    • https://www.igescanada.com/ckfinder/userfiles/files/dopevanisagowesuva.pdfIn PDF document text
    • http://xn--80aaa1acmiejxr6d7fg.xn--p1ai/data/files/47397060038.pdfIn PDF document text
    • http://iscyber.com/userfiles/files/jutevafezuw.pdfIn PDF document text
    • https://forthepeoplegov.com/userfiles/file/73762327527.pdfIn PDF document text
    • http://prosquash.by/data/bejazaduwunabedak.pdfIn PDF document text
    • http://china-zub.ru/userfiles/file/lizebakevifex.pdfIn PDF document text
    • http://bbfederico2.net/userfiles/file/11202937912.pdfIn PDF document text
    • https://musikkursus.dk/userfiles/file/maxuvujinonivutumewa.pdfIn PDF document text
    • https://www.spitalmoldovanoua.ro/ckfinder/userfiles/files/bafetogibobubu.pdfIn PDF document text
    • https://t4g.nasscomfoundation.org/wp-content/plugins/super-forms/uploads/php/files/uic16vpkcv8cpd3im0ou3rbge7/56252983439.pdfIn PDF document text
    • https://catwalkdogcome.com/editor_upload_image/file/3494940658.pdfIn PDF document text
    • http://vngo-cc.vn/cooker/public/files/15639571118.pdfIn PDF document text
    • 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_off0000e34d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE34D 20252 bytes
SHA-256: fa36ddd7680a7cf1718ade376a1730c80f1acc85b434cf9cb3e8b20779b527f4
font_01_sfnt_off0001163a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1163A 10932 bytes
SHA-256: 12395fe33add48c4bd05fcfe35bad81e89ac4d5c2cdd36de27bd1d0a05ce3a4d
font_02_sfnt_off00012f3a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12F3A 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1