Malicious PDF — malware analysis report

Static analysis result for SHA-256 bdc1d69ef4b2c428…

MALICIOUS

PDF

77.1 KB Created: 2021-09-19 10:11:23 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: bf6e52483e17336b739077be300f5437 SHA-1: 780d68cee62c1bd2725baf32be1d9d1345248015 SHA-256: bdc1d69ef4b2c428c3e6744002c491380949c825baa65668783a59d096aa7e89
134 Risk Score

Malware Insights

MITRE ATT&CK
T1059.007 JavaScript T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript, a common technique for executing malicious code within documents. The embedded URI points to a suspicious domain, likely intended for phishing or malware delivery. The ML classifier and ClamAV detection strongly indicate malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9948

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
  • 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.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • 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://nomylo.ru/uplcv?utm_term=psiphon+pro+vpn+apk PDF link annotation
    • http://kaymccarthy.com/immagini/file/69925740182.pdfIn PDF document text
    • https://www.traitagri-solutions-alternatives.fr/ckfinder/userfiles/files/14102646321.pdfIn PDF document text
    • http://texmet.pl/userimages/file/30588291734.pdfIn PDF document text
    • http://adice-area.com/pictures/files/wozadanamadedokapiju.pdfIn PDF document text
    • https://zapcdn.space/web/img/podborky/files/voposudewutiwubuxe.pdfIn PDF document text
    • http://stickerbarcode.com/file_media/file_image/file/sixizineveserawo.pdfIn PDF document text
    • http://studiopol.com/userfiles/files/pizapozadibaxomulezut.pdfIn PDF document text
    • http://mobilenmr.com/files/files/nitejixegabozubosiruxi.pdfIn PDF document text
    • https://easy2ticket.com/upload/files/42204589160.pdfIn PDF document text
    • https://haysalon.com/public_html/userfiles/file/nalerimisavajixuz.pdfIn PDF document text
    • http://bachova-terapia.sk/images/file/18994024299.pdfIn PDF document text
    • https://kalendarz.probik.pl/fckeditor/userfiles/file/78066395366.pdfIn PDF document text
    • https://www.l-games.jp/js/ckfinder/userfiles/files/tazajugedipenimuvi.pdfIn PDF document text
    • http://dreesmann-foto.de/userfiles/file/65907513533.pdfIn PDF document text
    • http://www.espaciocultivarte.com/ckfinder/userfiles/files/nelajeliru.pdfIn PDF document text
    • http://udmvdpo.ru/images/files/7299776916.pdfIn PDF document text
    • http://derkwoo.com/upload/editor/files/33984517934.pdfIn PDF document text
    • https://domilot.com/uploader/files/46649781652.pdfIn PDF document text
    • https://tainandentist.com/uploads/files/202109111910485834.pdfIn PDF document text
    • http://maroba-zirndorf.de/file/vamiruxanozirasiwazin.pdfIn PDF document text
    • https://1tlstar.com/storage/uploads/files/nomijekoweka.pdfIn PDF document text
    • https://suhrsmad.dk/wp-content/plugins/formcraft/file-upload/server/content/files/16137c28eae565---65475493530.pdfIn PDF document text
    • http://kasintorn.com/images/upload/files/ridilifapi.pdfIn PDF document text
    • https://www.assessment.unibe.ch/app/webroot/js/ckfinder/userfiles/files/85479293978.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_off0000c640.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC640 18888 bytes
SHA-256: 0a8b8f53cdb68f244f0773e29e0608c031e1da9b9477b44792074526b337fada
font_01_sfnt_off0000f81e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF81E 10232 bytes
SHA-256: 0142e523e836f293669888962b7e5f6f9f16607ac10d150339dac660cfd409c4
font_02_sfnt_off00010f07.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10F07 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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