Malicious PDF — malware analysis report

Static analysis result for SHA-256 fe75766e2a0816f2…

MALICIOUS

PDF

82.3 KB Created: 2021-09-08 08:25:38 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: 828141d0fee4a589466bafd80397ee59 SHA-1: 06065254d79a32afa34cfa6c2b78c36a75c18b41 SHA-256: fe75766e2a0816f231f069aff0883e8d6008508ea93ed96c89290790a5a849be
164 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics, including a critical ClamAV detection for 'Pdf.Phishing.Trojan'. The document contains embedded links that point to various domains, suggesting a phishing or malware distribution attempt. The presence of invoice-related language further supports the phishing lure attack pattern. No scripts were extracted, but the link farm nature of the URLs indicates a potential for downloading a second-stage payload.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9981

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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.
  • Fake invoice / payment lure low SE_INVOICE_LURE
    Document contains invoice or payment language paired with an action verb — useful context when combined with link, macro, or attachment indicators
  • 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://jpind.pl/userfiles/file/batexeriwubevokidu.pdf In PDF document text
    • http://snypes.nl/img/customer//files/muzoteker.pdfIn PDF document text
    • http://www.bufolari.com/public/immagini/file/tevimuwekizere.pdfIn PDF document text
    • http://www.kevinbrooks.ca/wp-content/plugins/formcraft/file-upload/server/content/files/160c3076156e87---43280969116.pdfIn PDF document text
    • http://sosonomo.com/ckfinder/userfiles/files/16183892088.pdfIn PDF document text
    • http://abwlondonblvd.com/uploads/files/70563414508.pdfIn PDF document text
    • http://tykhestudiodesigns.com/clients/7/73/7311521ca682816632878891c231d107/File/65975253174.pdfIn PDF document text
    • http://bestbuyfromindia.com/userfiles/file/lumixijabak.pdfIn PDF document text
    • http://hzjksj.com/images/upload/File/44780102959.pdfIn PDF document text
    • https://turdv.ru/SITE/files/editor/file/8525732870.pdfIn PDF document text
    • https://atcotourismtravel.com/userfiles/file/47152993675.pdfIn PDF document text
    • http://kenzoum.org/home/integrity/public_html/ckfinder/userfiles/files/44355624960.pdfIn PDF document text
    • https://www.nordatec.com/wp-content/plugins/super-forms/uploads/php/files/pc97d9kbulcs3dim4l01pckr4m/kufigelojefeterolegege.pdfIn PDF document text
    • http://letsbelegal.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/zegola.pdfIn PDF document text
    • https://pousadamarazul.tur.br/wp-content/plugins/formcraft/file-upload/server/content/files/160884ad8d61b0---kevopi.pdfIn PDF document text
    • https://hotelritariccione.it/wp-content/plugins/formcraft/file-upload/server/content/files/160d2aeae46506---44441881364.pdfIn PDF document text
    • http://samtekelektrik.com/files/duzakujiza.pdfIn PDF document text
    • http://baominhlabors.com/upload/files/bilomawuzis.pdfIn PDF document text
    • http://abwmarlboropike.com/uploads/files/kusofozagu.pdfIn PDF document text
    • http://ccshecea.org/upload/files/magereponedunumamas.pdfIn PDF document text
    • http://golfvillageonline.com/userfiles/file/degavosenejusapodusu.pdfIn PDF document text
    • https://www.kunapak.com/wp-content/plugins/super-forms/uploads/php/files/s6rmd7a4tfp1me2ok5a4lc1dp5/63046506785.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/1KS0DP0cxss/uplcv?utm_term=generate+pdf+from+html+javascriptPDF 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_off0000d94a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD94A 11120 bytes
SHA-256: c23d52a6615cdfebecbd046184427777a463bd0ce004940615add5c30fc9fd86
font_01_sfnt_off0000f30e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF30E 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00010b20.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10B20 18700 bytes
SHA-256: 395995cb78f37ff2b5389ffbe1cd9639be7c68eca3ce6e49a69b38d7db9320f9

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