Malicious PDF — malware analysis report

Static analysis result for SHA-256 fe5b11ff727e0ced…

MALICIOUS

PDF

73.0 KB Created: 2021-10-07 07:08:55 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-25
MD5: 755ba22afe53be43ac1f7fb276595f79 SHA-1: 5893ebf6e1fb6a5f516253c9ea89ecc72338e7fd SHA-256: fe5b11ff727e0cedc7665021237ce0f34583766f384d26a222504e69d08f7f73
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file was flagged by multiple heuristics, including a high-confidence ML classifier and ClamAV, indicating malicious content. The presence of numerous embedded URLs, many pointing to disposable domains and configured as a link farm, suggests a phishing or malware distribution attempt. Although no scripts were explicitly extracted, the PDF structure and URL patterns are consistent with malicious documents designed to redirect users to harmful sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9963

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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.
  • 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://a-range.ru/wp-content/plugins/formcraft/file-upload/server/content/files/161493f7ecda32---22573687188.pdf In PDF document text
    • http://kidneytracker.com/ckfinder/userfiles/files/jifivebe.pdfIn PDF document text
    • https://shivajigrihnirman.com/singhania/downloads/file/50460791622.pdfIn PDF document text
    • http://bassonconsulting.mc/userfiles/file/vapofafibufinuzaxukugem.pdfIn PDF document text
    • https://jamuiboe.com/webroot/upload_media/jenerevozegapeguzoziroxid.pdfIn PDF document text
    • https://vietnaminsight.biz/ckfinder/userfiles/files/vijavumovosepagomi.pdfIn PDF document text
    • https://duvarkagidierzincan.com/userfiles/file/zenusesafovapovura.pdfIn PDF document text
    • https://fontaine-eva.fr/userfiles/files/puvemigegujigilu.pdfIn PDF document text
    • https://faguaflowers.com/images/admin/file/jipofekuzexagodarefon.pdfIn PDF document text
    • http://labsshop.com/d/files/31200099470.pdfIn PDF document text
    • https://reformedgeneration.com/userfiles/file/navawe.pdfIn PDF document text
    • http://lse.hu/userfiles/file/15583007234.pdfIn PDF document text
    • https://natyabio.com/uploadfiles/75606060608.pdfIn PDF document text
    • http://sportsgarten.com/editorData/file/kefosorasowozuse.pdfIn PDF document text
    • http://schokofontaenen.de/idata/wotadamepevirosa.pdfIn PDF document text
    • http://kondicionery-lubertsy.ru/upload_picture/file/woxefibarexugifatekite.pdfIn PDF document text
    • http://caogenzhiben.com/filespath/files/20210921175249.pdfIn PDF document text
    • https://nicemexico.net/wp-content/plugins/formcraft/file-upload/server/content/files/1614f311b7d919---95216014135.pdfIn PDF document text
    • http://www.annaleehuber.com/content_files/file/dalifuwetozigufofalura.pdfIn PDF document text
    • http://npi-management.fr/ressource/site-image/files/65142465998.pdfIn PDF document text
    • http://bsl-trans.ru/admin/ckfinder/userfiles/files/31771010184.pdfIn PDF document text
    • https://m-audio.vn/img-m-audio/files/goremopuv.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/YTWXjIUwRh0/uplcv?utm_term=would+you+like+to+comePDF 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_off0000ba63.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBA63 17560 bytes
SHA-256: 7e7aa817adef0165fab614d13bc24f64bc5dfb2f47ea8c4b97a522c7d67a3c5f
font_01_sfnt_off0000e7a8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE7A8 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0000ffbf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFFBF 10296 bytes
SHA-256: 1bad025fe9cd0f6f27f7f863e0e22e08dd5aceacdc26bb81ec014f7106c6cfab

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