Malicious PDF — malware analysis report

Static analysis result for SHA-256 51e747a4cb5b4a7f…

MALICIOUS

PDF

80.9 KB Created: 2021-09-13 06:52:31 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-05
MD5: 617d4918c7d4c5b74f90cb458c233716 SHA-1: fd039404d0385d667d89dc5bfebd689948ceec0b SHA-256: 51e747a4cb5b4a7fbe8cb362a4c372a1e8436e2786b07739d798b3ed7182888f
126 Risk Score

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9960

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 https://szpital-sulecin.pl/images/fckfiles/file/wugawomuxidutusut.pdf In PDF document text
    • https://dom4m.de/userfiles/files/zuxumozatovuguxibanozo.pdfIn PDF document text
    • http://evo-models.com/uploads/userfiles/files/9728577215.pdfIn PDF document text
    • http://sl-light.ru/design/img/upload/file/87919612144.pdfIn PDF document text
    • https://habrit.tw/ckfinder/userfiles/files/43857903404.pdfIn PDF document text
    • http://www.catalogodecineargentino.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613a823bb20a4---danemivepekanusegope.pdfIn PDF document text
    • https://108pizza.pl/uploads/userfiles/files/diwugedovuwemewiwesap.pdfIn PDF document text
    • http://areaengineeringsrl.eu/userfiles/files/46036543885.pdfIn PDF document text
    • http://floral-design-lindgens.de/userfiles/file/bewupeberefuzuselusakuta.pdfIn PDF document text
    • http://ambvetfanini.eu/userfiles/files/41531898151.pdfIn PDF document text
    • http://cbcom.fr/ressource/site-image/files/53750994539.pdfIn PDF document text
    • https://baxsporthorses.nl/userfiles/file/pegubexeda.pdfIn PDF document text
    • https://madeirashopping.com/userfiles/file/rujekiluzagenozowa.pdfIn PDF document text
    • http://rockhousemethod.com/ckfinder/userfiles/files/popokuwap.pdfIn PDF document text
    • https://vasutaszeneiskola.hu/ckfinder/userfiles/files/55312967494.pdfIn PDF document text
    • http://atomicattack.com/atomic/fckimages/file/livewedavikerowi.pdfIn PDF document text
    • http://a899.net/userfiles/file/70776466042.pdfIn PDF document text
    • http://statsale.com/data/upload/ck/files/sabefanejonovopan.pdfIn PDF document text
    • https://ccaquebec.com/userupload/files/tegosowadopowi.pdfIn PDF document text
    • https://tomorrowhubs.com/upload/users/files/biwoziwe.pdfIn PDF document text
    • http://eggtesting.com/admin/uploads/file/pimonanabusur.pdfIn PDF document text
    • http://www.jasolasia.com/image/upload/File/46325507173.pdfIn PDF document text
    • http://barexkft.hu/userfiles/file/31404903320.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/zMnd8XtcwSM/uplcv?utm_term=zombie+gunship+survival+hack+iosPDF 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_off0000d794.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD794 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000efab.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEFAB 11084 bytes
SHA-256: 6945b2413095a910cf5eaee6fa2d16d3323ae292a29f1d4ba5be2a829c06c2bb
font_02_sfnt_off0001091d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1091D 17240 bytes
SHA-256: 8265b6291236929d26e179be837413ad1d0dac3c4c2f4db8423b7ea78b26c944

Open this report in the interactive analyzer, or submit your own file for analysis.