Malicious PDF — malware analysis report

Static analysis result for SHA-256 5af788b4b7148c26…

MALICIOUS

PDF

86.6 KB Created: 2021-09-23 00:19:35 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: 06648c3ac3e50f5d368a2f7b3825a808 SHA-1: 5040e9c1071904f500f76a252202ea628a1d87b4 SHA-256: 5af788b4b7148c26d8f0e0c117540a433f59895d5c7f2822b490d9f0fb92b60e
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file was identified as malicious by ML classifiers and ClamAV, indicating a phishing or trojan threat. It contains numerous embedded URLs, many of which point to disposable hosting and appear to be part of a link farm, suggesting a phishing or scam attempt. The primary lure is related to 'free NBA 2K20 locker codes', directing users to a suspicious domain.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9976

Heuristics 5

  • 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.
  • 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://smidgel.ru/uplcv?utm_term=free+nba+2k20+locker+codes PDF link annotation
    • http://asbu.net/uploads/FCK_files/file/mebikidiwosirutumirigexag.pdfIn PDF document text
    • http://pn-tech.net/userData/board/file/papevumege.pdfIn PDF document text
    • http://linker-apps.com/files/99749015544.pdfIn PDF document text
    • http://rjbmachinery.com/d/files/34531142554.pdfIn PDF document text
    • https://glycocalyx.nl/userfiles/image/file/babije.pdfIn PDF document text
    • http://donkaew-furniture.com/ckfinder/userfiles/files/gewuguxetifirutelisuva.pdfIn PDF document text
    • https://texasbordervolunteers.org/userfiles/file/49026477724.pdfIn PDF document text
    • https://wsbtitan.com/images/file/62549030870.pdfIn PDF document text
    • https://rallstarawards.us/nbloom/fckuploads/file/80363561652.pdfIn PDF document text
    • https://livredart.com/ckfinder/userfiles/files/lewaruzev.pdfIn PDF document text
    • http://guss-ex.de/uploads/fck/file/siliw.pdfIn PDF document text
    • http://flex-link.cn/uploadfiles/files/70685545349.pdfIn PDF document text
    • http://buyyoutubelikes.com/ci/userfiles/files/41851462583.pdfIn PDF document text
    • https://5974293.pasarantogel.com/contents/files/78722122131.pdfIn PDF document text
    • http://webursitet.org/Files/file/sagalatewobixugejonadezip.pdfIn PDF document text
    • https://fiberglasssupplydepot.com/userfiles/files/bolef.pdfIn PDF document text
    • http://letnipohar.cz/upload/file/4916118308.pdfIn PDF document text
    • http://ckpak.com/fckeditor/userfiles/file/25631739893.pdfIn PDF document text
    • https://bizdrive.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1/1613a6f38d956b---97414901406.pdfIn PDF document text
    • http://snieznik.pl/userfiles/file/48400833557.pdfIn PDF document text
    • http://ch-yang.com/upload/files/patemava.pdfIn PDF document text
    • https://thuaphatlaihoanghuy.com/uploads/files/woxeju.pdfIn PDF document text
    • http://www.puhito.hu/uploads/38841915065.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_off0000ebfd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEBFD 18396 bytes
SHA-256: 5dc9b097efab53c1a881a4261cd93b26015aea9bb0b8f01342570293add64c46
font_01_sfnt_off00011c68.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11C68 10624 bytes
SHA-256: 819153bf3624d42e6baa77b5e1cf71931087af16967402892bf8b6183d95ad63
font_02_sfnt_off000134d1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x134D1 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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