Malicious PDF — malware analysis report

Static analysis result for SHA-256 e9f33068da42a622…

MALICIOUS

PDF

88.6 KB Created: 2021-09-21 12:12:30 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 83a04dcda041e506613de9ebbc9cce79 SHA-1: 615952a45e0ceed6a9ecd7c6593eb46ccf23950b SHA-256: e9f33068da42a622be71f6bf607b1f41485679325b6f0e2261a78fadf278dca3
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file was flagged by multiple heuristics as malicious, including a high-confidence ML classifier and ClamAV detection. It contains numerous external URIs pointing to disposable domains, indicating a link farm designed to redirect users to potentially malicious content. The presence of embedded URLs and the nature of the heuristics suggest this document is intended to facilitate phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9942

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://oniceh.ru/uplcv?utm_term=the+bride+julie+garwood+free+download
    • http://321eastern-thailand.com/userfiles/files/riroxe.pdf
    • http://art-lan.ru/uploads/assets/file/7210569482.pdf
    • https://best-label.com/upload/files/27112025570.pdf
    • https://drainscovers.com/wp-content/plugins/super-forms/uploads/php/files/c11caba75b1ae3986ebc76a47141dd93/55454913162.pdf
    • http://zadonskiy.ru/wp-content/plugins/formcraft/file-upload/server/content/files/16132ad50ea0a0---30039916827.pdf
    • https://ises.ca/phpsites/vertical_living/uploads/file/busipevirutoba.pdf
    • http://conhantaoankhanh.com/webroot/img/files/sowexoluzubezigad.pdf
    • https://stancijanegrin.com/UserFiles/files/25904986832.pdf
    • http://www.bongbansaigon.com/uploads/files/liritaxubokufad.pdf
    • https://szabolcsipeter.com/userfiles/file/36461056433.pdf
    • http://weiddy.com/uploads/files/202109041104251131.pdf
    • https://yodishit.com/uploads/userfiles/file/nawimenerupefoliwugelenaj.pdf
    • https://hongmao.tw/uploads/files/202109061952004289.pdf
    • http://kadh.kr/bobod/upload/file/63061188006.pdf
    • https://rimsball.com/ckfinder/userfiles/files/56781179069.pdf
    • https://luckyfood.itweald.com/uploads/files/6136e73c4b7b2.pdf
    • http://silarperu.com/UserFiles/file/fiweluzapozigotak.pdf
    • https://yaofangpeixun.com/upload/files/mapizewiki.pdf
    • https://sindhuinvestment.com/ckfinder/userfiles/files/48930006900.pdf
    • https://pilot-nav.socksnbows.com/ckfinder/userfiles/files/88459523000.pdf
    • http://techbico.vn/uploads/image/files/tulonekepelolesabux.pdf
    • https://bisleriuber.genefied.co/ckfinder/userfiles/files/59138127704.pdf
    • http://p-itos.net/admin/userfile/image/file/wemarafipanijaba.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f4ea.bin
9a7fc061ef702c1927099cd90460e3dfddfe10f20d5f90651ec6eae21b4944e8		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF4EA 18328 bytes
font_01_sfnt_off00012453.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x12453 16792 bytes
font_02_sfnt_off00013c6a.bin
6040da7ff26bfd559b9c55e0da94007025ff372bb9012c810a8ebcc2ee8d36c9		 pdf-font-stream PDF embedded font (sfnt) at offset 0x13C6A 10788 bytes

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