Malicious PDF — malware analysis report

Static analysis result for SHA-256 a2469bdac3db0599…

MALICIOUS

PDF

80.8 KB Created: 2021-09-15 20:43:44 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23
MD5: 55b90936f9f2b9f35de740e752e59e66 SHA-1: 2c9509da4cee7b6be5a9f54dfa3d6c810e5ff3c6 SHA-256: a2469bdac3db059941c5d168e5e0311a3cd68d4755f17429c3db573769d8bb52
166 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF document was flagged by ML classifiers and ClamAV as malicious, with heuristics indicating a lure for remote support tools. The document body, though heavily obfuscated, contains embedded URLs that likely lead to the download of malicious payloads or further phishing content. The presence of multiple external URIs and a link farm structure suggests an attempt to distribute malware or redirect users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Remote-support tool lure high SE_REMOTE_SUPPORT_LURE
    Document instructs the user to install, open, or connect with a remote-support tool such as AnyDesk, TeamViewer, Quick Assist, or ScreenConnect — high-risk in an unsolicited document
  • 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://crysiq.ru/uplcv?utm_term=splashtop+personal+mod+apk PDF link annotation
    • https://semagro-msw.ru/pics/images/file/velusagi.pdfIn PDF document text
    • https://ximangcampha.vn/upload/files/69601707629.pdfIn PDF document text
    • http://aunay-sous-auneau.fr/ckfinder/userfiles/files/vopupakudo.pdfIn PDF document text
    • http://oilspecchem.com/files/20231161118.pdfIn PDF document text
    • http://kmsenior.org/file/files/41663252718.pdfIn PDF document text
    • https://consurs.ro/ckfinder/userfiles/files/tigipugekirajuxewor.pdfIn PDF document text
    • http://hotel-ambassador-nice.com/upload/files/95906335163.pdfIn PDF document text
    • http://aucontecnologia.com/userfiles/files/kuvodov.pdfIn PDF document text
    • https://123kozijnofferte.nl/wp-content/plugins/super-forms/uploads/php/files/497676cd55868aa9eaa89b0a185c2db2/81175059605.pdfIn PDF document text
    • https://chokysitohang.com/Uploads/userfiles/files/15087561276.pdfIn PDF document text
    • http://pomodorolennep.de/gfx/userfiles/files/20264344299.pdfIn PDF document text
    • http://sinostandards.net/upload/files/19811195022.pdfIn PDF document text
    • http://netdepphunu.vn/images/userfiles/file/wapades.pdfIn PDF document text
    • http://accurateverdicts.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613b9cc63cdd3---85239579338.pdfIn PDF document text
    • https://kudamatsu.org/userfiles/file/zurekibonuzo.pdfIn PDF document text
    • https://sukienmiennam.com/userupload/files/fifezametozaj.pdfIn PDF document text
    • http://bctlorraine.org/userfiles/file/pusexawufuvulelabadijotut.pdfIn PDF document text
    • http://bukhatirhomes.com/userfiles/file/48273255909.pdfIn PDF document text
    • http://dongzzang.com/userfiles/file///48121439705.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_off0000d484.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD484 18848 bytes
SHA-256: f5e80caf585ef2dd0dfe9566e8e361e29ae0236f1f5932ca16d1a503f844cd51
font_01_sfnt_off000105df.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x105DF 10732 bytes
SHA-256: 6bcd904b8379cff003d29f2d3f38444cadff6eeb1564dff2ee8fa8c3771dddd8
font_02_sfnt_off00011e5f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11E5F 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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