Malicious PDF — malware analysis report

Static analysis result for SHA-256 385f252653e8149d…

MALICIOUS

PDF

49.2 KB Created: 2021-06-03 12:53:08 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-11-21
MD5: 352e7e4ac5664c0e7215425f0b6f0dcf SHA-1: c2d09786a96d989a1ed2578497f8907d0eebab02 SHA-256: 385f252653e8149d3bc51859c185cb2f17cf34af01f05d83b9bcaff9ab89423f
200 Risk Score

Malware Insights

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

This PDF document employs a social engineering lure related to game hacks and generators, directing users to a malicious redirector. The document body and embedded links suggest an attempt to trick users into downloading or accessing potentially harmful content. The SE_CLICKFIX heuristic indicates the document may also instruct users to manually execute commands, further increasing the risk of payload execution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9796

Heuristics 5

  • PDF links to a 'free generator / game hack' redirector critical PDF_GAME_HACK_REDIRECT_LURE
    PDF's clickable action targets a redirector of the form /app/<id>/<slug>-game-hack — the landing-page shape of a large SEO 'free spins / generator / game hack' lure family that funnels victims through rotating disposable hosts to a malware/scam payload. The multi-link variants also trip ML/link-farm rules; this catches the single-link variants that otherwise score clean. CRITICAL on its own: the /app/<id>/<slug>-game-hack path shape is unambiguous scam infra, and the host rotates so a host-list match can't be relied on.
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • ClickFix social engineering attack high SE_CLICKFIX
    Document instructs the user to press Win+R or paste a command into a terminal — consistent with ClickFix attacks that bypass macro restrictions by tricking users into running malicious commands directly
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://netcdn.online/app/479516143/minecraft-bedrock-edition-pc-download-free-game-hack In PDF document text
    • http://opac.stiesa.ac.id/repository/coin-master-facebook-page_GM406889139.pdfIn PDF document text
    • http://opac.stiesa.ac.id/repository/coin-master-hack-fast-org_GM406889139.pdfIn PDF document text
    • http://opac.stiesa.ac.id/repository/download-coin-master-hack-mod-apk_GM406889139.pdfIn PDF document text
    • http://opac.stiesa.ac.id/repository/free-robux-groups-2021_GM431946152.pdfIn PDF document text
    • http://opac.stiesa.ac.id/repository/coin-master-free-spins-and-free-coins_GM406889139.pdfIn PDF document text
    • http://opac.stiesa.ac.id/repository/free-minecraft-skin-packs_GM479516143.pdfIn PDF document text
    • http://opac.stiesa.ac.id/repository/easy-roblox-today_GM431946152.pdfIn PDF document text
    • http://opac.stiesa.ac.id/repository/free-roblox-toy-codes-2021_GM431946152.pdfIn PDF document text
    • http://opac.stiesa.ac.id/repository/free-spins-on-coin-master-iphone_GM406889139.pdfIn PDF document text
    • http://opac.stiesa.ac.id/repository/coin-master-online-hack-download_GM406889139.pdfIn PDF document text
    • http://opac.stiesa.ac.id/repository/mcpe-master-coin-hack-apk_GM406889139.pdfIn PDF document text
    • http://opac.stiesa.ac.id/repository/free-robux-for-free_GM431946152.pdfIn PDF document text
    • http://opac.stiesa.ac.id/repository/haktuts-coin-master-free-spins-2021_GM406889139.pdfIn PDF document text
    • http://opac.stiesa.ac.id/repository/coin-master-free-400-spin-link_GM406889139.pdfIn PDF document text
    • http://opac.stiesa.ac.id/repository/robux-generator-no-verification-2021_GM431946152.pdfIn PDF document text
    • http://opac.stiesa.ac.id/repository/hack-coin-master-apk-ios_GM406889139.pdfIn PDF document text
    • http://opac.stiesa.ac.id/repository/free-roblox-website_GM431946152.pdfIn PDF document text
    • http://opac.stiesa.ac.id/repository/robuxmatchcon_GM431946152.pdfIn PDF document text
    • http://opac.stiesa.ac.id/repository/tiktok-free-book-hack_GM835599320.pdfIn PDF document text
    • http://opac.stiesa.ac.id/repository/how-to-get-creative-mode-in-minecraft-server-hack_GM479516143.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_004_off00005419.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x5419 28400 bytes
SHA-256: 9260264294bba2f2a4006c4b5f1998e98efcf9713089934c80b246a15fdb4087
font_01_sfnt_off0000929a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x929A 2824 bytes
SHA-256: 32afe7424993ed77feed76f83a3afdb3d3391dbb877b7f4b0d7509f28dd06233
font_02_sfnt_off00009c41.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9C41 18828 bytes
SHA-256: bab883dfc84e1a3f345dfae0998a7e69f5c6c1aec602e5a20de586714fc0e9f0

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