Malicious PDF — malware analysis report

Static analysis result for SHA-256 95687ede489b0cc3…

MALICIOUS

PDF

47.4 KB Created: 2021-05-11 02:10:59 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-11-20
MD5: de1944704131a6bf249f572f59817334 SHA-1: 632e1b08a924da2406fd6c15c7bc99e1e0e6b8cd SHA-256: 95687ede489b0cc36c6597ded8e1450aa6187f10141d8ec9f14aafe1e917a6ee
200 Risk Score

Malware Insights

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

The PDF document contains multiple links to malicious redirectors, disguised as 'free generator / game hack' lures. It also presents a fake CAPTCHA to trick users into interacting with the malicious content. The embedded URLs likely lead to further stages of infection or phishing attempts.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9013

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.
  • Fake CAPTCHA / human verification prompt high SE_FAKE_CAPTCHA
    Document displays a fake CAPTCHA or human-verification prompt — used to trick users into running commands or pressing keyboard shortcuts
  • 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.xyz/app/431946152/how-do-you-get-free-robux-2021-game-hack In PDF document text
    • http://libnh.stikesnh.ac.id/repository/free-spin-coin-master-iphone_GM406889139.pdfIn PDF document text
    • http://libnh.stikesnh.ac.id/repository/get-free-spins-coin-master_GM406889139.pdfIn PDF document text
    • http://libnh.stikesnh.ac.id/repository/ios-coin-master-hack_GM406889139.pdfIn PDF document text
    • http://libnh.stikesnh.ac.id/repository/websites-that-give-you-free-robux_GM431946152.pdfIn PDF document text
    • http://libnh.stikesnh.ac.id/repository/coin-master-free-spins-for-today_GM406889139.pdfIn PDF document text
    • http://libnh.stikesnh.ac.id/repository/free-robux-thumbnail_GM431946152.pdfIn PDF document text
    • http://libnh.stikesnh.ac.id/repository/roblox-weird_GM431946152.pdfIn PDF document text
    • http://libnh.stikesnh.ac.id/repository/minecraft-hacks-pc_GM479516143.pdfIn PDF document text
    • http://libnh.stikesnh.ac.id/repository/free-robux-generator-no-human-verification-2021_GM431946152.pdfIn PDF document text
    • http://libnh.stikesnh.ac.id/repository/how-to-get-free-coins-on-coin-master_GM406889139.pdfIn PDF document text
    • http://libnh.stikesnh.ac.id/repository/no-scam-free-robux_GM431946152.pdfIn PDF document text
    • http://libnh.stikesnh.ac.id/repository/coin-master-free-spins-generator-no-human-verification_GM406889139.pdfIn PDF document text
    • http://libnh.stikesnh.ac.id/repository/robux-hack-me_GM431946152.pdfIn PDF document text
    • http://libnh.stikesnh.ac.id/repository/roblox-robux-generator_GM431946152.pdfIn PDF document text
    • http://libnh.stikesnh.ac.id/repository/how-to-get-free-robux-easy-2021_GM431946152.pdfIn PDF document text
    • http://libnh.stikesnh.ac.id/repository/free-spins-coin-master-hack-2021_GM406889139.pdfIn PDF document text
    • http://libnh.stikesnh.ac.id/repository/roblox-free-play_GM431946152.pdfIn PDF document text
    • http://libnh.stikesnh.ac.id/repository/mistplay-robux_GM431946152.pdfIn PDF document text
    • http://libnh.stikesnh.ac.id/repository/master-game_GM406889139.pdfIn PDF document text
    • http://libnh.stikesnh.ac.id/repository/moonactive-free-spins-2021_GM406889139.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_003_off00004c10.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4C10 24448 bytes
SHA-256: 78ef21e2297f4c1f597cd82cddbf2b18cd340a87b57adc31f4fb3f911c64fdce
font_01_sfnt_off00008448.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8448 6636 bytes
SHA-256: 62075f0fe13502d46afb6e55e83d440c29ef4988399537df1f86e7653ce3b744
font_02_sfnt_off00009455.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9455 19016 bytes
SHA-256: 7afc4835c6f8d200a546e15f78f642ba5dd88c8fac7df04bc3003dd1e9f7232a

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