Malicious PDF — malware analysis report

Static analysis result for SHA-256 0f6aeeb9afe9e7f4…

MALICIOUS

PDF

33.3 KB Created: 2021-07-05 09:29:03 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-27
MD5: 8daf4f2172ea5fbbceec644b64d46a52 SHA-1: 384e88853f5b84453cea198f80f74fd4d80b423d SHA-256: 0f6aeeb9afe9e7f47ba3e599c511db029ff24ae21612be5d03db6dbf04cd8c44
200 Risk Score

Malware Insights

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

The PDF document contains multiple links to known malicious redirectors and game hack generators, aiming to trick users into clicking through a fake CAPTCHA. The document's content and embedded links suggest a social engineering lure, likely to download further malware or lead to a phishing site. While no scripts were explicitly extracted, the PDF structure and embedded URLs are indicative of a malicious workflow.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9824

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 http://netcdn.tw/app/431946152/ww-robux-game-hack In PDF document text
    • http://library.umla.ac.id/repository/free-robux-no-human-verification-on-phone_GM431946152.pdfIn PDF document text
    • http://library.umla.ac.id//repository/get-free-spins-coin-master-2021_GM406889139.pdfIn PDF document text
    • http://library.umla.ac.id//repository/how-do-you-get-free-roblox-money_GM431946152.pdfIn PDF document text
    • http://library.umla.ac.id//repository/roblox-free-robux-hack_GM431946152.pdfIn PDF document text
    • http://library.umla.ac.id/repository/free-minecraft-domain_GM479516143.pdfIn PDF document text
    • http://library.umla.ac.id//repository/minecraft-maps-pe-free-download_GM479516143.pdfIn PDF document text
    • http://library.umla.ac.id//repository/coin-master-pet-food-hack_GM406889139.pdfIn PDF document text
    • http://library.umla.ac.id/repository/free-robux-no-human-verification-generator_GM431946152.pdfIn PDF document text
    • http://library.umla.ac.id/repository/link-for-free-coins-in-coin-master_GM406889139.pdfIn PDF document text
    • http://library.umla.ac.id/repository/coin-master-unlimited-spins-hack_GM406889139.pdfIn PDF document text
    • http://library.umla.ac.id//repository/free-modded-minecraft-server-hosting_GM479516143.pdfIn PDF document text
    • http://library.umla.ac.id//repository/appsmobinfo-coinmasterhack-coin-master-hack_GM406889139.pdfIn PDF document text
    • http://library.umla.ac.id//repository/coin-master-hack-tool-v1-9-apk_GM406889139.pdfIn PDF document text
    • http://library.umla.ac.id/repository/free-spin-coin-master-iphone_GM406889139.pdfIn PDF document text
    • http://library.umla.ac.id/repository/electric-state-roblox-hacks_GM431946152.pdfIn PDF document text
    • http://library.umla.ac.id/repository/how-to-hack-roblox-accounts-2021-easy_GM431946152.pdfIn PDF document text
    • http://library.umla.ac.id/repository/how-to-hack-robux_GM431946152.pdfIn PDF document text
    • http://library.umla.ac.id/repository/robux-without-verification_GM431946152.pdfIn PDF document text
    • http://library.umla.ac.id/repository/roblox-top-model-hack_GM431946152.pdfIn PDF document text
    • http://library.umla.ac.id//repository/www-roblox-com-robux_GM431946152.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00002a16.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2A16 22908 bytes
SHA-256: c45a68bfdbdbcdfc21234a65ea5bd479bb29804229b445680b49fe8651baa747
font_01_sfnt_off00005dbd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5DBD 18912 bytes
SHA-256: d0da06c06563365e25d678163380f8c7fa6b55e71fb2929e51ced219e7911ccc

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