Malicious PDF — malware analysis report

Static analysis result for SHA-256 0aa439f49dc53f3c…

MALICIOUS

PDF

46.4 KB Created: 2021-06-08 20:05:44 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-31
MD5: 561973cddf36be3c10a53188ccd8889d SHA-1: 05f72c74b5ca9abd06f4ac893508e8cac4d0036e SHA-256: 0aa439f49dc53f3cf0bbaf5ff4feaad35f23e97be3e872ebe7356d685ecfa4ce
200 Risk Score

Malware Insights

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

This PDF document contains multiple links to known malicious redirectors and is designed to trick users with a fake CAPTCHA or human verification prompt. The primary lure appears to be related to 'game hacks' and 'free robux', suggesting a scam or malware distribution attempt. While no scripts were explicitly extracted, the PDF structure and embedded URLs strongly indicate an attempt to redirect the user to malicious content, likely for exploitation or further payload delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9832

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.tw/app/431946152/robux-plus-hack-game-hack In PDF document text
    • https://e-learning-man2jakarta.com/__statics/gudangsoal/files/coin-master-free-coins-links-2021_GM406889139.pdfIn PDF document text
    • https://e-learning-man2jakarta.com/__statics/gudangsoal/files/www-roblox-com-robux-free_GM431946152.pdfIn PDF document text
    • https://e-learning-man2jakarta.com/__statics/gudangsoal/files/show-me-how-to-get-free-robux_GM431946152.pdfIn PDF document text
    • https://e-learning-man2jakarta.com/__statics/gudangsoal/files/coin-master-free-spins-16-04-19_GM406889139.pdfIn PDF document text
    • https://e-learning-man2jakarta.com/__statics/gudangsoal/files/coin-master-spin-hack-pc_GM406889139.pdfIn PDF document text
    • https://e-learning-man2jakarta.com/__statics/gudangsoal/files/roblox-jailbreak-hack_GM431946152.pdfIn PDF document text
    • https://e-learning-man2jakarta.com/__statics/gudangsoal/files/how-do-you-get-free-robux_GM431946152.pdfIn PDF document text
    • https://e-learning-man2jakarta.com/__statics/gudangsoal/files/robux-com-free_GM431946152.pdfIn PDF document text
    • https://e-learning-man2jakarta.com/__statics/gudangsoal/files/free-minecraft-mods-for-xbox-one_GM479516143.pdfIn PDF document text
    • https://e-learning-man2jakarta.com/__statics/gudangsoal/files/jailbreak-script_GM431946152.pdfIn PDF document text
    • https://e-learning-man2jakarta.com/__statics/gudangsoal/files/coin-master-card-hack-2021_GM406889139.pdfIn PDF document text
    • https://e-learning-man2jakarta.com/__statics/gudangsoal/files/coin-master-free-gifts_GM406889139.pdfIn PDF document text
    • https://e-learning-man2jakarta.com/__statics/gudangsoal/files/coin-master-claim-spins_GM406889139.pdfIn PDF document text
    • https://e-learning-man2jakarta.com/__statics/gudangsoal/files/get-free-robux-generator_GM431946152.pdfIn PDF document text
    • https://e-learning-man2jakarta.com/__statics/gudangsoal/files/how-to-get-free-robux-without-downloading-apps_GM431946152.pdfIn PDF document text
    • https://e-learning-man2jakarta.com/__statics/gudangsoal/files/free-spins-for-coin-master-hack_GM406889139.pdfIn PDF document text
    • https://e-learning-man2jakarta.com/__statics/gudangsoal/files/how-to-get-free-robux-with-cheat-engine-67_GM431946152.pdfIn PDF document text
    • https://e-learning-man2jakarta.com/__statics/gudangsoal/files/hack-site-for-roblox_GM431946152.pdfIn PDF document text
    • https://e-learning-man2jakarta.com/__statics/gudangsoal/files/how-to-get-free-robux-2021-easy_GM431946152.pdfIn PDF document text
    • https://e-learning-man2jakarta.com/__statics/gudangsoal/files/free-spin-coin-master-2021-link_GM406889139.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
stream_004_off00005536.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x5536 26776 bytes
SHA-256: b36604767e49917c69ceef6e8ab47cd80326b66ad95852de7e445ec0ba153ff1
font_01_sfnt_off0000926c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x926C 18476 bytes
SHA-256: 89d6f941eec6f0c0112b377f42b8c613398e004507010f4cee634342c01ff17a

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