Malicious PDF — malware analysis report

Static analysis result for SHA-256 485a9bf599357f28…

MALICIOUS

PDF

39.9 KB Created: 2021-05-23 00:36:38 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-11-21
MD5: 4615a352f492c21e75edb28bb2c87281 SHA-1: f8fe3b7c0cd02b4b8a7ad220cfe70bb7d7807fa0 SHA-256: 485a9bf599357f287edf2e7853cdbadd82eb5ef96b4e9a2aec00ede760254923
200 Risk Score

Malware Insights

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

The PDF document uses a lure related to "game hacks" and "generators" to trick users into clicking malicious links. It displays a fake CAPTCHA or human verification prompt, a common tactic to coerce users into executing further actions. The primary malicious URL identified is https://netcdn.xyz/app/431946152/how-to-hack-a-roblox-account-easy-game-hack, which is linked to known malicious redirector infrastructure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8068

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-to-hack-a-roblox-account-easy-game-hack In PDF document text
    • http://ghhs.com.my/images/roblox-arsenal-hack_GM431946152.pdfIn PDF document text
    • http://ghhs.com.my/images/minecraft-life-hacks_GM479516143.pdfIn PDF document text
    • http://ghhs.com.my/images/free-tiktok-followers-no-survey-or-verification_GM835599320.pdfIn PDF document text
    • http://ghhs.com.my/images/coin-master-coins-free_GM406889139.pdfIn PDF document text
    • http://ghhs.com.my/images/how-many-levels-in-coin-master_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_002_off000030e4.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x30E4 25516 bytes
SHA-256: e238f545f844f475093b89286aec72e576fed615bfa8f19a0dd021656d90f7c6
font_01_sfnt_off00006bfc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6BFC 3884 bytes
SHA-256: 40b61f8938bd710dc29dc58ba3fde91c245a6a69596ec569b4d27c769ca417cf
font_02_sfnt_off000078a3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x78A3 18772 bytes
SHA-256: f0aa2a8f008262e8aa636f08cdffff7c9568ae6e0bf5f389be1472b9a6879674

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