Malicious PDF — malware analysis report

Static analysis result for SHA-256 657114bc9a7912ab…

MALICIOUS

PDF

45.1 KB Created: 2021-05-16 19:34:01 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-15
MD5: effbad77e3b24884b3ba5c2a7f5b6c88 SHA-1: 5331c69c24462c78f6c01521b9ed4543f852d1de SHA-256: 657114bc9a7912abf29c49f5821917e6dd1f89c041e79cc13a2e54f8b94c2a57
200 Risk Score

Malware Insights

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

The PDF document contains a fake CAPTCHA lure, designed to trick users into interacting with the document. It also embeds external URLs, such as 'https://netcdn.xyz/app/406889139/coin-master-fb-free-spins-link-game-hack', which likely lead to malicious content or further downloads. The presence of these elements strongly suggests an attempt to exploit the user through social engineering and potentially deliver a secondary payload.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9621

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/406889139/coin-master-fb-free-spins-link-game-hack In PDF document text
    • http://gods-own.org/images/coin-master-free-spin-generator-without-human-verification_GM406889139.pdfIn PDF document text
    • http://gods-own.org/images/roblox-com-free-robux_GM431946152.pdfIn PDF document text
    • http://gods-own.org/images/free-spins-on-coin-master-generator_GM406889139.pdfIn PDF document text
    • http://gods-own.org/images/minecraft-auto-miner-hack_GM479516143.pdfIn PDF document text
    • http://gods-own.org/images/free-robux-generator_GM431946152.pdfIn PDF document text
    • http://gods-own.org/images/https-iosgodscom-topic-20218flipmastercoinshack_GM406889139.pdfIn PDF document text
    • http://gods-own.org/images/rbx-robux_GM431946152.pdfIn PDF document text
    • http://gods-own.org/images/free-robux-generator-com-roblox-hack_GM431946152.pdfIn PDF document text
    • http://gods-own.org/images/cm-free-spins-and-coins_GM406889139.pdfIn PDF document text
    • http://gods-own.org/images/how-to-get-unlimited-robux-2021_GM431946152.pdfIn PDF document text
    • http://gods-own.org/images/how-to-get-robux-for-free-2021_GM431946152.pdfIn PDF document text
    • http://gods-own.org/images/coin-master-free-spins-and-coins-daily-links_GM406889139.pdfIn PDF document text
    • http://gods-own.org/images/free-robux-by-watching-ads_GM431946152.pdfIn PDF document text
    • http://gods-own.org/images/roblox-www-com_GM431946152.pdfIn PDF document text
    • http://gods-own.org/images/hacks-to-get-free-robux_GM431946152.pdfIn PDF document text
    • http://gods-own.org/images/roblox-report-hacker_GM431946152.pdfIn PDF document text
    • http://gods-own.org/images/free-spin-hack-coin-master-2021_GM406889139.pdfIn PDF document text
    • http://gods-own.org/images/how-to-get-free-chest-in-coin-master_GM406889139.pdfIn PDF document text
    • http://gods-own.org/images/how-to-get-free-spins-on-coin-master-hack_GM406889139.pdfIn PDF document text
    • http://gods-own.org/images/how-to-download-minecraft-for-free-on-android_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_003_off000048d4.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x48D4 24948 bytes
SHA-256: 351d3cc433878998ee81b0ae8f4c8a56a37975a51670f4b475e7061fd7f858fe
font_01_sfnt_off000081f9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x81F9 3380 bytes
SHA-256: 1dd933c112880b232546f3aab6a17784a8f412d39fd551cc6eb31c5a04c3ce57
font_02_sfnt_off00008de2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8DE2 18212 bytes
SHA-256: 327fc99e7b5c2067b4ecc0387a10766c92f977f0ec9955a16f9230cf80a034c4