Malicious PDF — malware analysis report

Static analysis result for SHA-256 f6d35229e63dfc9b…

MALICIOUS

PDF

43.2 KB Created: 2021-05-12 07:03:28 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-11-24
MD5: 1637e1de725516b204acec7d17df771b SHA-1: 53f37e875b3e36fa970c3782916b1d68613e4903 SHA-256: f6d35229e63dfc9be708c733b785e9840115a1d00f267f0420a0becda3febdf8
200 Risk Score

Malware Insights

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

This PDF document employs a common lure for game-related cheats and hacks, specifically mentioning 'Coin Master'. It presents a fake CAPTCHA to coerce users into interacting with malicious links. The embedded URLs, such as https://netcdn.xyz/app/406889139/coin-master-free-cards-link-2021-game-hack, are identified as malicious redirectors, likely leading to further exploitation or malware download. The document's structure and the presence of multiple redirector links strongly suggest a phishing or social engineering attack aimed at driving traffic to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9969

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-free-cards-link-2021-game-hack In PDF document text
    • http://ptts.pl/images/coin-master-hack-tool_GM406889139.pdfIn PDF document text
    • http://ptts.pl/images/free-robux-without-verification-or-survey_GM431946152.pdfIn PDF document text
    • http://ptts.pl/images/coin-master-free-spins-facebook_GM406889139.pdfIn PDF document text
    • http://ptts.pl/images/twitter-coin-master-free-spins-link_GM406889139.pdfIn PDF document text
    • http://ptts.pl/images/coin-master-free-spins-link_GM406889139.pdfIn PDF document text
    • http://ptts.pl/images/coin-master-free-link-2021_GM406889139.pdfIn PDF document text
    • http://ptts.pl/images/minecraft-free-download-android-apk-014-0_GM479516143.pdfIn PDF document text
    • http://ptts.pl/images/free-coin-master-app_GM406889139.pdfIn PDF document text
    • http://ptts.pl/images/clients-minecraft_GM479516143.pdfIn PDF document text
    • http://ptts.pl/images/free-minecraft-gift-card_GM479516143.pdfIn PDF document text
    • http://ptts.pl/images/claim-roblox_GM431946152.pdfIn PDF document text
    • http://ptts.pl/images/how-to-get-free-robux-2021_GM431946152.pdfIn PDF document text
    • http://ptts.pl/images/free-roblox-clothes-templates_GM431946152.pdfIn PDF document text
    • http://ptts.pl/images/free-robux-giveaway-live_GM431946152.pdfIn PDF document text
    • http://ptts.pl/images/how-to-get-free-robux-on-roblox_GM431946152.pdfIn PDF document text
    • http://ptts.pl/images/coin-master-apk-hack-3527_GM406889139.pdfIn PDF document text
    • http://ptts.pl/images/minecraft-free-download-windows-10_GM479516143.pdfIn PDF document text
    • http://ptts.pl/images/coin-master-free-spins-hack-no-human-verification_GM406889139.pdfIn PDF document text
    • http://ptts.pl/images/what-is-coin-master-app_GM406889139.pdfIn PDF document text
    • http://ptts.pl/images/coin-master-connection-lost_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_003_off00004a14.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4A14 26432 bytes
SHA-256: 13d97359a719d5603b279fb067c5c4dabebd5f1ccd3f22ec327361fad672e30a
font_01_sfnt_off000085d9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x85D9 18456 bytes
SHA-256: b51790488d60a3c79421cfddad0a6ae9f074b26b8d27a704dda1d2d7bad48ec0

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