Malicious PDF — malware analysis report

Static analysis result for SHA-256 41eb6f2e48d03272…

MALICIOUS

PDF

41.1 KB Created: 2021-05-20 01:15:08 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-08-25
MD5: 493ea9d2d9e874c7a0ca30b931bc846b SHA-1: 7f4355e5ed8a593ea463c460827511c432db133a SHA-256: 41eb6f2e48d03272fb3850d990d6f8491f2331d131f65552a65ccf31edb31c97
200 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple links to known malicious redirectors and lures users with fake CAPTCHA prompts and offers of game hacks. The embedded URLs are designed to trick users into downloading further malicious content or visiting phishing sites. The document's content and heuristics strongly suggest a phishing or scam attempt, likely delivered as a spearphishing attachment.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9971

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/835599320/free-500-tiktok-views-game-hack In PDF document text
    • https://schulzpressetext.de/images/minecraft-pe-apk-download_GM479516143.pdfIn PDF document text
    • https://schulzpressetext.de/images/free-cracked-minecraft-server-hosting_GM479516143.pdfIn PDF document text
    • https://schulzpressetext.de/images/coin-master-hack-app-2021_GM406889139.pdfIn PDF document text
    • https://schulzpressetext.de/images/coin-master-daily-free-spins-link-app_GM406889139.pdfIn PDF document text
    • https://schulzpressetext.de/images/what-tiktok-free-likes_GM835599320.pdfIn PDF document text
    • https://schulzpressetext.de/images/how-do-u-get-robux_GM431946152.pdfIn PDF document text
    • https://schulzpressetext.de/images/free-hair-roblox-boy_GM431946152.pdfIn PDF document text
    • https://schulzpressetext.de/images/free-4-tiktokcom_GM835599320.pdfIn PDF document text
    • https://schulzpressetext.de/images/minecraft-free_GM479516143.pdfIn PDF document text
    • https://schulzpressetext.de/images/minecraft-dungeons-free-download_GM479516143.pdfIn PDF document text
    • https://schulzpressetext.de/images/spin-hack-for-coin-master_GM406889139.pdfIn PDF document text
    • https://schulzpressetext.de/images/free-robux-for-free_GM431946152.pdfIn PDF document text
    • https://schulzpressetext.de/images/free-robux-app-2021_GM431946152.pdfIn PDF document text
    • https://schulzpressetext.de/images/daily-free-spins-coin-master-heaven_GM406889139.pdfIn PDF document text
    • https://schulzpressetext.de/images/how-to-win-free-robux_GM431946152.pdfIn PDF document text
    • https://schulzpressetext.de/images/free-robux-no-gift-card_GM431946152.pdfIn PDF document text
    • https://schulzpressetext.de/images/coin-master-daily-free-spins-link_GM406889139.pdfIn PDF document text
    • https://schulzpressetext.de/images/coin-master-date-and-time-hack_GM406889139.pdfIn PDF document text
    • https://schulzpressetext.de/images/coin-master-free-cards-hack_GM406889139.pdfIn PDF document text
    • https://schulzpressetext.de/images/earn-free-robux-on-roblox_GM431946152.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_003_off0000459f.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x459F 24692 bytes
SHA-256: e9e461f45bad775e5258370e7b7e6cf508c892ac25dd0b850d87b175ca20d4a4
font_01_sfnt_off00007ec0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7EC0 18060 bytes
SHA-256: 74788621514fb16adc4021deb384de90e3f7f45b7531d3fcfbda90cb884e906e

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