Malicious PDF — malware analysis report

Static analysis result for SHA-256 b20763e37bb0f33b…

MALICIOUS

PDF

33.9 KB Created: 2021-06-26 04:07:00 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-15
MD5: 0e22404e1b35fd460b339082dbd1bb2c SHA-1: d454a0b1d509da1d7c54bd81acdcb235adb7b797 SHA-256: b20763e37bb0f33bad235609ae0d125345eeb81b373a70ac10eda97867581300
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple links to known malicious redirectors, specifically advertising 'game hacks' and 'free currency' to lure victims. The document body and embedded URLs strongly suggest a phishing or scam attempt designed to trick users into visiting potentially harmful websites. No scripts were extracted, but the presence of malicious links and the lure content are sufficient indicators of malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

Heuristics 4

  • 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.
  • 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 http://netcdn.co/app/431946152/how-to-hack-robux-on-android-game-hack In PDF document text
    • https://razredna-nastava.net/files/robux-rewards_GM431946152.pdfIn PDF document text
    • http://razredna-nastava.net/files/coin-master-free-spin-link-new_GM406889139.pdfIn PDF document text
    • https://razredna-nastava.net/files/create-minecraft-server-free_GM479516143.pdfIn PDF document text
    • https://razredna-nastava.net/files/how-to-get-free-spins-on-coin-master-hack_GM406889139.pdfIn PDF document text
    • https://razredna-nastava.net/files/how-to-hack-coin-master-game_GM406889139.pdfIn PDF document text
    • https://razredna-nastava.net/files/mobihack-roblox-hack_GM431946152.pdfIn PDF document text
    • http://razredna-nastava.net/files/coin-master-hack-spins-apk_GM406889139.pdfIn PDF document text
    • http://razredna-nastava.net/files/coin-master-heaven-free-daily-spins_GM406889139.pdfIn PDF document text
    • https://razredna-nastava.net/files/coin-master-hacks-for-gold-cards_GM406889139.pdfIn PDF document text
    • https://razredna-nastava.net/files/free-4-mobile-24-com-robux_GM431946152.pdfIn PDF document text
    • http://razredna-nastava.net/files/free-minecraft-account_GM479516143.pdfIn PDF document text
    • http://razredna-nastava.net/files/free-roblox-printables_GM431946152.pdfIn PDF document text
    • http://razredna-nastava.net/files/hack-tool-for-any-game-on-roblox_GM431946152.pdfIn PDF document text
    • http://razredna-nastava.net/files/free-fans-on-tiktok_GM835599320.pdfIn PDF document text
    • http://razredna-nastava.net/files/coin-master-15-free-spin-link-of-last-5-days_GM406889139.pdfIn PDF document text
    • https://razredna-nastava.net/files/roblox-chrome-extension-hack_GM431946152.pdfIn PDF document text
    • http://razredna-nastava.net/files/you-promised-my-son-free-robux_GM431946152.pdfIn PDF document text
    • https://razredna-nastava.net/files/free-robux-accounts-2021_GM431946152.pdfIn PDF document text
    • https://razredna-nastava.net/files/pastebin-raw-free-robux_GM431946152.pdfIn PDF document text
    • https://razredna-nastava.net/files/minecraft-pocket-edition-download-free-pe-calculator_GM479516143.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
font_00_sfnt_off00002d1e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2D1E 22316 bytes
SHA-256: efab6749ad9fbd5b2b0884a42a17463974454501cd5d83c2a8bdd4e6aec5eae3
font_01_sfnt_off00005ed1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5ED1 19180 bytes
SHA-256: 899471197dc9cacc90fc46b791e270db0906495a0f1d09809b799c5f2c931403

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