Malicious PDF — malware analysis report

Static analysis result for SHA-256 f938acd66d64af63…

MALICIOUS

PDF

33.2 KB Created: 2021-06-22 20:38:00 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-15
MD5: a843bc3a52200767d88a4f9f796a42ea SHA-1: 0200b2b9fbf480b2e0b6f98517d4bcb07e3d42cb SHA-256: f938acd66d64af63e8f866c4958404f920d713d2a122975b13cd1da90adfbcd8
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains links that lead to a known malicious redirector, disguised as a lure for game hacks. The document body explicitly mentions 'how to hack musical chairs in Roblox' and includes a URL pointing to a generator. This indicates a phishing or scam attempt to redirect users to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9824

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-musical-chairs-in-roblox-game-hack In PDF document text
    • https://www.alamrayabali.com/assets/CKImages/files/hack-defense-towers-dinero-infinito-roblox_GM431946152.pdfIn PDF document text
    • https://www.alamrayabali.com/assets/CKImages/files/coin-master-free-spins-without-verification_GM406889139.pdfIn PDF document text
    • https://www.alamrayabali.com/assets/CKImages/files/coin-master-free-spin-codes_GM406889139.pdfIn PDF document text
    • https://www.alamrayabali.com/assets/CKImages/files/roblox-themepark-tycoon-hacked_GM431946152.pdfIn PDF document text
    • https://www.alamrayabali.com/assets/CKImages/files/coin-master-free-spins-hack-but-no-surveys_GM406889139.pdfIn PDF document text
    • https://www.alamrayabali.com/assets/CKImages/files/coin-master-ids-for-free-spins_GM406889139.pdfIn PDF document text
    • https://www.alamrayabali.com/assets/CKImages/files/free-robux-on-iphone_GM431946152.pdfIn PDF document text
    • https://www.alamrayabali.com/assets/CKImages/files/free-spins-and-coins-coin-master-2021_GM406889139.pdfIn PDF document text
    • https://www.alamrayabali.com/assets/CKImages/files/coin-master-free-spins-link-2021-today_GM406889139.pdfIn PDF document text
    • https://www.alamrayabali.com/assets/CKImages/files/free-custom-minecraft-skins_GM479516143.pdfIn PDF document text
    • https://www.alamrayabali.com/assets/CKImages/files/how-to-hack-someones-account-on-roblox_GM431946152.pdfIn PDF document text
    • https://www.alamrayabali.com/assets/CKImages/files/how-to-get-400-robux-for-free-2021_GM431946152.pdfIn PDF document text
    • https://www.alamrayabali.com/assets/CKImages/files/roblox-free-robux-net_GM431946152.pdfIn PDF document text
    • https://www.alamrayabali.com/assets/CKImages/files/coin-master-free-spin-and-coins-links-home_GM406889139.pdfIn PDF document text
    • https://www.alamrayabali.com/assets/CKImages/files/how-to-hack-robux_GM431946152.pdfIn PDF document text
    • https://www.alamrayabali.com/assets/CKImages/files/free-games-like-roblox_GM431946152.pdfIn PDF document text
    • https://www.alamrayabali.com/assets/CKImages/files/free-robux-games-that-actually-work-2021_GM431946152.pdfIn PDF document text
    • https://www.alamrayabali.com/assets/CKImages/files/roblox-2021-hack_GM431946152.pdfIn PDF document text
    • https://www.alamrayabali.com/assets/CKImages/files/roblox-free-robux-website_GM431946152.pdfIn PDF document text
    • https://www.alamrayabali.com/assets/CKImages/files/free-robux-download_GM431946152.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Related samples 7

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_off00002af7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2AF7 22136 bytes
SHA-256: d21c737887eb751ac352eaf7a0c9dd47434deabe2539ac275f314dca92c2977e
font_01_sfnt_off00005c34.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5C34 19440 bytes
SHA-256: 2410d0a967d4b64798102ae21cb8914684492f1737575e845bdddb96f98446d7

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