Malicious PDF — malware analysis report

Static analysis result for SHA-256 6f76a4cbe3a53d11…

MALICIOUS

PDF

33.1 KB Created: 2021-06-18 14:04:29 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: e38f14f787d5dfc381d71be5f05f4f1c SHA-1: c3ffc340822802b4e00715bd146e091ff1ac0564 SHA-256: 6f76a4cbe3a53d11b2ea109db61971e23bed8e3a81bba2d903b11e401cbcc3cf
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document contains multiple links that redirect to malicious infrastructure, specifically promoting 'game hacks' and 'free generators' for popular games. The primary lure is a link to 'how-to-get-free-faces-on-roblox-ios-game-hack', which is hosted on a known malicious redirector. The document body text reinforces this lure by mentioning free Robux and game hacks, aiming to trick users into clicking the malicious links. No scripts were extracted, but the embedded URLs and the nature of the lures strongly indicate a phishing or scam attempt.

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-get-free-faces-on-roblox-ios-game-hack In PDF document text
    • https://foc.vn/public/upload/files/links-to-get-free-spins-on-coin-master_GM406889139.pdfIn PDF document text
    • https://foc.vn/public/upload/files/free-spins-coin-master_GM406889139.pdfIn PDF document text
    • https://foc.vn/public/upload/files/free-2021-robux_GM431946152.pdfIn PDF document text
    • https://foc.vn/public/upload/files/one-piece-open-seas-hack-roblox_GM431946152.pdfIn PDF document text
    • https://foc.vn/public/upload/files/how-to-get-free-robux-for-free_GM431946152.pdfIn PDF document text
    • https://foc.vn/public/upload/files/coin-master-spin-pattern_GM406889139.pdfIn PDF document text
    • https://foc.vn/public/upload/files/get-free-roblox-gift-cards_GM431946152.pdfIn PDF document text
    • https://foc.vn/public/upload/files/coin-master-free-2021-spin-link_GM406889139.pdfIn PDF document text
    • https://foc.vn/public/upload/files/roblox-meepcity-games-for-free_GM431946152.pdfIn PDF document text
    • https://foc.vn/public/upload/files/play-minecraft-pocket-edition-for-free_GM479516143.pdfIn PDF document text
    • https://foc.vn/public/upload/files/hack-coin-master-apk-31_GM406889139.pdfIn PDF document text
    • https://foc.vn/public/upload/files/robux-page_GM431946152.pdfIn PDF document text
    • https://foc.vn/public/upload/files/minecraft-bedrock-hacks_GM479516143.pdfIn PDF document text
    • https://foc.vn/public/upload/files/coin-master-daily-free-spin-and-coin_GM406889139.pdfIn PDF document text
    • https://foc.vn/public/upload/files/coin-master-hack-no-survey-2021_GM406889139.pdfIn PDF document text
    • https://foc.vn/public/upload/files/free-links-for-coin-master_GM406889139.pdfIn PDF document text
    • https://foc.vn/public/upload/files/roblox-free-hair-codes_GM431946152.pdfIn PDF document text
    • https://foc.vn/public/upload/files/how-to-get-free-robux-codes_GM431946152.pdfIn PDF document text
    • https://foc.vn/public/upload/files/coin-master-free-cards_GM406889139.pdfIn PDF document text
    • https://foc.vn/public/upload/files/free-robux-no-gift-card_GM431946152.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
font_00_sfnt_off00002cad.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2CAD 21656 bytes
SHA-256: 37fdcf46c624a29120c183cc8956de76619abef84e5c47789fbfd96eaee39118
font_01_sfnt_off00005c6e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5C6E 18920 bytes
SHA-256: c58aa6620b6722ffe9cb9d961de0a996aabbd8371d9a3883ad651d3cdf875720

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