Malicious PDF — malware analysis report

Static analysis result for SHA-256 3ff8bac28fc51e0e…

MALICIOUS

PDF

43.8 KB Created: 2021-06-03 08:32:45 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-15
MD5: d48b4981500a91aba49393c65af60dac SHA-1: 69f227efedf2b9721045ce428e80c588c43cc269 SHA-256: 3ff8bac28fc51e0e9ea9bb2541cb07e1cfa802abcf3773b968119ef05286b082
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains embedded links that redirect to a known malicious domain, masquerading as a game hack generator. The document body and heuristics indicate a lure designed to trick users into clicking these links, likely leading to further malicious content or downloads. No scripts were extracted, but the presence of malicious redirector links and the lure strongly suggest a phishing or social engineering attack.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9865

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 https://netcdn.online/app/479516143/how-to-downgrade-minecraft-pe-game-hack In PDF document text
    • https://smark.com.tw/image/data/files/daily-free-spin-and-coin_GM406889139.pdfIn PDF document text
    • https://smark.com.tw/image/data/files/free-robux-no-human-verification-2021_GM431946152.pdfIn PDF document text
    • https://smark.com.tw/image/data/files/free-spins-coin-master-links-app_GM406889139.pdfIn PDF document text
    • https://smark.com.tw/image/data/files/is-roblox-free-on-nintendo-switch_GM431946152.pdfIn PDF document text
    • https://smark.com.tw/image/data/files/fb-coin-master-hack_GM406889139.pdfIn PDF document text
    • https://smark.com.tw/image/data/files/roblox-hair-for-free_GM431946152.pdfIn PDF document text
    • https://smark.com.tw/image/data/files/daily-free-spin-coin-master-link_GM406889139.pdfIn PDF document text
    • https://smark.com.tw/image/data/files/roblox-avatar-maker-free_GM431946152.pdfIn PDF document text
    • https://smark.com.tw/image/data/files/how-to-get-roblox-money_GM431946152.pdfIn PDF document text
    • https://smark.com.tw/image/data/files/free-spins-and-coins-on-coin-master_GM406889139.pdfIn PDF document text
    • https://smark.com.tw/image/data/files/coin-master-twitter_GM406889139.pdfIn PDF document text
    • https://smark.com.tw/image/data/files/how-to-get-free-coins-for-coin-master_GM406889139.pdfIn PDF document text
    • https://smark.com.tw/image/data/files/coin-master-free-spins-promo-code_GM406889139.pdfIn PDF document text
    • https://smark.com.tw/image/data/files/bloxland-earn-free-robux_GM431946152.pdfIn PDF document text
    • https://smark.com.tw/image/data/files/vip-roblox-free_GM431946152.pdfIn PDF document text
    • https://smark.com.tw/image/data/files/coin-master-hack-apk-download-for-android_GM406889139.pdfIn PDF document text
    • https://smark.com.tw/image/data/files/minecraft-112-hacked-client_GM479516143.pdfIn PDF document text
    • https://smark.com.tw/image/data/files/coin-master-online-free-spin_GM406889139.pdfIn PDF document text
    • https://smark.com.tw/image/data/files/all-minecraft-handbooks_GM479516143.pdfIn PDF document text
    • https://smark.com.tw/image/data/files/free-coin-master-coins_GM406889139.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_off000051bd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x51BD 24344 bytes
SHA-256: 541ebaef704672f1a3771d534a559bb132693019a877b43d9478a4503efcca3f
font_01_sfnt_off00008765.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8765 18656 bytes
SHA-256: f671632c41bdcd8896512b89e0179723263a2bce0274879a7730ace5e1a9329c

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