Malicious PDF — malware analysis report

Static analysis result for SHA-256 da339815a0c39591…

MALICIOUS

PDF

34.8 KB Created: 2021-07-06 05:07:52 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: 7360957f0a016cdec57d1007ba164393 SHA-1: 4fe8e8867a62630d0cf55faebea6cd06e3f75069 SHA-256: da339815a0c39591ac4e75ac2abc265b0934d7bc8fe4711f3f3c7df499a16796
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple embedded links that redirect to malicious infrastructure, specifically advertising game hacks and free in-game currency. The primary lure is a 'free generator / game hack' for Coin Master, which redirects to http://netcdn.tw/app/406889139/free-spins-on-coin-master-link-game-hack. This indicates a social engineering tactic to trick users into visiting potentially harmful sites. No scripts were extracted, but the presence of multiple malicious redirector links is a strong indicator of a phishing or scam campaign.

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.tw/app/406889139/free-spins-on-coin-master-link-game-hack In PDF document text
    • http://perpustakaan.pn-tapaktuan.go.id/repository/comment-hack-booga-booga-roblox_GM431946152.pdfIn PDF document text
    • http://perpustakaan.pn-tapaktuan.go.id/repository/join-this-roblox-group-for-free-robux_GM431946152.pdfIn PDF document text
    • http://perpustakaan.pn-tapaktuan.go.id/repository/how-to-hack-roblox-and-get-free-robux_GM431946152.pdfIn PDF document text
    • http://perpustakaan.pn-tapaktuan.go.id/repository/how-to-hack-people-for-real-on-roblox_GM431946152.pdfIn PDF document text
    • http://perpustakaan.pn-tapaktuan.go.id/repository/free-robux-games-on-ipad_GM431946152.pdfIn PDF document text
    • http://perpustakaan.pn-tapaktuan.go.id/repository/roblox-how-to-get-a-free-dominus-hat-2021-august_GM431946152.pdfIn PDF document text
    • http://perpustakaan.pn-tapaktuan.go.id/repository/rbxcity-free-robux_GM431946152.pdfIn PDF document text
    • http://perpustakaan.pn-tapaktuan.go.id/repository/robux-hack-2021_GM431946152.pdfIn PDF document text
    • http://perpustakaan.pn-tapaktuan.go.id/repository/hack-to-get-free-spins-on-coin-master_GM406889139.pdfIn PDF document text
    • http://perpustakaan.pn-tapaktuan.go.id/repository/como-ser-hacker-no-roblox_GM431946152.pdfIn PDF document text
    • http://perpustakaan.pn-tapaktuan.go.id/repository/free-stuff-for-roblox-2021_GM431946152.pdfIn PDF document text
    • http://perpustakaan.pn-tapaktuan.go.id/repository/free-exploit-lvl-7-roblox_GM431946152.pdfIn PDF document text
    • http://perpustakaan.pn-tapaktuan.go.id/repository/free-admin-roblox-download_GM431946152.pdfIn PDF document text
    • http://perpustakaan.pn-tapaktuan.go.id/repository/roblox-buy-robux-free_GM431946152.pdfIn PDF document text
    • http://perpustakaan.pn-tapaktuan.go.id/repository/coin-master-hack-spins-and-coins-unlimited-free_GM406889139.pdfIn PDF document text
    • http://perpustakaan.pn-tapaktuan.go.id/repository/how-to-get-roblox-hair-for-free_GM431946152.pdfIn PDF document text
    • http://perpustakaan.pn-tapaktuan.go.id/repository/eliot-ring-mig-roblox-jailbreak-hack_GM431946152.pdfIn PDF document text
    • http://perpustakaan.pn-tapaktuan.go.id/repository/free-robux-safe_GM431946152.pdfIn PDF document text
    • http://perpustakaan.pn-tapaktuan.go.id/repository/hack-roblox-accounts-2021_GM431946152.pdfIn PDF document text
    • http://perpustakaan.pn-tapaktuan.go.id/repository/800-robux-free-pub_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
stream_002_off00003155.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x3155 23108 bytes
SHA-256: afb216ad0d0f082489abac01e35dcc51991135bda179e220f1931e44afff0849
font_01_sfnt_off0000651e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x651E 18344 bytes
SHA-256: e8d74cdfafe168009f9dc4b70b31a19d6777835fd11eed0a51de0eb2e067c79b

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