Malicious PDF — malware analysis report

Static analysis result for SHA-256 f43ce1e2aa778f0b…

MALICIOUS

PDF

47.0 KB Created: 2021-06-09 05:45:21 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: 9d126af0fcd5cadfb8fa9e726556bea6 SHA-1: 1cad1734ecdfd0abb744c5d54f0b9dba4a7cf952 SHA-256: f43ce1e2aa778f0b9fa7f6bef808197144608ce33c9b4286917ef1284b8ea95b
200 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF document contains multiple links that redirect to malicious infrastructure, masquerading as game hacks and impersonating Microsoft to trick users into clicking. The ML classifier strongly indicated maliciousness, and the embedded URLs are associated with known malicious redirectors. No scripts were extracted from this sample, but the document's structure and embedded links suggest it is designed to lead the user to a compromised site, likely for credential harvesting or further malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9832

Heuristics 5

  • 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.
  • Brand-impersonation credential phishing lure high SE_BRAND_CREDENTIAL_PHISH
    Document impersonates a well-known consumer brand and uses account-security / verification language ('unusual activity', 'account on hold', 'verify your account') to steer the reader to a credential-harvesting link. Corroborated by: call-to-action link host does not match the impersonated brand: https://netcdn.tw/app/431946152/how-to-hack-roblox-on-chat-bar-game-hack.
  • 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.tw/app/431946152/how-to-hack-roblox-on-chat-bar-game-hack In PDF document text
    • http://pjj.mtsntpi.my.id/__statics/gudangsoal/files/free-robux-no-verify_GM431946152.pdfIn PDF document text
    • http://pjj.mtsntpi.my.id/__statics/gudangsoal/files/how-to-hack-someones-roblox-account_GM431946152.pdfIn PDF document text
    • http://pjj.mtsntpi.my.id/__statics/gudangsoal/files/coin-master-hack-ios-no-jailbreak_GM406889139.pdfIn PDF document text
    • http://pjj.mtsntpi.my.id/__statics/gudangsoal/files/coin-master-free-spin-link-daily_GM406889139.pdfIn PDF document text
    • http://pjj.mtsntpi.my.id/__statics/gudangsoal/files/roblox-hack-ga_GM431946152.pdfIn PDF document text
    • http://pjj.mtsntpi.my.id/__statics/gudangsoal/files/roblox-com-hack_GM431946152.pdfIn PDF document text
    • http://pjj.mtsntpi.my.id/__statics/gudangsoal/files/coin-master-link-for-spins_GM406889139.pdfIn PDF document text
    • http://pjj.mtsntpi.my.id/__statics/gudangsoal/files/coin-master-apk-hack-2021_GM406889139.pdfIn PDF document text
    • http://pjj.mtsntpi.my.id/__statics/gudangsoal/files/password-free-roblox-accounts_GM431946152.pdfIn PDF document text
    • http://pjj.mtsntpi.my.id/__statics/gudangsoal/files/coin-master-gold-cards-free-link_GM406889139.pdfIn PDF document text
    • http://pjj.mtsntpi.my.id/__statics/gudangsoal/files/links-to-free-spins-on-coin-master_GM406889139.pdfIn PDF document text
    • http://pjj.mtsntpi.my.id/__statics/gudangsoal/files/free-spins-in-coin-master-without-human-verification_GM406889139.pdfIn PDF document text
    • http://pjj.mtsntpi.my.id/__statics/gudangsoal/files/free-download-coin-master_GM406889139.pdfIn PDF document text
    • http://pjj.mtsntpi.my.id/__statics/gudangsoal/files/free-robux-2021-no-verification_GM431946152.pdfIn PDF document text
    • http://pjj.mtsntpi.my.id/__statics/gudangsoal/files/mobihack-roblox-hack_GM431946152.pdfIn PDF document text
    • http://pjj.mtsntpi.my.id/__statics/gudangsoal/files/free-robux-apk_GM431946152.pdfIn PDF document text
    • http://pjj.mtsntpi.my.id/__statics/gudangsoal/files/roblox-weird_GM431946152.pdfIn PDF document text
    • http://pjj.mtsntpi.my.id/__statics/gudangsoal/files/how-to-get-minecraft-for-free-on-tablet_GM479516143.pdfIn PDF document text
    • http://pjj.mtsntpi.my.id/__statics/gudangsoal/files/http-bitly-coin-master-free-2021-spins_GM406889139.pdfIn PDF document text
    • http://pjj.mtsntpi.my.id/__statics/gudangsoal/files/blox-best-robux_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_004_off000055e7.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x55E7 27564 bytes
SHA-256: 93a641c1b77cc7efcfc89ff62bb9ede1980a20be82f00086c1a00fc0c8686d61
font_01_sfnt_off0000944f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x944F 18616 bytes
SHA-256: a9bd8e0f6df15f8f0cc070975e7b732f300be1abc09bf289ff17e7a6d97a7e30

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