Malicious PDF — malware analysis report

Static analysis result for SHA-256 1f5ffcd8977f710d…

MALICIOUS

PDF

34.8 KB Created: 2021-07-07 07:24:15 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: f4160aea1837cb8b59d81dfa2c531883 SHA-1: 81173b29a67a136b7923e54510d0ee4da968a534 SHA-256: 1f5ffcd8977f710d2faa5121bd0d4b446b0e4fd2054a5503285dd3c5d3ee7981
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document contains multiple links to malicious redirectors and further malicious PDFs, disguised as game hacks and generators. The primary lure is for 'free spins on Coin Master' and 'free Robux', which is a common social engineering tactic. The document's structure and embedded URLs indicate it is designed to lead users to potentially harmful content, likely for credential harvesting or malware distribution.

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-2021-game-hack In PDF document text
    • http://ppl.man2kediri.net/__statics/gudangsoal/files/free-robux-only-username_GM431946152.pdfIn PDF document text
    • http://ppl.man2kediri.net/__statics/gudangsoal/files/coin-master-hack-download-2021_GM406889139.pdfIn PDF document text
    • http://ppl.man2kediri.net/__statics/gudangsoal/files/coin-master-spin-cheat_GM406889139.pdfIn PDF document text
    • http://ppl.man2kediri.net/__statics/gudangsoal/files/make-robux-free_GM431946152.pdfIn PDF document text
    • http://ppl.man2kediri.net/__statics/gudangsoal/files/coin-master-free-link-facebook_GM406889139.pdfIn PDF document text
    • http://ppl.man2kediri.net/__statics/gudangsoal/files/free-account-roblox-with-robux_GM431946152.pdfIn PDF document text
    • http://ppl.man2kediri.net/__statics/gudangsoal/files/minecraft-bedrock-free-server-hosting_GM479516143.pdfIn PDF document text
    • http://ppl.man2kediri.net/__statics/gudangsoal/files/hack-copy-game-roblox_GM431946152.pdfIn PDF document text
    • http://ppl.man2kediri.net/__statics/gudangsoal/files/real-free-robux-generator_GM431946152.pdfIn PDF document text
    • http://ppl.man2kediri.net/__statics/gudangsoal/files/eupo-fun-roblox-hack_GM431946152.pdfIn PDF document text
    • http://ppl.man2kediri.net/__statics/gudangsoal/files/how-to-hack-roblox-accounts-2021-easy_GM431946152.pdfIn PDF document text
    • http://ppl.man2kediri.net/__statics/gudangsoal/files/free-roblox-admin-accounts_GM431946152.pdfIn PDF document text
    • http://ppl.man2kediri.net/__statics/gudangsoal/files/free-minecraft-java-account_GM479516143.pdfIn PDF document text
    • http://ppl.man2kediri.net/__statics/gudangsoal/files/links-for-coin-master-free-spins_GM406889139.pdfIn PDF document text
    • http://ppl.man2kediri.net/__statics/gudangsoal/files/get-free-spins-on-coin-master-links_GM406889139.pdfIn PDF document text
    • http://ppl.man2kediri.net/__statics/gudangsoal/files/roblox-robux-codes-2021_GM431946152.pdfIn PDF document text
    • http://ppl.man2kediri.net/__statics/gudangsoal/files/free-robux-offers_GM431946152.pdfIn PDF document text
    • http://ppl.man2kediri.net/__statics/gudangsoal/files/how-to-get-minecraft-for-free_GM479516143.pdfIn PDF document text
    • http://ppl.man2kediri.net/__statics/gudangsoal/files/minecraft-for-free-on-phone_GM479516143.pdfIn PDF document text
    • http://ppl.man2kediri.net/__statics/gudangsoal/files/minecraft-ps4-code-free_GM479516143.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_off00003105.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x3105 22888 bytes
SHA-256: 9de73cd37c212725550961bb38ad3c87413151eb14c3ab39f06da52d49dd800f
font_01_sfnt_off0000648f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x648F 18576 bytes
SHA-256: 592e144e19b3a0fb235169ea68d8700deb7f7882d554043d1d7a76374456614b

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