Malicious PDF — malware analysis report

Static analysis result for SHA-256 efa579559b8edcd4…

MALICIOUS

PDF

45.4 KB Created: 2021-05-14 23:12:04 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: 3626383f53bf038823b0e6e36b91bc93 SHA-1: c25a691ac2852d8097b3986fcf263bdede7db9ec SHA-256: efa579559b8edcd47349d912b63d29f2fc9f131aedbd8b1faea449ce9d14d38a
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple heuristics indicating malicious redirector links, specifically targeting users with lures for game hacks and generators. The primary malicious URL identified is https://netcdn.xyz/app/406889139/coin-master-hack-pro-game-hack. While no scripts were explicitly extracted, the PDF structure and embedded links suggest an attempt to drive users to malicious sites, likely as part of a phishing or scam campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9507

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.xyz/app/406889139/coin-master-hack-pro-game-hack In PDF document text
    • https://elearning.mtsn2palembang.sch.id/__statics/gudangsoal/files/how-do-i-get-free-robux-on-roblox_GM431946152.pdfIn PDF document text
    • https://elearning.mtsn2palembang.sch.id/__statics/gudangsoal/files/minecraft-free-download-ipad_GM479516143.pdfIn PDF document text
    • https://elearning.mtsn2palembang.sch.id/__statics/gudangsoal/files/how-to-hack-roblox-to-get-free-robux_GM431946152.pdfIn PDF document text
    • https://elearning.mtsn2palembang.sch.id/__statics/gudangsoal/files/how-to-get-free-robux-for-kids_GM431946152.pdfIn PDF document text
    • https://elearning.mtsn2palembang.sch.id/__statics/gudangsoal/files/free-limiteds-roblox_GM431946152.pdfIn PDF document text
    • https://elearning.mtsn2palembang.sch.id/__statics/gudangsoal/files/free-spins-october-28-2021-coin-master_GM406889139.pdfIn PDF document text
    • https://elearning.mtsn2palembang.sch.id/__statics/gudangsoal/files/free-robux-2021_GM431946152.pdfIn PDF document text
    • https://elearning.mtsn2palembang.sch.id/__statics/gudangsoal/files/hackear-coin-master-2021_GM406889139.pdfIn PDF document text
    • https://elearning.mtsn2palembang.sch.id/__statics/gudangsoal/files/coin-master-70-spin-link-today_GM406889139.pdfIn PDF document text
    • https://elearning.mtsn2palembang.sch.id/__statics/gudangsoal/files/coin-master-hack-app_GM406889139.pdfIn PDF document text
    • https://elearning.mtsn2palembang.sch.id/__statics/gudangsoal/files/free-robux-now_GM431946152.pdfIn PDF document text
    • https://elearning.mtsn2palembang.sch.id/__statics/gudangsoal/files/coin-master-free-pin_GM406889139.pdfIn PDF document text
    • https://elearning.mtsn2palembang.sch.id/__statics/gudangsoal/files/coin-master-links-2021_GM406889139.pdfIn PDF document text
    • https://elearning.mtsn2palembang.sch.id/__statics/gudangsoal/files/minecraft-for-free-games_GM479516143.pdfIn PDF document text
    • https://elearning.mtsn2palembang.sch.id/__statics/gudangsoal/files/how-can-you-get-free-robux_GM431946152.pdfIn PDF document text
    • https://elearning.mtsn2palembang.sch.id/__statics/gudangsoal/files/free-gifts-coin-master_GM406889139.pdfIn PDF document text
    • https://elearning.mtsn2palembang.sch.id/__statics/gudangsoal/files/free-coin-master-coins-and-spins_GM406889139.pdfIn PDF document text
    • https://elearning.mtsn2palembang.sch.id/__statics/gudangsoal/files/earn-robux-websites_GM431946152.pdfIn PDF document text
    • https://elearning.mtsn2palembang.sch.id/__statics/gudangsoal/files/how-to-hack-coin-master-with-game-guardian_GM406889139.pdfIn PDF document text
    • https://elearning.mtsn2palembang.sch.id/__statics/gudangsoal/files/make-your-own-minecraft-server-free_GM479516143.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_003_off00004afc.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4AFC 25260 bytes
SHA-256: e337ed07822dbc15620571d35e6c0eafb392317fde0b0a27e3e938b8ca250dfd
font_01_sfnt_off000084ae.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x84AE 3460 bytes
SHA-256: 27f6ee24b80a0c45a340e32027a43d6c3a7853aac96563eed14d58819399f6a8
font_02_sfnt_off00009018.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9018 17868 bytes
SHA-256: 4813da8d3392ee5be528635b0fa067fda57eeb52b921389f98d36b8b85521abf

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