Malicious PDF — malware analysis report

Static analysis result for SHA-256 2782efab575db002…

MALICIOUS

PDF

55.2 KB Created: 2021-05-19 08:09:13 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-24
MD5: ccbf764bc27c65348025c906d07a406a SHA-1: a9446524817a25411058c6bfa1ff3481f67cfbc6 SHA-256: 2782efab575db002a0fe32faa642710e70a439f3c51e65404eec42ee4a9bca78
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple embedded links that point to known malicious redirectors, specifically designed to lure users with promises of game hacks and free in-game currency. The primary malicious URL identified is https://netcdn.xyz/app/406889139/free-spin-coin-master-iphone-game-hack. While no scripts were directly extracted, the PDF structure and heuristic firings indicate a malicious redirector workflow, likely intended to deliver a secondary payload or lead to a phishing page.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8531

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/free-spin-coin-master-iphone-game-hack In PDF document text
    • https://fridaytravelnepal.com/userfiles/files/hack-coin-master-spin-android_GM406889139.pdfIn PDF document text
    • https://fridaytravelnepal.com/userfiles/files/what-games-give-you-robux_GM431946152.pdfIn PDF document text
    • https://fridaytravelnepal.com/userfiles/files/coin-master-free-spins-2021-hack_GM406889139.pdfIn PDF document text
    • https://fridaytravelnepal.com/userfiles/files/hack-version-coin-master-apk_GM406889139.pdfIn PDF document text
    • https://fridaytravelnepal.com/userfiles/files/roblox-piano-hack_GM431946152.pdfIn PDF document text
    • https://fridaytravelnepal.com/userfiles/files/free-coins-coin-master-2021_GM406889139.pdfIn PDF document text
    • https://fridaytravelnepal.com/userfiles/files/free-robux-no-verification-2021_GM431946152.pdfIn PDF document text
    • https://fridaytravelnepal.com/userfiles/files/coin-master-hack-software_GM406889139.pdfIn PDF document text
    • https://fridaytravelnepal.com/userfiles/files/how-to-get-free-spins-on-coin-master-iphone_GM406889139.pdfIn PDF document text
    • https://fridaytravelnepal.com/userfiles/files/minecraft-ios-mods_GM479516143.pdfIn PDF document text
    • https://fridaytravelnepal.com/userfiles/files/roblox-games-free_GM431946152.pdfIn PDF document text
    • https://fridaytravelnepal.com/userfiles/files/can-i-get-robux-for-free_GM431946152.pdfIn PDF document text
    • https://fridaytravelnepal.com/userfiles/files/how-to-hack-roblox-to-get-free-robux_GM431946152.pdfIn PDF document text
    • https://fridaytravelnepal.com/userfiles/files/minecraft-com-free_GM479516143.pdfIn PDF document text
    • https://fridaytravelnepal.com/userfiles/files/coin-master-free-spins-link-31-march-2021_GM406889139.pdfIn PDF document text
    • https://fridaytravelnepal.com/userfiles/files/how-to-hack-minecraft-pe_GM479516143.pdfIn PDF document text
    • https://fridaytravelnepal.com/userfiles/files/free-spins-coin-master-app-iphone_GM406889139.pdfIn PDF document text
    • https://fridaytravelnepal.com/userfiles/files/is-minecraft-bedrock-edition-free_GM479516143.pdfIn PDF document text
    • https://fridaytravelnepal.com/userfiles/files/coin-master-hack-app_GM406889139.pdfIn PDF document text
    • https://fridaytravelnepal.com/userfiles/files/robuxy-com-free-robux_GM431946152.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Extracted artifacts 5

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_003_off00004b28.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4B28 26380 bytes
SHA-256: 949e56a6820c19279e60c2de7dd5a2c69ffbfd80cfaa7c6adf709835c3fd1cc6
font_01_sfnt_off00008956.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8956 3152 bytes
SHA-256: 1bd985f7cab931e546a7114ee80c1df3885b38349add8be3963c1931efeb4240
font_02_sfnt_off00009464.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9464 7960 bytes
SHA-256: cf7ae5cf6bef3222f5a26bec705b492fed0278aec6b16ec101aeda46e0edd2b2
font_03_sfnt_off0000a789.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xA789 18052 bytes
SHA-256: 5fb4108eeeaa79d5062a23cf640b88e54c695f2a54e3db1602082ad9a3ce4913
font_04_sfnt_off0000c8ab.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC8AB 4272 bytes
SHA-256: fac9a06ceb5574feb8580c075df3ef69dfbd0efa4947186cfe90f11b68eaafb0

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