Malicious PDF — malware analysis report

Static analysis result for SHA-256 1552a326ac6bf7d1…

MALICIOUS

PDF

51.5 KB Created: 2021-06-09 16:56:26 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: e007d238602833f3cf8a6d479d3d6cc9 SHA-1: 840b8d57b1d9b9d422e25813bfcd87416f3da1a9 SHA-256: 1552a326ac6bf7d1d78a00dc2f875a8e53180a84c7e3e5b2a4c772c73ca8c5e7
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple links to known malicious redirectors, specifically promoting 'free game hacks' for Roblox. The document body, though heavily obfuscated, contains references to these lures and the malicious URL. The ML classifier also strongly indicated maliciousness. The primary attack vector appears to be social engineering via a fake generator lure to redirect users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9685

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.tw/app/431946152/glitch-free-game-pass-roblox-game-hack In PDF document text
    • https://dirigentigiustizia.it/images/roblox-hack-game_GM431946152.pdfIn PDF document text
    • https://dirigentigiustizia.it/images/coin-master-spin-hack_GM406889139.pdfIn PDF document text
    • https://dirigentigiustizia.it/images/how-to-hack-to-get-robux_GM431946152.pdfIn PDF document text
    • https://dirigentigiustizia.it/images/buy-robux-free_GM431946152.pdfIn PDF document text
    • https://dirigentigiustizia.it/images/free-robux-generator-2021-gaming_GM431946152.pdfIn PDF document text
    • https://dirigentigiustizia.it/images/coin-master-hack-version-download_GM406889139.pdfIn PDF document text
    • https://dirigentigiustizia.it/images/free-robux-hack-no-human-verification-or-survey_GM431946152.pdfIn PDF document text
    • https://dirigentigiustizia.it/images/coin-master-free-coins--spins_GM406889139.pdfIn PDF document text
    • https://dirigentigiustizia.it/images/free-coins-coin-master-hack_GM406889139.pdfIn PDF document text
    • https://dirigentigiustizia.it/images/free-robux-generator-com-roblox-hack_GM431946152.pdfIn PDF document text
    • https://dirigentigiustizia.it/images/how-to-get-a-cape-in-minecraft-for-free_GM479516143.pdfIn PDF document text
    • https://dirigentigiustizia.it/images/coin-master-server-hack_GM406889139.pdfIn PDF document text
    • https://dirigentigiustizia.it/images/how-do-you-hack-roblox_GM431946152.pdfIn PDF document text
    • https://dirigentigiustizia.it/images/50-robux-free-codes_GM431946152.pdfIn PDF document text
    • https://dirigentigiustizia.it/images/how-to-traversed-wall-roblox-cheat_GM431946152.pdfIn PDF document text
    • https://dirigentigiustizia.it/images/coin-master-hacks-to-get-spins_GM406889139.pdfIn PDF document text
    • https://dirigentigiustizia.it/images/how-can-i-get-free-spins-on-coin-master_GM406889139.pdfIn PDF document text
    • https://dirigentigiustizia.it/images/coin-free-master_GM406889139.pdfIn PDF document text
    • https://dirigentigiustizia.it/images/tiktok-free-wifi_GM835599320.pdfIn PDF document text
    • https://dirigentigiustizia.it/images/hack-coin-master-spin-android_GM406889139.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_004_off000051a4.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x51A4 26480 bytes
SHA-256: 65f594f8244a55262cfd6be0fec2ddc2dd971920941c2b9acf4de3333a357cec
font_01_sfnt_off00008dbf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8DBF 2824 bytes
SHA-256: 94c1b019735d7e491765340abe50b2897410e2ec65ecf141c08bd9f2220897c4
font_02_sfnt_off00009769.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9769 5696 bytes
SHA-256: 450e3ee45915afe13702bf1d587eb8b9ad88a8d2113419ac9f2fd116a828e139
font_03_sfnt_off0000a47b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xA47B 18980 bytes
SHA-256: ea8d199124f15c6b00832643c5d16d16f78d71282abe7e531757bb6c58edef1b

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