Malicious PDF — malware analysis report

Static analysis result for SHA-256 7c2844e55ed65805…

MALICIOUS

PDF

44.7 KB Created: 2021-05-13 07:38:55 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: 5ca13fb8ce5d96c17b5e03099e7782f9 SHA-1: 6bbd22b8004d0049e7f1bc59f54a779513ef0b4d SHA-256: 7c2844e55ed65805ffbac372e33bc02079e949691ca1659edb3c6c3034479e82
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded links that redirect to known malicious infrastructure, specifically promoting "free game hacks" for titles like Minecraft and Coin Master. The ML classifier also flagged this PDF as malicious. The primary malicious activity observed is the redirection to a malicious URL, likely intended to deliver a secondary payload or phish for credentials.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9632

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/479516143/minecraft-education-free-game-hack In PDF document text
    • https://www.ocic.hr/files/coin-master-free-link_GM406889139.pdfIn PDF document text
    • https://www.ocic.hr/files/how-to-hack-coin-master-ios_GM406889139.pdfIn PDF document text
    • http://www.ocic.hr/files/coin-master-free-coins-and-spins-daily-summary_GM406889139.pdfIn PDF document text
    • https://www.ocic.hr/files/coin-master-links-for-free-spins-2021_GM406889139.pdfIn PDF document text
    • http://www.ocic.hr/files/daily-coin-master-link_GM406889139.pdfIn PDF document text
    • http://www.ocic.hr/files/minecraft-java-hacks_GM479516143.pdfIn PDF document text
    • https://www.ocic.hr/files/coin-master-free-spins-link-blogspot_GM406889139.pdfIn PDF document text
    • https://www.ocic.hr/files/orewards-com-free-robux_GM431946152.pdfIn PDF document text
    • http://www.ocic.hr/files/get-free-spins-on-coin-master_GM406889139.pdfIn PDF document text
    • https://www.ocic.hr/files/how-many-free-spin-links-is-there-for-coin-master_GM406889139.pdfIn PDF document text
    • http://www.ocic.hr/files/hack-coin-master-game-download_GM406889139.pdfIn PDF document text
    • https://www.ocic.hr/files/blox-pink-robux-free_GM431946152.pdfIn PDF document text
    • https://www.ocic.hr/files/roblox-promo-code-to-get-free-robux_GM431946152.pdfIn PDF document text
    • http://www.ocic.hr/files/roblox-hack-unlimited-robux_GM431946152.pdfIn PDF document text
    • https://www.ocic.hr/files/roblox-games-that-give-you-free-robux_GM431946152.pdfIn PDF document text
    • https://www.ocic.hr/files/free-robux-stream_GM431946152.pdfIn PDF document text
    • https://www.ocic.hr/files/worst-roblox-avatars_GM431946152.pdfIn PDF document text
    • https://www.ocic.hr/files/public-enemy-sun-prairie-coin-master-free-spins_GM406889139.pdfIn PDF document text
    • https://www.ocic.hr/files/coin-master-free-spins-cheats_GM406889139.pdfIn PDF document text
    • http://www.ocic.hr/files/minecraft-diamond-finder-hack_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_off00004a12.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4A12 25384 bytes
SHA-256: b782337ab78703a64ccc7c2f1949679a3a6095115336f0d998bd41d9c191d4f9
font_01_sfnt_off00008349.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8349 2840 bytes
SHA-256: 3fb127b764b9d10f5525bc4de5ec8316de704409ccb0cf21cff3ad8a30d11676
font_02_sfnt_off00008cfb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8CFB 18024 bytes
SHA-256: 50b2d5ff22f0b3ffa840834f12cbec9953eabd3c4e347b5eb6eb3aff22325aed

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