Malicious PDF — malware analysis report

Static analysis result for SHA-256 e8374209a76b23bc…

MALICIOUS

PDF

47.4 KB Created: 2021-06-03 07:40:07 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-23
MD5: 42925c2e6a0a05538cecb0c9d60b8479 SHA-1: 6ec778db9d4b1e26b8fd1c004deedf046b9644fa SHA-256: e8374209a76b23bc75d8fceaa73ce255e77a0f1dc194e0e2d4a6ca2e1568962a
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple links to redirectors and potentially malicious infrastructure, masquerading as game hacks or generators. The heuristic firings strongly indicate a malicious redirector and a lure for game-related exploits. While no scripts were explicitly extracted, the PDF structure and embedded links suggest an attempt to lead the user to a malicious site, likely for further exploitation or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9769

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.online/app/431946152/how-to-get-roblox-premium-for-free-game-hack In PDF document text
    • https://www.tena-g.hr/files/daily-spins-coin-master_GM406889139.pdfIn PDF document text
    • https://www.tena-g.hr/files/wahoo-gaming-co-free-robux_GM431946152.pdfIn PDF document text
    • https://www.tena-g.hr/files/get-free-robux_GM431946152.pdfIn PDF document text
    • https://www.tena-g.hr/files/free-robux-without-verification-2021_GM431946152.pdfIn PDF document text
    • https://tena-g.hr/files/free-minecraft-account-generator_GM479516143.pdfIn PDF document text
    • https://tena-g.hr/files/real-free-robux-generator_GM431946152.pdfIn PDF document text
    • https://www.tena-g.hr/files/coin-master-daily-free-spins-link-today_GM406889139.pdfIn PDF document text
    • https://www.tena-g.hr/files/minecraft-hacked-apk_GM479516143.pdfIn PDF document text
    • https://tena-g.hr/files/hacked-roblox-game_GM431946152.pdfIn PDF document text
    • https://tena-g.hr/files/links-for-coin-master-free-spins_GM406889139.pdfIn PDF document text
    • https://tena-g.hr/files/free-hacks-for-coin-master_GM406889139.pdfIn PDF document text
    • https://tena-g.hr/files/easy-ways-to-get-free-robux_GM431946152.pdfIn PDF document text
    • https://tena-g.hr/files/coin-master-heaven-links-free-spins_GM406889139.pdfIn PDF document text
    • https://tena-g.hr/files/how-to-get-free-spins-on-coin-master-2021_GM406889139.pdfIn PDF document text
    • https://tena-g.hr/files/are-minecraft-realms-free_GM479516143.pdfIn PDF document text
    • https://www.tena-g.hr/files/minecraft-hacks-wurst_GM479516143.pdfIn PDF document text
    • https://www.tena-g.hr/files/free-money-and-spins-coin-master_GM406889139.pdfIn PDF document text
    • https://www.tena-g.hr/files/mosttechs-coin-master-free-spins_GM406889139.pdfIn PDF document text
    • https://tena-g.hr/files/free-minecraft-realm-codes_GM479516143.pdfIn PDF document text
    • https://tena-g.hr/files/get-free-spins-coin-master-october-2021_GM406889139.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_004_off00004f43.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4F43 25640 bytes
SHA-256: eca2d033e77ab359013d4136eadb08fa07c1f516793a504687069d35868f04c1
font_01_sfnt_off00008b18.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8B18 2844 bytes
SHA-256: baad2f3f6808f4af03fa9398e38c580c8d846f7f773a947d8cc1f39b2753d31a
font_02_sfnt_off000094da.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x94DA 18888 bytes
SHA-256: 80296d3e833823be7f1e21571c517a003a5ed5633da55eadbe5c2ecc0576c034

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