Malicious PDF — malware analysis report

Static analysis result for SHA-256 52e96e46e1f7de73…

MALICIOUS

PDF

43.8 KB Created: 2021-05-12 17:13:02 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-11-20
MD5: 27674b9e41d23153bb60626f2868f89f SHA-1: 445476298586e82b824352767cb48a2d46a40caf SHA-256: 52e96e46e1f7de73d4a481bc58e7604aa8b8ad7e577913d86953176565be4952
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF contains multiple links to redirectors and known malicious infrastructure, specifically promoting 'game hacks' and 'free generators' to lure users. The document body and heuristics indicate a clear intent to trick users into visiting these malicious URLs, likely to download further malware or engage in scams. No scripts were extracted, but the embedded URLs and heuristic firings strongly suggest a malicious download or redirection campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9648

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/how-to-hack-coin-master-spin-ios-game-hack In PDF document text
    • http://fobh.net/userfiles/files/how-to-change-your-roblox-username-for-free_GM431946152.pdfIn PDF document text
    • http://fobh.net/userfiles/files/minecraft-tools_GM479516143.pdfIn PDF document text
    • http://fobh.net/userfiles/files/coin-master-free-pet-food_GM406889139.pdfIn PDF document text
    • http://fobh.net/userfiles/files/robux-fun-hack_GM431946152.pdfIn PDF document text
    • http://fobh.net/userfiles/files/free-coins-for-coin-master-blogger_GM406889139.pdfIn PDF document text
    • http://fobh.net/userfiles/files/coin-master-free-spins-link-2021-haktuts_GM406889139.pdfIn PDF document text
    • http://fobh.net/userfiles/files/coin-master-gift-link-hack_GM406889139.pdfIn PDF document text
    • http://fobh.net/userfiles/files/free-custom-minecraft-skins_GM479516143.pdfIn PDF document text
    • http://fobh.net/userfiles/files/free-roblox-gift-card-codes-2021-unused_GM431946152.pdfIn PDF document text
    • http://fobh.net/userfiles/files/coin-master-tricks_GM406889139.pdfIn PDF document text
    • http://fobh.net/userfiles/files/minecraft-hack-app_GM479516143.pdfIn PDF document text
    • http://fobh.net/userfiles/files/roblox-hack-apk_GM431946152.pdfIn PDF document text
    • http://fobh.net/userfiles/files/hack-robux_GM431946152.pdfIn PDF document text
    • http://fobh.net/userfiles/files/free-spin-coin-master-link-download_GM406889139.pdfIn PDF document text
    • http://fobh.net/userfiles/files/free-robux-today_GM431946152.pdfIn PDF document text
    • http://fobh.net/userfiles/files/hacks-for-roblox-prison-life_GM431946152.pdfIn PDF document text
    • http://fobh.net/userfiles/files/free-robux-without-offers_GM431946152.pdfIn PDF document text
    • http://fobh.net/userfiles/files/how-to-get-minecraft-for-free-2021_GM479516143.pdfIn PDF document text
    • http://fobh.net/userfiles/files/free-spins-and-coins-for-coin-master_GM406889139.pdfIn PDF document text
    • http://fobh.net/userfiles/files/daily-free-spins_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_003_off000048b3.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x48B3 24580 bytes
SHA-256: 69992907e765393c266f40057544539b8058b1f671e0afca25385c11008c6a27
font_01_sfnt_off00007fa1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7FA1 2840 bytes
SHA-256: 3fb127b764b9d10f5525bc4de5ec8316de704409ccb0cf21cff3ad8a30d11676
font_02_sfnt_off00008953.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8953 18056 bytes
SHA-256: 53f47b5799dae006b4346a2eed5aba235b3af24a2c4343d13ea096ab027fb028

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