Malicious PDF — malware analysis report

Static analysis result for SHA-256 15d68253f1fb7f46…

MALICIOUS

PDF

45.7 KB Created: 2021-05-15 06:16:30 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: b42cbfa16e06187abb7fe4f6b6377002 SHA-1: ad386ac75273560ccf3068c1feb3171aeb08f945 SHA-256: 15d68253f1fb7f4613de08ecfba87a67e35f1bc2991ae36ddbecf5e4fc408622
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple embedded links, including one pointing to a known malicious redirector infrastructure. The document body and heuristics suggest a lure related to game hacks and free coins, which is a common social engineering tactic. The presence of these links indicates an attempt to redirect the user to potentially malicious websites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9507

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-coins-coin-master-hack-game-hack In PDF document text
    • http://vagency.us/images/comapp-trekfree-coin-spindaily-link-master_GM406889139.pdfIn PDF document text
    • http://vagency.us/images/coin-master-hack-tool-access-online-generator_GM406889139.pdfIn PDF document text
    • http://vagency.us/images/hack-para-coin-master-sin-verification_GM406889139.pdfIn PDF document text
    • http://vagency.us/images/offers-to-get-free-spins-in-coin-master_GM406889139.pdfIn PDF document text
    • http://vagency.us/images/free-roblox-com_GM431946152.pdfIn PDF document text
    • http://vagency.us/images/coin-master-hacks-no-human-verification_GM406889139.pdfIn PDF document text
    • http://vagency.us/images/how-to-get-minecraft-for-free-on-xbox-one_GM479516143.pdfIn PDF document text
    • http://vagency.us/images/dailyrobux_GM431946152.pdfIn PDF document text
    • http://vagency.us/images/coin-master-100-spin_GM406889139.pdfIn PDF document text
    • http://vagency.us/images/how-to-make-a-minecraft-server-for-free_GM479516143.pdfIn PDF document text
    • http://vagency.us/images/free-robux-real_GM431946152.pdfIn PDF document text
    • http://vagency.us/images/games-on-roblox-that-give-you-free-robux_GM431946152.pdfIn PDF document text
    • http://vagency.us/images/easy-roblox-today_GM431946152.pdfIn PDF document text
    • http://vagency.us/images/coin-master-facebook-page_GM406889139.pdfIn PDF document text
    • http://vagency.us/images/free-robux-clothes_GM431946152.pdfIn PDF document text
    • http://vagency.us/images/how-to-get-robux-for-free-2021_GM431946152.pdfIn PDF document text
    • http://vagency.us/images/free-spins-coin-master-facebook_GM406889139.pdfIn PDF document text
    • http://vagency.us/images/roblox-hack-site_GM431946152.pdfIn PDF document text
    • http://vagency.us/images/how-to-hack-roblox-passwords_GM431946152.pdfIn PDF document text
    • http://vagency.us/images/free-spins-coin-master-app-ios_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_off00004bb5.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4BB5 25108 bytes
SHA-256: dc57599bacd8490f9cb0ddc1d66d61fd75b1dbf825e4f7ea73e92b6f19d297f8
font_01_sfnt_off0000863f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x863F 3400 bytes
SHA-256: 4b3e0f36ad1e0c7e3ea5c178fd2b4f097d1e01575fc6a4101a8b520db34dfe07
font_02_sfnt_off00009169.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9169 17880 bytes
SHA-256: d4b290fbe96f806a63e53895600235ad07ee700a50234ed47d5e5eeda0b1e0de

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