Malicious PDF — malware analysis report

Static analysis result for SHA-256 a94543c558479d83…

MALICIOUS

PDF

44.1 KB Created: 2021-05-19 19:35:13 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: 23d8dfb768066fc5fa0f96eda1332fad SHA-1: dddac91a96ff55ab927b6e2cf9c18d2400519dd7 SHA-256: a94543c558479d83437f9a9b6b312e086043a68cf4dad2d74da5361b2928da97
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a critical heuristic firing for a malicious redirector link, specifically targeting users with lures for 'free generators' and 'game hacks'. The document body and embedded links point to infrastructure designed to trick users into downloading further content. While no scripts were directly extracted, the nature of the PDF and its links suggests a common pattern of using social engineering to deliver a secondary payload.

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/835599320/how-to-watch-any-movie-for-free-tiktok-hack-game-hack In PDF document text
    • http://acp-institut.fr/images/coin-master-free-codes_GM406889139.pdfIn PDF document text
    • http://acp-institut.fr/images/pokemon-go-hack-version-free-download_GM1094591345.pdfIn PDF document text
    • http://acp-institut.fr/images/coin-master-heaven-links_GM406889139.pdfIn PDF document text
    • http://acp-institut.fr/images/blox-supply-free-robux_GM431946152.pdfIn PDF document text
    • http://acp-institut.fr/images/how-to-get-free-minecraft-alts_GM479516143.pdfIn PDF document text
    • http://acp-institut.fr/images/roblox-robux-hack-generator_GM431946152.pdfIn PDF document text
    • http://acp-institut.fr/images/free-spins-coin-master-no-survey_GM406889139.pdfIn PDF document text
    • http://acp-institut.fr/images/minecraft-free-install_GM479516143.pdfIn PDF document text
    • http://acp-institut.fr/images/roblox-devil_GM431946152.pdfIn PDF document text
    • http://acp-institut.fr/images/how-to-change-your-username-on-roblox-for-free-2021_GM431946152.pdfIn PDF document text
    • http://acp-institut.fr/images/free-spins-coin-master-app-iphone_GM406889139.pdfIn PDF document text
    • http://acp-institut.fr/images/coin-master-hack-spins-and-coins-unlimited-free-download_GM406889139.pdfIn PDF document text
    • http://acp-institut.fr/images/earn-robux-by-watching-ads_GM431946152.pdfIn PDF document text
    • http://acp-institut.fr/images/roblox-printables-free_GM431946152.pdfIn PDF document text
    • http://acp-institut.fr/images/huskybuscom-free-robux_GM431946152.pdfIn PDF document text
    • http://acp-institut.fr/images/how-to-get-free-robux-promo-codes_GM431946152.pdfIn PDF document text
    • http://acp-institut.fr/images/free-links-for-coin-master-2021_GM406889139.pdfIn PDF document text
    • http://acp-institut.fr/images/rbxcity-free-robux_GM431946152.pdfIn PDF document text
    • http://acp-institut.fr/images/coin-master-free-spin-link-list_GM406889139.pdfIn PDF document text
    • http://acp-institut.fr/images/coin-master-free-spins-link-today-new-2021_GM406889139.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_003_off000046c6.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x46C6 24340 bytes
SHA-256: f99c97e98ee3657ab5777a6cb90ee6214fa8e456572e87cb078d478bb07c05f1
font_01_sfnt_off00007e8f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7E8F 2896 bytes
SHA-256: c1a618813a64314343402b2ec738fc11c4c912460a4c7ae3029924d2f9a229cd
font_02_sfnt_off00008874.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8874 18704 bytes
SHA-256: 890da93841de077c71715f194eac355bbed45116db7c39610006c026130952d9

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