Malicious PDF — malware analysis report

Static analysis result for SHA-256 a624daf164893f69…

MALICIOUS

PDF

44.8 KB Created: 2021-06-11 02:53:06 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: f02e1b48ac97b39f7f9dc2fb2c4ac11e SHA-1: d2333cc133ca4f7ff0c2276ac1506dcf2be6e506 SHA-256: a624daf164893f692d13610e7cb06d73fa7a649a5cacbff315b2072039b498b8
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple links pointing to a known malicious redirector, disguised as a generator for in-game currency. The document body and heuristics indicate a lure for free game items, which is a common social engineering tactic. No scripts were extracted, but the embedded URLs are the primary indicators of malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9865

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.tw/app/431946152/earn-free-robux-today-game-hack In PDF document text
    • https://www.elevage-chiot.fr/images/earn-free-robux-on-roblox_GM431946152.pdfIn PDF document text
    • https://www.elevage-chiot.fr/images/roblox-redeem-card-codes-free_GM431946152.pdfIn PDF document text
    • https://www.elevage-chiot.fr/images/daily-free-spin-coin-master-link_GM406889139.pdfIn PDF document text
    • https://www.elevage-chiot.fr/images/how-to-make-an-audio-on-roblox-free_GM431946152.pdfIn PDF document text
    • https://www.elevage-chiot.fr/images/robux-codes-generator-no-human-verification_GM431946152.pdfIn PDF document text
    • https://www.elevage-chiot.fr/images/bloxland-earn-free-robux_GM431946152.pdfIn PDF document text
    • https://www.elevage-chiot.fr/images/ro-ghoul-script_GM431946152.pdfIn PDF document text
    • https://www.elevage-chiot.fr/images/blox-world-free-robux_GM431946152.pdfIn PDF document text
    • https://www.elevage-chiot.fr/images/coin-master-hack-iphone_GM406889139.pdfIn PDF document text
    • https://www.elevage-chiot.fr/images/free-spins-on-coin-master-iphone_GM406889139.pdfIn PDF document text
    • https://www.elevage-chiot.fr/images/promo-code-free-robux_GM431946152.pdfIn PDF document text
    • https://www.elevage-chiot.fr/images/tiktok-for-free_GM835599320.pdfIn PDF document text
    • https://www.elevage-chiot.fr/images/wwwrobux-hacks_GM431946152.pdfIn PDF document text
    • https://www.elevage-chiot.fr/images/what-is-robux-in-roblox_GM431946152.pdfIn PDF document text
    • https://www.elevage-chiot.fr/images/how-to-get-free-likes-on-tiktok_GM835599320.pdfIn PDF document text
    • https://www.elevage-chiot.fr/images/coin-master-hack-link_GM406889139.pdfIn PDF document text
    • https://www.elevage-chiot.fr/images/coinmaster-spin-ml-link_GM406889139.pdfIn PDF document text
    • https://www.elevage-chiot.fr/images/free-spins-and-coins-on-coin-master_GM406889139.pdfIn PDF document text
    • https://www.elevage-chiot.fr/images/coin-master-hack-2021-without-verification_GM406889139.pdfIn PDF document text
    • https://www.elevage-chiot.fr/images/free-coin-link-coin-master_GM406889139.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_004_off00005173.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x5173 26036 bytes
SHA-256: 18aa6a4af31a5ba8cac58d61e0ee82713657df19ebeb6104911eb037f1e13ddc
font_01_sfnt_off00008b70.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8B70 18596 bytes
SHA-256: 856adb635f1df42b1ab7aec7f905735c2cb2dfebd4088312a1c80dc48447787c