Malicious PDF — malware analysis report

Static analysis result for SHA-256 32b9717eebf1fb0e…

MALICIOUS

PDF

33.9 KB Created: 2021-06-26 03:46:17 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-15
MD5: a79d82a6fc780a717ed0a49803559e3b SHA-1: 4799734ed64913af83030879ce51a38680f1177f SHA-256: 32b9717eebf1fb0e149b03b7f22e0a18c16b2a32e786a451ff71b4fdb00e608c
160 Risk Score

Malware Insights

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

This PDF document employs a lure of game hacks and free currency to trick users into clicking malicious links. The primary link directs to a known malicious redirector, which in turn hosts further malicious PDF files. The ML classifier strongly indicated maliciousness, and the document body contains multiple URLs pointing to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

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 http://netcdn.co/app/431946152/roblox-jailbreak-hack-paint-game-hack In PDF document text
    • http://www.repion.com/uploaded_files/userfiles/files/how-to-hack-someone-on-roblox_GM431946152.pdfIn PDF document text
    • http://www.repion.com/uploaded_files/userfiles/files/coin-master-free-spins-and-coins_GM406889139.pdfIn PDF document text
    • http://www.repion.com/uploaded_files/userfiles/files/how-to-get-robux-free-sin-pastebin-2021_GM431946152.pdfIn PDF document text
    • http://www.repion.com/uploaded_files/userfiles/files/blox-rewards_GM431946152.pdfIn PDF document text
    • http://www.repion.com/uploaded_files/userfiles/files/err-face-roblox-free_GM431946152.pdfIn PDF document text
    • http://www.repion.com/uploaded_files/userfiles/files/roblox-cheat-rs-2021_GM431946152.pdfIn PDF document text
    • http://www.repion.com/uploaded_files/userfiles/files/coin-master-free-spins-link-today-instagram_GM406889139.pdfIn PDF document text
    • http://www.repion.com/uploaded_files/userfiles/files/minecraft-com-free_GM479516143.pdfIn PDF document text
    • http://www.repion.com/uploaded_files/userfiles/files/coin-master-free-spins-1-coin-master_GM406889139.pdfIn PDF document text
    • http://www.repion.com/uploaded_files/userfiles/files/coin-master-daily-gift-free-spins-and-coins-link_GM406889139.pdfIn PDF document text
    • http://www.repion.com/uploaded_files/userfiles/files/free-play-roblox-hotel_GM431946152.pdfIn PDF document text
    • http://www.repion.com/uploaded_files/userfiles/files/how-can-you-get-free-robux_GM431946152.pdfIn PDF document text
    • http://www.repion.com/uploaded_files/userfiles/files/coin-master-app_GM406889139.pdfIn PDF document text
    • http://www.repion.com/uploaded_files/userfiles/files/coin-master-free-coins-and-spins-blogspot_GM406889139.pdfIn PDF document text
    • http://www.repion.com/uploaded_files/userfiles/files/coin-master-club-hack_GM406889139.pdfIn PDF document text
    • http://www.repion.com/uploaded_files/userfiles/files/www-coin-master-hack-tk_GM406889139.pdfIn PDF document text
    • http://www.repion.com/uploaded_files/userfiles/files/how-to-hack-coin-master-apple_GM406889139.pdfIn PDF document text
    • http://www.repion.com/uploaded_files/userfiles/files/roblox-hair-for-free_GM431946152.pdfIn PDF document text
    • http://www.repion.com/uploaded_files/userfiles/files/free-minecraft-skins-xbox-one_GM479516143.pdfIn PDF document text
    • http://www.repion.com/uploaded_files/userfiles/files/to-get-free-robux_GM431946152.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000308d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x308D 21304 bytes
SHA-256: 70598352cbe4b583bf1d77099ee781747ea0cdf163574a0eba5c1fbd1b11f8ce
font_01_sfnt_off00005ed8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5ED8 19200 bytes
SHA-256: 960634952e7468e08cd0d2df856944da6be36e35900c46ad974da7249d8a2716

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