Malicious PDF — malware analysis report

Static analysis result for SHA-256 767ddd89492463c3…

MALICIOUS

PDF

34.2 KB Created: 2021-07-07 23:48:08 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-16
MD5: 751a7a53d14d31cff4f1be0e37138e4e SHA-1: 26602fa05c905ae0059322f84fa0b96d919d0241 SHA-256: 767ddd89492463c308a13a7697ae911c43955b837a0a2231ed0d6effddb8ee80
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 entice users to click on links. The primary link directs to a known malicious redirector infrastructure, which in turn hosts further malicious PDF files. The ML classifier strongly indicates maliciousness, and the document's content and embedded URLs align with a phishing or social engineering attack.

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.tw/app/431946152/how-to-hack-a-roblox-account-2021-october-game-hack In PDF document text
    • https://fridaytravelnepal.com/userfiles/files/claim-free-robux_GM431946152.pdfIn PDF document text
    • https://fridaytravelnepal.com/userfiles/files/free-robux-mobile_GM431946152.pdfIn PDF document text
    • https://fridaytravelnepal.com/userfiles/files/hacks-para-roblox-arsenal_GM431946152.pdfIn PDF document text
    • https://fridaytravelnepal.com/userfiles/files/how-to-get-free-robux-on-chromebook_GM431946152.pdfIn PDF document text
    • https://fridaytravelnepal.com/userfiles/files/hack-coin-master-spin-android_GM406889139.pdfIn PDF document text
    • https://fridaytravelnepal.com/userfiles/files/scaffold-minecraft-hack_GM479516143.pdfIn PDF document text
    • https://fridaytravelnepal.com/userfiles/files/free-cool-robux_GM431946152.pdfIn PDF document text
    • https://fridaytravelnepal.com/userfiles/files/coin-master-mod-version-free-download-ios_GM406889139.pdfIn PDF document text
    • https://fridaytravelnepal.com/userfiles/files/mcmaster-club-coin-master-hack_GM406889139.pdfIn PDF document text
    • https://fridaytravelnepal.com/userfiles/files/coin-master-hack-without-verification-2021_GM406889139.pdfIn PDF document text
    • https://fridaytravelnepal.com/userfiles/files/coin-master-key-free-spin_GM406889139.pdfIn PDF document text
    • https://fridaytravelnepal.com/userfiles/files/how-to-hack-a-roblox-account-2021_GM431946152.pdfIn PDF document text
    • https://fridaytravelnepal.com/userfiles/files/como-hackear-coin-master-2021_GM406889139.pdfIn PDF document text
    • https://fridaytravelnepal.com/userfiles/files/get-free-robux-no-verification_GM431946152.pdfIn PDF document text
    • https://fridaytravelnepal.com/userfiles/files/cite-roblox-hacker_GM431946152.pdfIn PDF document text
    • https://fridaytravelnepal.com/userfiles/files/roblox-mafia-cloth-for-free_GM431946152.pdfIn PDF document text
    • https://fridaytravelnepal.com/userfiles/files/free-coins-and-spins-coin-master-2021_GM406889139.pdfIn PDF document text
    • https://fridaytravelnepal.com/userfiles/files/buy-robux-free_GM431946152.pdfIn PDF document text
    • https://fridaytravelnepal.com/userfiles/files/hacking-app-for-hacking-roblox-jailbreak_GM431946152.pdfIn PDF document text
    • https://fridaytravelnepal.com/userfiles/files/coin-master-hack-apk-with-fb-login_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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00002f69.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2F69 21856 bytes
SHA-256: b0507508fc14612d4c94bea3fc64a809af7a114d189c171a9ad1224717b5e7eb
font_01_sfnt_off00005f82.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5F82 19280 bytes
SHA-256: bbb7b05ad956ca56447d9ed13c6d0ae67cef79b7129622d7a8b13658015c1c97

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