Malicious PDF — malware analysis report

Static analysis result for SHA-256 a162c94fce66be15…

MALICIOUS

PDF

43.9 KB Created: 2021-06-11 04:08:19 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-16
MD5: ec5937cceda42e18052576fa21cac4f3 SHA-1: cf9bb7ea0b6d972fd2166f051e6f70ba0b9b1505 SHA-256: a162c94fce66be1518278ece9f8369f00377b826d61451e2fa3a848a241f7035
220 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 in-game currency to trick users into clicking malicious links. The document contains multiple links to known malicious redirectors and SEO link farms, designed to funnel users to potentially harmful content. The ML classifier strongly indicates malicious intent, and the presence of embedded URLs suggests an attempt to exploit users through deceptive content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9865

Heuristics 5

  • 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.
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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/alone-battle-royale-hacks-roblox-game-hack In PDF document text
    • https://fridaytravelnepal.com/userfiles/files/roblox-how-to-get-free-clothes_GM431946152.pdfIn PDF document text
    • https://fridaytravelnepal.com/userfiles/files/free-coins-2021-coin-master-link_GM406889139.pdfIn PDF document text
    • https://fridaytravelnepal.com/userfiles/files/how-do-you-get-free-roblox_GM431946152.pdfIn PDF document text
    • https://fridaytravelnepal.com/userfiles/files/hack-coin-master-for-iphone_GM406889139.pdfIn PDF document text
    • https://fridaytravelnepal.com/userfiles/files/roblox-fun-robux_GM431946152.pdfIn PDF document text
    • https://fridaytravelnepal.com/userfiles/files/coin-master-free-spins-apk-2021_GM406889139.pdfIn PDF document text
    • https://fridaytravelnepal.com/userfiles/files/roblox-rewards-robux_GM431946152.pdfIn PDF document text
    • https://fridaytravelnepal.com/userfiles/files/how-to-get-free-robux-easy-on-phone_GM431946152.pdfIn PDF document text
    • https://fridaytravelnepal.com/userfiles/files/minecraft-skins-free-girl_GM479516143.pdfIn PDF document text
    • https://fridaytravelnepal.com/userfiles/files/minecraft-112-hacked-client_GM479516143.pdfIn PDF document text
    • https://fridaytravelnepal.com/userfiles/files/coinmaster-spin-ml-link_GM406889139.pdfIn PDF document text
    • https://fridaytravelnepal.com/userfiles/files/hack-coin-master-spin-android_GM406889139.pdfIn PDF document text
    • https://fridaytravelnepal.com/userfiles/files/download-coin-master-apk-hacked_GM406889139.pdfIn PDF document text
    • https://fridaytravelnepal.com/userfiles/files/coin-master-daily-free-spins-and-coins_GM406889139.pdfIn PDF document text
    • https://fridaytravelnepal.com/userfiles/files/coin-master-free-spins-2021-generator_GM406889139.pdfIn PDF document text
    • https://fridaytravelnepal.com/userfiles/files/coin-master-free-spins-iphone-2021_GM406889139.pdfIn PDF document text
    • https://fridaytravelnepal.com/userfiles/files/free-private-server-roblox-jailbreak_GM431946152.pdfIn PDF document text
    • https://fridaytravelnepal.com/userfiles/files/minecraft-name-tag-hacks_GM479516143.pdfIn PDF document text
    • https://fridaytravelnepal.com/userfiles/files/avatar-roblox-game_GM431946152.pdfIn PDF document text
    • https://fridaytravelnepal.com/userfiles/files/mcmaster-club-coin-master-hack_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
stream_004_off00005052.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x5052 24516 bytes
SHA-256: beb2de70594c0d5714f9d4411528f0bdf780992edb59df0f1936b8a23ee8a3bd
font_01_sfnt_off00008825.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8825 18468 bytes
SHA-256: d3e5c42aadf0b890a6d9d6bcad015a7172bd90e376f14da55aeec39619991ec7

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