Malicious PDF — malware analysis report

Static analysis result for SHA-256 2fbb25d14fccc6d7…

MALICIOUS

PDF

35.8 KB Created: 2021-06-18 16:58:25 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-16
MD5: 553d32b89837ca539524a762f7202101 SHA-1: 5b5d5bc54c022ea125d6ebe052d20e77b09f6402 SHA-256: 2fbb25d14fccc6d7d8324592f02e4bfbf491684a4b72d520bcbb3ef3b220ddf5
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple links, including one to a known malicious redirector infrastructure at http://netcdn.co/app/431946152/how-to-get-clothes-in-roblox-for-free-game-hack. This redirector is presented as a 'free generator / game hack' lure, aiming to trick users into clicking through to potentially malicious content. The ML classifier also strongly indicated maliciousness.

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/how-to-get-clothes-in-roblox-for-free-game-hack In PDF document text
    • https://hekl-software.de/images/roblox-rewards-robux_GM431946152.pdfIn PDF document text
    • https://hekl-software.de/images/coin-master-free-link-today_GM406889139.pdfIn PDF document text
    • https://hekl-software.de/images/how-to-get-minecraft-for-free-on-xbox-one_GM479516143.pdfIn PDF document text
    • https://hekl-software.de/images/coin-master-pc-game-free-download_GM406889139.pdfIn PDF document text
    • https://hekl-software.de/images/coin-master-real-hack_GM406889139.pdfIn PDF document text
    • https://hekl-software.de/images/free-roblox-gift-card-codes-2021-unused_GM431946152.pdfIn PDF document text
    • https://hekl-software.de/images/inappropriate-roblox-games-2021_GM431946152.pdfIn PDF document text
    • https://hekl-software.de/images/get-free-spins-in-coin-master_GM406889139.pdfIn PDF document text
    • https://hekl-software.de/images/how-to-get-hacks-on-roblox_GM431946152.pdfIn PDF document text
    • https://hekl-software.de/images/coin-master-hack-apk-download-for-android_GM406889139.pdfIn PDF document text
    • https://hekl-software.de/images/weird-roblox_GM431946152.pdfIn PDF document text
    • https://hekl-software.de/images/games-that-give-free-robux_GM431946152.pdfIn PDF document text
    • https://hekl-software.de/images/mobihack-net-roblox-hack_GM431946152.pdfIn PDF document text
    • https://hekl-software.de/images/free-spin-link-for-coin-master-game_GM406889139.pdfIn PDF document text
    • https://hekl-software.de/images/coin-master-spin-ml_GM406889139.pdfIn PDF document text
    • https://hekl-software.de/images/vip-roblox-free_GM431946152.pdfIn PDF document text
    • https://hekl-software.de/images/free-roblox-accounts-v3rm_GM431946152.pdfIn PDF document text
    • https://hekl-software.de/images/free-robux-come_GM431946152.pdfIn PDF document text
    • https://hekl-software.de/images/roblox-free-pants_GM431946152.pdfIn PDF document text
    • https://hekl-software.de/images/does-pubg-uc-generator-work_GM1330123889.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_off000033bd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x33BD 23148 bytes
SHA-256: a9c386d2886f7700b70f7b6fc9af7c779032fbdba9daeddbb729cd42a05c69ad
font_01_sfnt_off00006778.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6778 18900 bytes
SHA-256: 0dc9b74fb205dd89c96426fb0861c564af33224f526fc3edfc706d9d689590c9

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