Malicious PDF — malware analysis report

Static analysis result for SHA-256 744fe6b1c8f24237…

MALICIOUS

PDF

43.2 KB Created: 2021-05-18 04:25:14 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-11-23
MD5: c1d19cfa1a2ea2c6dac2475c48395075 SHA-1: 56f0b31b5e4006adb0911034a3c008b9d751c04d SHA-256: 744fe6b1c8f242379dc74b3b8bd70651ee4892f9f026ea753033452a5a0c0710
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

This PDF document contains multiple links to known malicious redirectors and infrastructure, disguised as 'free generators' or 'game hacks'. The primary malicious link identified is https://netcdn.xyz/app/479516143/minecraft-pe-apk-download-game-hack. The document's structure and embedded links strongly suggest it is designed to lure users into downloading potentially harmful files or visiting malicious websites, likely as part of a phishing or malware distribution scheme.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9969

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.xyz/app/479516143/minecraft-pe-apk-download-game-hack In PDF document text
    • http://achauco.vn/public/upload/files/roblox-free-clothes-hack_GM431946152.pdfIn PDF document text
    • http://achauco.vn/public/upload/files/roblox-april-fools-hack_GM431946152.pdfIn PDF document text
    • http://achauco.vn/public/upload/files/500-free-coin-master-spins_GM406889139.pdfIn PDF document text
    • http://achauco.vn/public/upload/files/coin-master-free-spins-today-39_GM406889139.pdfIn PDF document text
    • http://achauco.vn/public/upload/files/bux-free-robux_GM431946152.pdfIn PDF document text
    • http://achauco.vn/public/upload/files/minecraft-build-hacks_GM479516143.pdfIn PDF document text
    • http://achauco.vn/public/upload/files/free-spins-on-coin-master-2021_GM406889139.pdfIn PDF document text
    • http://achauco.vn/public/upload/files/mcpe-com_GM479516143.pdfIn PDF document text
    • http://achauco.vn/public/upload/files/www-claim-gg-to-earn-free-robux_GM431946152.pdfIn PDF document text
    • http://achauco.vn/public/upload/files/free-robux-thumbnail_GM431946152.pdfIn PDF document text
    • http://achauco.vn/public/upload/files/block-best-robux_GM431946152.pdfIn PDF document text
    • http://achauco.vn/public/upload/files/roblox-free-body_GM431946152.pdfIn PDF document text
    • http://achauco.vn/public/upload/files/free-minecraft-java-edition-account_GM479516143.pdfIn PDF document text
    • http://achauco.vn/public/upload/files/how-to-get-free-robux-without-verification-or-surveys_GM431946152.pdfIn PDF document text
    • http://achauco.vn/public/upload/files/hack-my-game-xyz-coin-master_GM406889139.pdfIn PDF document text
    • http://achauco.vn/public/upload/files/moonactive-coin-master-free-spins-link_GM406889139.pdfIn PDF document text
    • http://achauco.vn/public/upload/files/minecraft-hacks-pc_GM479516143.pdfIn PDF document text
    • http://achauco.vn/public/upload/files/wwwhaktutsin-2021-08-coinmasterfreespinandcoinlinkhtml-m-1_GM406889139.pdfIn PDF document text
    • http://achauco.vn/public/upload/files/games-for-robux_GM431946152.pdfIn PDF document text
    • http://achauco.vn/public/upload/files/coin-master-links-2021_GM406889139.pdfIn PDF document text
    • http://www.freenom.comHeyIn 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_003_off00004c24.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4C24 25504 bytes
SHA-256: 51df1b39774a604ead2ec0efa5b7e4f2a6275fa2b3d13bbebbe33b2fc69225ff
font_01_sfnt_off00008556.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8556 18788 bytes
SHA-256: 8791d3cc95b23c4b4e10828445a3a5a1b9cddfea01917aff66a6701f48000f7b

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