Malicious PDF — malware analysis report

Static analysis result for SHA-256 03a4abf898c99052…

MALICIOUS

PDF

33.8 KB Created: 2021-07-05 08:33:23 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-15
MD5: f94d883e20a1fb6ead5f14c6defc4695 SHA-1: e97b7cf8025e8ddbdde12ece66c68ce22cc9f199 SHA-256: 03a4abf898c990527834aa746f561c4fa918173f50e8632468042a4e83e1ec04
160 Risk Score

Malware Insights

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

The PDF document contains multiple links to a known malicious redirector, specifically http://netcdn.tw/app/431946152/free-roblox-toys-game-hack. The document body and embedded links suggest a lure for game-related cheats or items, aiming to trick users into visiting the malicious site. 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.tw/app/431946152/free-roblox-toys-game-hack In PDF document text
    • https://xiangquan.com.tw/image/data/files/roblox-hack-unlimited-robux_GM431946152.pdfIn PDF document text
    • https://xiangquan.com.tw/image/data/files/optifine-pe_GM479516143.pdfIn PDF document text
    • https://xiangquan.com.tw/image/data/files/free-coins-coin-master-2021_GM406889139.pdfIn PDF document text
    • https://xiangquan.com.tw/image/data/files/adopt-me-roblox-hacks_GM431946152.pdfIn PDF document text
    • https://xiangquan.com.tw/image/data/files/coin-master-for-pc-free-download_GM406889139.pdfIn PDF document text
    • https://xiangquan.com.tw/image/data/files/20-free-spins-coin-master_GM406889139.pdfIn PDF document text
    • https://xiangquan.com.tw/image/data/files/free-spins-coin-master-ios-2021_GM406889139.pdfIn PDF document text
    • https://xiangquan.com.tw/image/data/files/how-to-hack-roblox-accounts_GM431946152.pdfIn PDF document text
    • https://xiangquan.com.tw/image/data/files/free-robux-for-free_GM431946152.pdfIn PDF document text
    • https://xiangquan.com.tw/image/data/files/coin-master-free-link-2021_GM406889139.pdfIn PDF document text
    • https://xiangquan.com.tw/image/data/files/coin-master-free-coins-and-spins-daily_GM406889139.pdfIn PDF document text
    • https://xiangquan.com.tw/image/data/files/robux-hack-download-no-humanverifycation_GM431946152.pdfIn PDF document text
    • https://xiangquan.com.tw/image/data/files/best-free-hair-roblox_GM431946152.pdfIn PDF document text
    • https://xiangquan.com.tw/image/data/files/roblox-avatar-girl_GM431946152.pdfIn PDF document text
    • https://xiangquan.com.tw/image/data/files/coin-master-hack-download-ios_GM406889139.pdfIn PDF document text
    • https://xiangquan.com.tw/image/data/files/free-robux-obby-2021_GM431946152.pdfIn PDF document text
    • https://xiangquan.com.tw/image/data/files/roblox-premium-for-free_GM431946152.pdfIn PDF document text
    • https://xiangquan.com.tw/image/data/files/haktuts-coin-master-free-spin-link_GM406889139.pdfIn PDF document text
    • https://xiangquan.com.tw/image/data/files/minecraft-ore-finder-mod_GM479516143.pdfIn PDF document text
    • https://xiangquan.com.tw/image/data/files/free-roblox-faction-defense-level-code_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_off00002df7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2DF7 22240 bytes
SHA-256: 5af2ac2ed47465f5525fea14a967fc2f8a470802b90485d70c3537231379e9d4
font_01_sfnt_off00005f5d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5F5D 18828 bytes
SHA-256: 0ae16075fab88340abf3ae58f1c231bf26e12fe3956ddb751496fa7b825c2438

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