Malicious PDF — malware analysis report

Static analysis result for SHA-256 5fae6344211c4199…

MALICIOUS

PDF

35.0 KB Created: 2021-06-29 11:07:47 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-15
MD5: b1d52bc7dbf1bd698f6f95435b4e5f5d SHA-1: 4d132110ac2285a1a089980865ba86029e44f9d8 SHA-256: 5fae6344211c4199260f9b2eec5d7e7cc94fc1330ab8e2021c52305818b322af
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple heuristics indicating malicious redirector links, specifically targeting users with lures related to game hacks and generators. The embedded URL http://netcdn.co/app/431946152/roblox-cheat-engine-tables-game-hack is identified as a malicious redirector. The document body, though partially corrupted, contains text and URLs consistent with a phishing or scam attempt.

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/roblox-cheat-engine-tables-game-hack In PDF document text
    • https://xiangquan.com.tw/image/data/files/earn-robux-websites_GM431946152.pdfIn PDF document text
    • https://xiangquan.com.tw/image/data/files/free-roblox-clothes-and-hair-not-model_GM431946152.pdfIn PDF document text
    • https://xiangquan.com.tw/image/data/files/roblox-controversy_GM431946152.pdfIn PDF document text
    • https://xiangquan.com.tw/image/data/files/free-robux-without-human-verification-2021_GM431946152.pdfIn PDF document text
    • https://xiangquan.com.tw/image/data/files/roblox-pizza-hack_GM431946152.pdfIn PDF document text
    • https://xiangquan.com.tw/image/data/files/robux-no-survey_GM431946152.pdfIn PDF document text
    • https://xiangquan.com.tw/image/data/files/roblox-arsenal-hack_GM431946152.pdfIn PDF document text
    • https://xiangquan.com.tw/image/data/files/how-to-get-minecraft-coins-for-free_GM479516143.pdfIn PDF document text
    • https://xiangquan.com.tw/image/data/files/2021-free-spins-coin-master_GM406889139.pdfIn PDF document text
    • https://xiangquan.com.tw/image/data/files/how-to-get-robux-easy_GM431946152.pdfIn PDF document text
    • https://xiangquan.com.tw/image/data/files/roblox-hack-scripts-pastebin_GM431946152.pdfIn PDF document text
    • https://xiangquan.com.tw/image/data/files/windows-10-minecraft-hacks_GM479516143.pdfIn PDF document text
    • https://xiangquan.com.tw/image/data/files/how-to-hack-kat-roblox_GM431946152.pdfIn PDF document text
    • https://xiangquan.com.tw/image/data/files/coin-master-hack-apk-free-download_GM406889139.pdfIn PDF document text
    • https://xiangquan.com.tw/image/data/files/earn-free-spins-coin-master_GM406889139.pdfIn PDF document text
    • https://xiangquan.com.tw/image/data/files/how-to-change-your-username-in-roblox-for-free_GM431946152.pdfIn PDF document text
    • https://xiangquan.com.tw/image/data/files/80-free-spins-coin-master_GM406889139.pdfIn PDF document text
    • https://xiangquan.com.tw/image/data/files/free-op-minecraft-servers_GM479516143.pdfIn PDF document text
    • https://xiangquan.com.tw/image/data/files/roblox-cheats-carry-music_GM431946152.pdfIn PDF document text
    • https://xiangquan.com.tw/image/data/files/descargar-coin-master-hackeado_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_002_off00003094.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x3094 23076 bytes
SHA-256: d69ac7c8f4869b63d911320fa77807c322849b828a115dad4bdf7ab1a298739c
font_01_sfnt_off0000644f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x644F 18876 bytes
SHA-256: 19d596b5ff6e1525d93d851abdf3b87bcc19abf30cbb382151ed2b9536630b33

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