Malicious PDF — malware analysis report

Static analysis result for SHA-256 19d172b1adb7e65d…

MALICIOUS

PDF

34.0 KB Created: 2021-07-05 09:32:10 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-11
MD5: 6f29cfb9589dbc4dc1c0b8f44b85cd50 SHA-1: e30495013a89e7f96ee3cafc95d6a69b50d71440 SHA-256: 19d172b1adb7e65dcd11604ff574c62bc6167b25915842276b0cab8214714a30
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains links to a known malicious redirector, masquerading as a game hack generator. The document body explicitly contains the malicious URL and related game-lure text, indicating an attempt to trick the user into visiting a potentially harmful site. The presence of multiple related PDF links suggests a campaign distributing similar lures.

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/406889139/free-spin-coin-master-hack-2021-game-hack In PDF document text
    • https://3qblocks.com.tw/image/data/files/get-free-coin-master-coins_GM406889139.pdfIn PDF document text
    • https://3qblocks.com.tw/image/data/files/roblox-robux-hack-generator_GM431946152.pdfIn PDF document text
    • https://3qblocks.com.tw/image/data/files/coin-master-free-coins-and-spins-daily_GM406889139.pdfIn PDF document text
    • https://3qblocks.com.tw/image/data/files/free-robux-games-that-actually-work_GM431946152.pdfIn PDF document text
    • https://3qblocks.com.tw/image/data/files/coin-master-free-coins-links-2021_GM406889139.pdfIn PDF document text
    • https://3qblocks.com.tw/image/data/files/card-hack-in-coin-master_GM406889139.pdfIn PDF document text
    • https://3qblocks.com.tw/image/data/files/free-roblox-pin-codes_GM431946152.pdfIn PDF document text
    • https://3qblocks.com.tw/image/data/files/can-you-make-a-shirt-for-free-on-roblox_GM431946152.pdfIn PDF document text
    • https://3qblocks.com.tw/image/data/files/roblox-hack-codes_GM431946152.pdfIn PDF document text
    • https://3qblocks.com.tw/image/data/files/coin-master-free-spin-today_GM406889139.pdfIn PDF document text
    • https://3qblocks.com.tw/image/data/files/coin-master-email-rewards_GM406889139.pdfIn PDF document text
    • https://3qblocks.com.tw/image/data/files/free-roblox-adopt-me-pets_GM431946152.pdfIn PDF document text
    • https://3qblocks.com.tw/image/data/files/free-robux-tutorial_GM431946152.pdfIn PDF document text
    • https://3qblocks.com.tw/image/data/files/free-role-in-coin-master_GM406889139.pdfIn PDF document text
    • https://3qblocks.com.tw/image/data/files/free-robux-generator-no-human-verification-2021_GM431946152.pdfIn PDF document text
    • https://3qblocks.com.tw/image/data/files/300-daily-free-spins-coin-master_GM406889139.pdfIn PDF document text
    • https://3qblocks.com.tw/image/data/files/hack-exploit-for-roblox-no-virus_GM431946152.pdfIn PDF document text
    • https://3qblocks.com.tw/image/data/files/free-robux-com-2021_GM431946152.pdfIn PDF document text
    • https://3qblocks.com.tw/image/data/files/free-robux-just-enter-username-and-password_GM431946152.pdfIn PDF document text
    • https://3qblocks.com.tw/image/data/files/minecraft-pe-texture-packs-free-download_GM479516143.pdfIn 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_002_off00002dca.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x2DCA 22716 bytes
SHA-256: eac34712296ba3a32a6cd41b7fb69d86e442a6d32c1d52efa11381a89ab32e5d
font_01_sfnt_off000060c3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x60C3 18748 bytes
SHA-256: 09e9522e43d1493e395b46c6e396a2d39f5a619d28468af8eceb278664062f1f

Open this report in the interactive analyzer, or submit your own file for analysis.