Malicious PDF — malware analysis report

Static analysis result for SHA-256 70fabd53c0d64682…

MALICIOUS

PDF

47.9 KB Created: 2021-06-08 23:59:58 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: abbbc5b20e3d274986a89032c9aa3e49 SHA-1: 96beecdc6e6edd61e0e0161963289a8405f13bb3 SHA-256: 70fabd53c0d64682cf875257bd3fcbd78bc4a21c3ee19b1a0c38d738d945cce7
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document employs a lure of game hacks and free currency to trick users into clicking malicious links. The primary link directs to a known malicious redirector infrastructure, which likely serves as a gateway to further malicious content or downloads. No scripts were extracted, but the embedded links and heuristic firings strongly indicate a phishing or scam campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9871

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.tw/app/431946152/how-to-use-skidama-level-7-roblox-hacks-game-hack In PDF document text
    • http://ycstamping.com.tw/image/data/files/where-can-i-get-free-spins-for-coin-master_GM406889139.pdfIn PDF document text
    • http://ycstamping.com.tw/image/data/files/coin-master-hack-programers_GM406889139.pdfIn PDF document text
    • http://ycstamping.com.tw/image/data/files/get-free-robux-generator_GM431946152.pdfIn PDF document text
    • http://ycstamping.com.tw/image/data/files/how-do-you-get-robux-on-roblox_GM431946152.pdfIn PDF document text
    • http://ycstamping.com.tw/image/data/files/minecraft-server-hacks_GM479516143.pdfIn PDF document text
    • http://ycstamping.com.tw/image/data/files/free-online-generator-for-coin-master_GM406889139.pdfIn PDF document text
    • http://ycstamping.com.tw/image/data/files/coin-master-hack-app-download-free_GM406889139.pdfIn PDF document text
    • http://ycstamping.com.tw/image/data/files/free-robux-no-generator_GM431946152.pdfIn PDF document text
    • http://ycstamping.com.tw/image/data/files/websites-to-get-free-robux_GM431946152.pdfIn PDF document text
    • http://ycstamping.com.tw/image/data/files/toolbox-for-minecraft-ios_GM479516143.pdfIn PDF document text
    • http://ycstamping.com.tw/image/data/files/wwwcoin-master-free-spincom_GM406889139.pdfIn PDF document text
    • http://ycstamping.com.tw/image/data/files/how-to-free-robux_GM431946152.pdfIn PDF document text
    • http://ycstamping.com.tw/image/data/files/coin-master-free-spins-link-today-facebook_GM406889139.pdfIn PDF document text
    • http://ycstamping.com.tw/image/data/files/coin-master-download_GM406889139.pdfIn PDF document text
    • http://ycstamping.com.tw/image/data/files/robux-hacks-2021_GM431946152.pdfIn PDF document text
    • http://ycstamping.com.tw/image/data/files/free-robux-2021_GM431946152.pdfIn PDF document text
    • http://ycstamping.com.tw/image/data/files/coin-and-spin_GM406889139.pdfIn PDF document text
    • http://ycstamping.com.tw/image/data/files/2021-free-spins-coin-master-link_GM406889139.pdfIn PDF document text
    • http://ycstamping.com.tw/image/data/files/coin-master-free-spins-and-coins-daily_GM406889139.pdfIn PDF document text
    • http://ycstamping.com.tw/image/data/files/minecraft-xbox-360-free-download-code_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_004_off00005409.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x5409 28772 bytes
SHA-256: 0452e3ed4d64be00039ca605c63898ad42cdb0a9658a02ab45b983516f49a1f1
font_01_sfnt_off000095f0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x95F0 19256 bytes
SHA-256: 33e67532c106da9303e3f4ea912f4541012642442f02f35e9d43a8fa38f65f68

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