Malicious PDF — malware analysis report

Static analysis result for SHA-256 b06070fdf8d44368…

MALICIOUS

PDF

48.1 KB Created: 2021-06-10 23:24:25 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: 2084636afbd218fef0ff1e8a8adfad28 SHA-1: 3b0f296506268d1371d925bb9c5c820b87525e2b SHA-256: b06070fdf8d4436816eb56aa0abb2aa89c3bfe33bb0f05ab4ae7494806cfec1c
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple links that redirect to malicious infrastructure, masquerading as game hacks and generators. The primary lure URL is https://netcdn.tw/app/431946152/roblox-free-items-2021-october-game-hack, which is associated with known malicious redirectors. The document body and embedded artifacts do not contain executable scripts, but the presence of malicious links strongly indicates a phishing or scam attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9796

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/roblox-free-items-2021-october-game-hack In PDF document text
    • http://perpus.i2s-learning.com/repository/free-coins-on-coin-master_GM406889139.pdfIn PDF document text
    • http://perpus.i2s-learning.com//repository/hacked-roblox-game_GM431946152.pdfIn PDF document text
    • http://perpus.i2s-learning.com/repository/bhop-hacks-roblox-2021_GM431946152.pdfIn PDF document text
    • http://perpus.i2s-learning.com//repository/free-robux-no-human-verification_GM431946152.pdfIn PDF document text
    • http://perpus.i2s-learning.com/repository/free-robux-with-no-survey_GM431946152.pdfIn PDF document text
    • http://perpus.i2s-learning.com/repository/mcpe-master-hack-unlimited-coins-apk_GM406889139.pdfIn PDF document text
    • http://perpus.i2s-learning.com/repository/coin-master-links-2021_GM406889139.pdfIn PDF document text
    • http://perpus.i2s-learning.com/repository/how-to-get-free-robux-no-gift-card-no-nothing_GM431946152.pdfIn PDF document text
    • http://perpus.i2s-learning.com//repository/free-spins-and-coins-for-coin-master_GM406889139.pdfIn PDF document text
    • http://perpus.i2s-learning.com//repository/coin-master-free-spins-and-coins-blogspot_GM406889139.pdfIn PDF document text
    • http://perpus.i2s-learning.com/repository/daily-free-spins-on-coin-master_GM406889139.pdfIn PDF document text
    • http://perpus.i2s-learning.com//repository/how-to-get-free-spins-on-coin-master-2021_GM406889139.pdfIn PDF document text
    • http://perpus.i2s-learning.com//repository/coin-master-free-spins-link-2021_GM406889139.pdfIn PDF document text
    • http://perpus.i2s-learning.com//repository/how-to-hack-roblox-accounts-2021_GM431946152.pdfIn PDF document text
    • http://perpus.i2s-learning.com//repository/how-to-get-free-robux-website_GM431946152.pdfIn PDF document text
    • http://perpus.i2s-learning.com//repository/robux-websites-that-work_GM431946152.pdfIn PDF document text
    • http://perpus.i2s-learning.com//repository/can-i-download-minecraft-for-free_GM479516143.pdfIn PDF document text
    • http://perpus.i2s-learning.com/repository/claimrbx-free-robux_GM431946152.pdfIn PDF document text
    • http://perpus.i2s-learning.com//repository/coin-master-free-spin-ml_GM406889139.pdfIn PDF document text
    • http://perpus.i2s-learning.com/repository/coin-master-free_GM406889139.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_004_off00004f4b.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4F4B 27460 bytes
SHA-256: 57dfaeed65154ff20d7b394c6affd3e478a615235702984844d002a2ec5f214d
font_01_sfnt_off00008e4f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8E4F 2832 bytes
SHA-256: 77ae1c4cffa647a8fd533dfa4102e94364989f9e80b9cd131876e9d1005899a2
font_02_sfnt_off00009800.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9800 18716 bytes
SHA-256: d11401e45842b52bc9701a70224f133ec9ff3374836a834256148ad8a5b890b0

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