Malicious PDF — malware analysis report

Static analysis result for SHA-256 88efae25727e9ec9…

MALICIOUS

PDF

45.1 KB Created: 2021-06-09 16:24:13 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-13
MD5: 01cdc21de5e97714d31019f87e00e94d SHA-1: abe8e04a8cc3a6e62274eed6a1f58c78af2db1dc SHA-256: 88efae25727e9ec9deafc3b9147f367cced5113efff5ca8d4159bd25ad2478e5
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a lure for a 'free generator / game hack' which redirects to a malicious URL. The document body, though partially corrupted, contains text related to obtaining Robux and a URL that matches the heuristic findings. The presence of embedded URLs and the nature of the lure suggest a phishing attempt to redirect users to potentially malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9865

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-get-50-000-robux-for-free-game-hack In PDF document text
    • http://library.yamasi.ac.id//repository/free-robux-generator-2021_GM431946152.pdfIn PDF document text
    • http://library.yamasi.ac.id//repository/coin-master-link-daily-get-free-spins-and-coins_GM406889139.pdfIn PDF document text
    • http://library.yamasi.ac.id/repository/pokemon-go-free-games-online_GM1094591345.pdfIn PDF document text
    • http://library.yamasi.ac.id//repository/master-coin-free-spin-daily_GM406889139.pdfIn PDF document text
    • http://library.yamasi.ac.id/repository/minecraft-free-download-android_GM479516143.pdfIn PDF document text
    • http://library.yamasi.ac.id/repository/avatar-roblox-game_GM431946152.pdfIn PDF document text
    • http://library.yamasi.ac.id//repository/how-to-get-free-minecraft-alts_GM479516143.pdfIn PDF document text
    • http://library.yamasi.ac.id//repository/roblox-redeem_GM431946152.pdfIn PDF document text
    • http://library.yamasi.ac.id//repository/can-you-still-get-minecraft-windows-10-for-free_GM479516143.pdfIn PDF document text
    • http://library.yamasi.ac.id//repository/free-minecraft-videos_GM479516143.pdfIn PDF document text
    • http://library.yamasi.ac.id/repository/free-promo-codes-2021-october-roblox_GM431946152.pdfIn PDF document text
    • http://library.yamasi.ac.id//repository/coin-master-daily-free-spins-and-coins-2021_GM406889139.pdfIn PDF document text
    • http://library.yamasi.ac.id/repository/coin-master-2021-free-spins-link-2021_GM406889139.pdfIn PDF document text
    • http://library.yamasi.ac.id/repository/master-free-spin-and-coin-link_GM406889139.pdfIn PDF document text
    • http://library.yamasi.ac.id//repository/coin-master-free-spins-link-no-verification-2021_GM406889139.pdfIn PDF document text
    • http://library.yamasi.ac.id/repository/coin-master-coin-hack_GM406889139.pdfIn PDF document text
    • http://library.yamasi.ac.id//repository/huskybuscom-free-robux_GM431946152.pdfIn PDF document text
    • http://library.yamasi.ac.id//repository/free-minecraft-thumbnails_GM479516143.pdfIn PDF document text
    • http://library.yamasi.ac.id//repository/how-to-get-free-spins-on-coin-master-blogspot_GM406889139.pdfIn PDF document text
    • http://library.yamasi.ac.id//repository/get-free-spins-coin-master-october-2021_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_004_off0000537e.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x537E 25276 bytes
SHA-256: d22cda9709246369d10938a58d28b45d4911bd18386b8dc8139c909e808cba53
font_01_sfnt_off00008ca3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8CA3 18588 bytes
SHA-256: be08576bf07943caad54e2a2ddde37e9003a9787bd5e4f45a067198a77eebb3c

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