Malicious PDF — malware analysis report

Static analysis result for SHA-256 ea92131a8b5e6d87…

MALICIOUS

PDF

45.9 KB Created: 2021-05-12 01:35:01 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-24
MD5: 7eb5dd78ac395f9397b23a7eafffc2c9 SHA-1: a456ee6ff8e65ccca21ee54dfd9e7f9ed2ea1d50 SHA-256: ea92131a8b5e6d87ebd040fb8658af304cd28e45f6229535cd19701cf2cc8f74
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains a lure related to free in-game currency, directing users to a known malicious redirector URL. This suggests a phishing or scam attempt designed to lead users to potentially harmful content or further malicious downloads. No scripts were extracted, but the embedded URL is the primary indicator of malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9432

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.xyz/app/431946152/make-free-robux-game-hack In PDF document text
    • https://library.stikesmi.ac.id/repository/game-hunters-coin-master-free-spins_GM406889139.pdfIn PDF document text
    • https://library.stikesmi.ac.id/repository/minecraft-pe-apk-download-free-015-0_GM479516143.pdfIn PDF document text
    • https://library.stikesmi.ac.id/repository/robuxy-com-free-robux_GM431946152.pdfIn PDF document text
    • https://library.stikesmi.ac.id/repository/free-robux-no-survey-or-human-verification_GM431946152.pdfIn PDF document text
    • https://library.stikesmi.ac.id/repository/coin-and-spin_GM406889139.pdfIn PDF document text
    • https://library.stikesmi.ac.id/repository/coin-master-gold-cards-free_GM406889139.pdfIn PDF document text
    • https://library.stikesmi.ac.id/repository/coin-master-free-spins-only_GM406889139.pdfIn PDF document text
    • https://library.stikesmi.ac.id/repository/mcpe-master-hack-unlimited-coins_GM406889139.pdfIn PDF document text
    • https://library.stikesmi.ac.id/repository/coin-master-hack-apk-35-18_GM406889139.pdfIn PDF document text
    • https://library.stikesmi.ac.id/repository/free-robux-on-phone_GM431946152.pdfIn PDF document text
    • https://library.stikesmi.ac.id/repository/master-free-spins-and-coins_GM406889139.pdfIn PDF document text
    • https://library.stikesmi.ac.id/repository/coin-master-website_GM406889139.pdfIn PDF document text
    • https://library.stikesmi.ac.id/repository/coin-master-free-link_GM406889139.pdfIn PDF document text
    • https://library.stikesmi.ac.id/repository/free-robux-mobile_GM431946152.pdfIn PDF document text
    • https://library.stikesmi.ac.id/repository/how-to-get-100-robux-for-free_GM431946152.pdfIn PDF document text
    • https://library.stikesmi.ac.id/repository/get-free-spins-coin-master_GM406889139.pdfIn PDF document text
    • https://library.stikesmi.ac.id/repository/how-to-download-minecraft-for-free-on-android_GM479516143.pdfIn PDF document text
    • https://library.stikesmi.ac.id/repository/coin-master-claim-spins_GM406889139.pdfIn PDF document text
    • https://library.stikesmi.ac.id/repository/microsoft-rewards-robux_GM431946152.pdfIn PDF document text
    • https://library.stikesmi.ac.id/repository/coin-master-daily-spins_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_003_off000046e9.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x46E9 24700 bytes
SHA-256: 7de231ac8293647778ef7e33ce0f79d4770a4e5834ecfbb5d01773d5affadf99
font_01_sfnt_off00007fdf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7FDF 6700 bytes
SHA-256: ae114634718854704d615808d33fb1b747d90eb28e420080bd5adbdfe7fb6a27
font_02_sfnt_off0000901c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x901C 18608 bytes
SHA-256: ffc801fe6c311414aab45f29f725ac19f85306497fb99419c1a1229f9950fbca

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