Malicious PDF — malware analysis report

Static analysis result for SHA-256 5afc1b3c38c0d4c8…

MALICIOUS

PDF

45.2 KB Created: 2021-06-13 19:36:49 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-13
MD5: 460531fcd5fb19a4c5eb8e7559ae6c9e SHA-1: ad3386a1e088ee64b0369533d4340a1b6ec69abe SHA-256: 5afc1b3c38c0d4c8d886662e30a67918f37f444fedd8fb81a4354445f09e8261
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple links to known malicious redirectors and infrastructure, disguised as "game hacks" or "free currency generators." The primary malicious link, http://netcdn.co/app/431946152/kuso-ico-roblox-hack-game-hack, is associated with a lure for game-related cheats. The presence of multiple redirector links and a high ML classifier score indicate a strong likelihood of malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9621

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.co/app/431946152/kuso-ico-roblox-hack-game-hack In PDF document text
    • http://muslib.unmus.ac.id//repository/coin-master-unlimited-spin-hack-apk_GM406889139.pdfIn PDF document text
    • http://muslib.unmus.ac.id//repository/coin-master-free-spins-hack_GM406889139.pdfIn PDF document text
    • http://muslib.unmus.ac.id/repository/free-coins-coin-master-hack_GM406889139.pdfIn PDF document text
    • http://muslib.unmus.ac.id/repository/how-to-get-free-tiktok-followers-without-human-verification_GM835599320.pdfIn PDF document text
    • http://muslib.unmus.ac.id//repository/roblox-fun-com-free-robux_GM431946152.pdfIn PDF document text
    • http://muslib.unmus.ac.id/repository/free-robux-card-codes_GM431946152.pdfIn PDF document text
    • http://muslib.unmus.ac.id/repository/robux-sign_GM431946152.pdfIn PDF document text
    • http://muslib.unmus.ac.id/repository/how-do-i-get-free-spins-on-coin-master_GM406889139.pdfIn PDF document text
    • http://muslib.unmus.ac.id//repository/orewards-com-free-robux_GM431946152.pdfIn PDF document text
    • http://muslib.unmus.ac.id/repository/free-generator_GM431946152.pdfIn PDF document text
    • http://muslib.unmus.ac.id//repository/earn-free-spins-coin-master_GM406889139.pdfIn PDF document text
    • http://muslib.unmus.ac.id//repository/how-to-get-free-robux-without-any-verification_GM431946152.pdfIn PDF document text
    • http://muslib.unmus.ac.id/repository/body-roblox_GM431946152.pdfIn PDF document text
    • http://muslib.unmus.ac.id//repository/game-coin-master-hack_GM406889139.pdfIn PDF document text
    • http://muslib.unmus.ac.id/repository/all-free-items-in-roblox_GM431946152.pdfIn PDF document text
    • http://muslib.unmus.ac.id//repository/tiradas-coin-master_GM406889139.pdfIn PDF document text
    • http://muslib.unmus.ac.id//repository/minecraft-life-hacks_GM479516143.pdfIn PDF document text
    • http://muslib.unmus.ac.id/repository/free-robux-codes-2021_GM431946152.pdfIn PDF document text
    • http://muslib.unmus.ac.id/repository/minecraft-rtx-download-free_GM479516143.pdfIn PDF document text
    • http://muslib.unmus.ac.id//repository/coin-master-free-spins-link-facebook-page_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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000494e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x494E 25364 bytes
SHA-256: 84ccb7278245a0145c6442a43fe1e2fba04f047c53da0646bf662fbf3a8f106d
font_01_sfnt_off00008420.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8420 2824 bytes
SHA-256: 94c1b019735d7e491765340abe50b2897410e2ec65ecf141c08bd9f2220897c4
font_02_sfnt_off00008dce.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8DCE 18320 bytes
SHA-256: 67b96beca271d5ff8db6d4205f4bcb305d403275eb03eb731bd8bb208d3be0d2

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