Malicious PDF — malware analysis report

Static analysis result for SHA-256 30921877b46afbf0…

MALICIOUS

PDF

46.4 KB Created: 2021-05-14 02:06:22 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-08-25
MD5: b6d307f4799515a499c30e7f53002060 SHA-1: d79b99c2c84f923d56819cd9148f0c7037826fa1 SHA-256: 30921877b46afbf06ab3c90f2368d98b1f54000b007a796ab48aef8e4314c0de
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple links to known malicious redirectors and lures users with promises of game hacks and free items. The ML classifier also flagged this PDF as malicious. The embedded URLs are designed to lead users to potentially harmful content or further malware downloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8948

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/roblox-free-items-2021-game-hack In PDF document text
    • http://fishtech.is/images/free-old-roblox-accounts_GM431946152.pdfIn PDF document text
    • http://fishtech.is/images/show-me-how-to-get-free-robux_GM431946152.pdfIn PDF document text
    • http://fishtech.is/images/free-spins-coin-master-october-17-2021_GM406889139.pdfIn PDF document text
    • http://fishtech.is/images/rbx-free-robux_GM431946152.pdfIn PDF document text
    • http://fishtech.is/images/best-hack-for-coin-master-2021_GM406889139.pdfIn PDF document text
    • http://fishtech.is/images/synapse-roblox-free_GM431946152.pdfIn PDF document text
    • http://fishtech.is/images/free-robux-no-human-verification-or-survey-2021_GM431946152.pdfIn PDF document text
    • http://fishtech.is/images/easiest-coin-master-hack_GM406889139.pdfIn PDF document text
    • http://fishtech.is/images/coinmasterfree_GM406889139.pdfIn PDF document text
    • http://fishtech.is/images/coin-master-daily-rewards_GM406889139.pdfIn PDF document text
    • http://fishtech.is/images/free-spins-coin-master-ios-links_GM406889139.pdfIn PDF document text
    • http://fishtech.is/images/minecraft-java-code-free_GM479516143.pdfIn PDF document text
    • http://fishtech.is/images/how-to-get-free-spins-on-coin-master-without-verification_GM406889139.pdfIn PDF document text
    • http://fishtech.is/images/how-to-hack-coin-master-in-pc_GM406889139.pdfIn PDF document text
    • http://fishtech.is/images/free-robux-no-offers_GM431946152.pdfIn PDF document text
    • http://fishtech.is/images/free-robux-real-working_GM431946152.pdfIn PDF document text
    • http://fishtech.is/images/coin-master-haktuts_GM406889139.pdfIn PDF document text
    • http://fishtech.is/images/earn-robux-today_GM431946152.pdfIn PDF document text
    • http://fishtech.is/images/robux-free-gift-card_GM431946152.pdfIn PDF document text
    • http://fishtech.is/images/minecraft-java-hacks_GM479516143.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
stream_003_off00004612.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4612 27832 bytes
SHA-256: a46c99079d5f447f30a3c7e40772a9ca0ad9acbd7e3f1283f54c72595d489eab
font_01_sfnt_off0000846f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x846F 5696 bytes
SHA-256: 450e3ee45915afe13702bf1d587eb8b9ad88a8d2113419ac9f2fd116a828e139
font_02_sfnt_off00009181.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9181 18716 bytes
SHA-256: 1ac7dfea826aa1cf6bdd8a8871d75981f44760a1c5f47be9d1d913bfc788d2a8

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