Malicious PDF — malware analysis report

Static analysis result for SHA-256 b240274bbb08a352…

MALICIOUS

PDF

43.2 KB Created: 2021-05-15 01:36:34 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-31
MD5: 5c35634d18a19c77e4ad958c71783902 SHA-1: 41427355fa30af3dee1e8bae8d553dbbd4155215 SHA-256: b240274bbb08a352e9a7e890bee6d7d5a6eceea8cb602f9be4f5bdcae3094c04
220 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF document employs a common lure of free game currency and hacks to entice users. It contains multiple links to known malicious redirectors and potentially malicious PDF files hosted on external domains. The heuristic 'SE_SECRET_RECOVERY_LURE' indicates the document may also attempt to harvest sensitive credentials or recovery phrases, further increasing its risk.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9969

Heuristics 5

  • 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.
  • Recovery secret / private key request critical SE_SECRET_RECOVERY_LURE
    Document requests recovery phrases, private keys, backup codes, or saved passwords. Requests for these secrets in a document are high-risk.
  • 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/406889139/como-conseguir-monedas-infinitas-y-tiradas-de-coin-master-hack-game-hack In PDF document text
    • https://itv-grabungen.de/images/robux-com-free_GM431946152.pdfIn PDF document text
    • https://itv-grabungen.de/images/best-minecraft-hacks_GM479516143.pdfIn PDF document text
    • https://itv-grabungen.de/images/robux-free-robux_GM431946152.pdfIn PDF document text
    • https://itv-grabungen.de/images/free-coin_GM406889139.pdfIn PDF document text
    • https://itv-grabungen.de/images/how-to-get-minecraft-for-free-on-your-phone_GM479516143.pdfIn PDF document text
    • https://itv-grabungen.de/images/how-to-get-minecraft-for-free-on-nintendo-switch_GM479516143.pdfIn PDF document text
    • https://itv-grabungen.de/images/hacks-for-coin-master_GM406889139.pdfIn PDF document text
    • https://itv-grabungen.de/images/coin-master-hack-online-pc_GM406889139.pdfIn PDF document text
    • https://itv-grabungen.de/images/coin-and-spin_GM406889139.pdfIn PDF document text
    • https://itv-grabungen.de/images/hack-xp-net-coin-master_GM406889139.pdfIn PDF document text
    • https://itv-grabungen.de/images/free-spins-coin-master-app-ios_GM406889139.pdfIn PDF document text
    • https://itv-grabungen.de/images/coin-master-free-rare-cards_GM406889139.pdfIn PDF document text
    • https://itv-grabungen.de/images/coin-master-hacks-for-spins_GM406889139.pdfIn PDF document text
    • https://itv-grabungen.de/images/coin-master-mod-version-free-download-ios_GM406889139.pdfIn PDF document text
    • https://itv-grabungen.de/images/coin-master-hack-spins-apk_GM406889139.pdfIn PDF document text
    • https://itv-grabungen.de/images/free-links-coin-master_GM406889139.pdfIn PDF document text
    • https://itv-grabungen.de/images/free-promo-codes-for-roblox-2021_GM431946152.pdfIn PDF document text
    • https://itv-grabungen.de/images/free-robux-youtube_GM431946152.pdfIn PDF document text
    • https://itv-grabungen.de/images/minecraft-for-laptop-free_GM479516143.pdfIn PDF document text
    • https://itv-grabungen.de/images/daily-coin-master-link_GM406889139.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_003_off00004b0c.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4B0C 25548 bytes
SHA-256: 9830cd66b56987689668d92d718f1a29c4a3f92db8d1d50a8a7fec753f4ae497
font_01_sfnt_off000084d3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x84D3 18908 bytes
SHA-256: 22eea22e93e3a2ab8e7a2e6bfe46b3c4bbbdffc0ed3854b3ba75aeac54633c45

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