Malicious PDF — malware analysis report

Static analysis result for SHA-256 5e78f97c93183c4d…

MALICIOUS

PDF

44.0 KB Created: 2021-05-11 20:50:27 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-11-20
MD5: 401f144ef08d497993a9c7eb9227d509 SHA-1: 64a0fb053f194ca6ec6c2d0031b82b9ef2044c0e SHA-256: 5e78f97c93183c4d74f61a367c8c9335cb3c8d2e036e6a7951f9b52d86c8d59b
180 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple links to known malicious redirectors and websites offering game hacks, indicative of a phishing or scam lure. The heuristic firings strongly suggest the document's purpose is to redirect users to potentially harmful content. While no scripts were directly extracted, the embedded URLs and the nature of the lures point towards a malicious intent to lead users to exploit or scam sites.

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.
  • Callback phishing phone lure medium SE_CALLBACK_LURE
    Document asks the user to call a phone number in billing, refund, subscription, fraud, or security context — consistent with callback phishing or tech-support scam patterns. Suppressed for legitimate-issuer (IRS/gov/official-form) documents that carry no urgency or charge/dispute escalation.
  • 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/mistplay-robux-game-hack In PDF document text
    • http://www.pleiadisrl.it/images/free-coins-spins-on-coin-master_GM406889139.pdfIn PDF document text
    • http://www.pleiadisrl.it/images/coin-master-hack-without-verification-code_GM406889139.pdfIn PDF document text
    • http://www.pleiadisrl.it/images/how-to-hack-roblox-accounts-on-phone_GM431946152.pdfIn PDF document text
    • http://www.pleiadisrl.it/images/coin-master-3rd-village-free-2021-gift-card_GM406889139.pdfIn PDF document text
    • http://www.pleiadisrl.it/images/roblox-com-games-referrer-roblox-player_GM431946152.pdfIn PDF document text
    • http://www.pleiadisrl.it/images/free-free-robux_GM431946152.pdfIn PDF document text
    • http://www.pleiadisrl.it/images/minecraft-survival-hacks_GM479516143.pdfIn PDF document text
    • http://www.pleiadisrl.it/images/roblox-c9m_GM431946152.pdfIn PDF document text
    • http://www.pleiadisrl.it/images/20210-free-spin-links-for-coin-master_GM406889139.pdfIn PDF document text
    • http://www.pleiadisrl.it/images/free-robux-scams_GM431946152.pdfIn PDF document text
    • http://www.pleiadisrl.it/images/how-do-u-get-free-robux-2021_GM431946152.pdfIn PDF document text
    • http://www.pleiadisrl.it/images/minecraft-free-download-mac_GM479516143.pdfIn PDF document text
    • http://www.pleiadisrl.it/images/roblox-free-robux-codes_GM431946152.pdfIn PDF document text
    • http://www.pleiadisrl.it/images/www-free-robux_GM431946152.pdfIn PDF document text
    • http://www.pleiadisrl.it/images/roblox-fun-com-free-robux_GM431946152.pdfIn PDF document text
    • http://www.pleiadisrl.it/images/free-robux-roblox-promo-codes_GM431946152.pdfIn PDF document text
    • http://www.pleiadisrl.it/images/coin-master-hacks-that-actually-work_GM406889139.pdfIn PDF document text
    • http://www.pleiadisrl.it/images/free-minecraft-skins-ps4_GM479516143.pdfIn PDF document text
    • http://www.pleiadisrl.it/images/coin-master-free-cards-link-2021_GM406889139.pdfIn PDF document text
    • http://www.pleiadisrl.it/images/free-robux-generator-no-human-verification-or-survey-2021_GM431946152.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_off0000490e.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x490E 26512 bytes
SHA-256: 0ea206e68493d95327fe8801643080b59a414ea9ed73c0ba031523633313599d
font_01_sfnt_off0000879f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x879F 18928 bytes
SHA-256: 4353d9d8b624be656c092b8c8f3622dfb05908b0fd9cf93c1f73531fdc9e42e9

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