Malicious PDF — malware analysis report

Static analysis result for SHA-256 92d2e1da31aa9f3b…

MALICIOUS

PDF

47.8 KB Created: 2021-06-03 05:10:58 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-11-20
MD5: b6274143f397665b607e9a13e0663613 SHA-1: beb6a146d5021409e6d639d4cc0ed4d3332bc4fa SHA-256: 92d2e1da31aa9f3bce877882dd678df9fa3e6240fcebe78b2e7a216d4f4ffe91
220 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document employs a lure related to game hacks and free currency to trick users into clicking embedded links. The primary link directs to a known malicious redirector, indicating a phishing or scam attempt. The document body and embedded URLs suggest the intent is to lead users to potentially malicious websites, possibly for credential harvesting or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9769

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.online/app/406889139/coin-master-free-coins-and-spins-hack-game-hack In PDF document text
    • https://pustaka.mic.sch.id//repository/earn-robux-sites_GM431946152.pdfIn PDF document text
    • https://pustaka.mic.sch.id/repository/coin-master-free-spins-blogspot_GM406889139.pdfIn PDF document text
    • https://pustaka.mic.sch.id//repository/login-robux_GM431946152.pdfIn PDF document text
    • https://pustaka.mic.sch.id//repository/game-hack-coin-master_GM406889139.pdfIn PDF document text
    • https://pustaka.mic.sch.id//repository/how-to-hack-roblox-games_GM431946152.pdfIn PDF document text
    • https://pustaka.mic.sch.id/repository/roblox-prison-life-20-hack-download_GM431946152.pdfIn PDF document text
    • https://pustaka.mic.sch.id//repository/coin-master-free-coins-2021_GM406889139.pdfIn PDF document text
    • https://pustaka.mic.sch.id//repository/coin-master-free-spin-and-coins-links-home_GM406889139.pdfIn PDF document text
    • https://pustaka.mic.sch.id//repository/how-to-get-free-robux-without-doing-anything_GM431946152.pdfIn PDF document text
    • https://pustaka.mic.sch.id//repository/minecraft-alt-accounts-free_GM479516143.pdfIn PDF document text
    • https://pustaka.mic.sch.id//repository/free-robux-websites-2021_GM431946152.pdfIn PDF document text
    • https://pustaka.mic.sch.id//repository/coin-master-free-spins-android_GM406889139.pdfIn PDF document text
    • https://pustaka.mic.sch.id//repository/free-domain-for-minecraft-server_GM479516143.pdfIn PDF document text
    • https://pustaka.mic.sch.id//repository/robux-gift-card-free_GM431946152.pdfIn PDF document text
    • https://pustaka.mic.sch.id//repository/real-free-robux-codes_GM431946152.pdfIn PDF document text
    • https://pustaka.mic.sch.id//repository/free-robux-websites-that-actually-work-2021_GM431946152.pdfIn PDF document text
    • https://pustaka.mic.sch.id//repository/how-to-get-free-robux-on-chromebook_GM431946152.pdfIn PDF document text
    • https://pustaka.mic.sch.id//repository/hack-coin-master-nyc_GM406889139.pdfIn PDF document text
    • https://pustaka.mic.sch.id//repository/hey-google-how-do-you-get-free-robux_GM431946152.pdfIn PDF document text
    • https://pustaka.mic.sch.id//repository/blogger-coin-master-free-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_004_off00004f9d.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4F9D 28420 bytes
SHA-256: 2e8002147b692a92d2d6f41e211b285b360665b45b33914e081864251651908d
font_01_sfnt_off00008ecf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8ECF 2840 bytes
SHA-256: 30dce2b9c1950da345d7fed8f00c38887adfa2f2ddecc31775af2315e819ac37
font_02_sfnt_off00009882.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9882 18228 bytes
SHA-256: 354d04eea8306255969a9ffde93a2dc9fe516d06f825e89064d5817ccb1fcce8

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