Malicious PDF — malware analysis report

Static analysis result for SHA-256 2a6d22f55effef32…

MALICIOUS

PDF

44.6 KB Created: 2021-06-04 04:06:13 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-11-02
MD5: f8a415102cfd04f3945600388910344f SHA-1: 6118a5fea8274a39426b10bdffc1dd8c5c05e591 SHA-256: 2a6d22f55effef32d8e2ed76645a171b9bf6e33a276e7266a374473ec0d15a37
220 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains a critical heuristic firing for linking to a known malicious redirector disguised as a game hack generator. The document body, though partially corrupted, contains text related to 'Coin Master Daily Gift' and includes numerous URLs pointing to similar game-related cheats and hacks. This suggests a phishing or credential harvesting attempt, leveraging popular games to trick users into clicking malicious links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9865

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-daily-gift-free-spins-and-coins-link-game-hack In PDF document text
    • http://perpustakaan.sman2bondowoso.sch.id/repository/how-do-you-get-minecraft-for-free_GM479516143.pdfIn PDF document text
    • http://perpustakaan.sman2bondowoso.sch.id/repository/get-robux-for-free-2021_GM431946152.pdfIn PDF document text
    • http://perpustakaan.sman2bondowoso.sch.id/repository/coin-master-hack-no-human-verification-2021_GM406889139.pdfIn PDF document text
    • http://perpustakaan.sman2bondowoso.sch.id/repository/free-spins-coin-master-2021-app_GM406889139.pdfIn PDF document text
    • http://perpustakaan.sman2bondowoso.sch.id/repository/coin-master-in-app-purchase-hack_GM406889139.pdfIn PDF document text
    • http://perpustakaan.sman2bondowoso.sch.id/repository/free-robux-no-human-verification-no-survey_GM431946152.pdfIn PDF document text
    • http://perpustakaan.sman2bondowoso.sch.id/repository/earn-free-robux-on-roblox_GM431946152.pdfIn PDF document text
    • http://perpustakaan.sman2bondowoso.sch.id/repository/create-app-like-tiktok-free_GM835599320.pdfIn PDF document text
    • http://perpustakaan.sman2bondowoso.sch.id/repository/rewards-robux_GM431946152.pdfIn PDF document text
    • http://perpustakaan.sman2bondowoso.sch.id/repository/free-robux-generator-no-survey_GM431946152.pdfIn PDF document text
    • http://perpustakaan.sman2bondowoso.sch.id/repository/real-free-spins-for-coin-master_GM406889139.pdfIn PDF document text
    • http://perpustakaan.sman2bondowoso.sch.id/repository/free-robux-that-actually-works_GM431946152.pdfIn PDF document text
    • http://perpustakaan.sman2bondowoso.sch.id/repository/get-coin-master-cards-free_GM406889139.pdfIn PDF document text
    • http://perpustakaan.sman2bondowoso.sch.id/repository/free-robux-no-survey_GM431946152.pdfIn PDF document text
    • http://perpustakaan.sman2bondowoso.sch.id/repository/coin-master-money-hack_GM406889139.pdfIn PDF document text
    • http://perpustakaan.sman2bondowoso.sch.id/repository/coin-master-hack-2021-iphone_GM406889139.pdfIn PDF document text
    • http://perpustakaan.sman2bondowoso.sch.id/repository/get-free-robux-2021_GM431946152.pdfIn PDF document text
    • http://perpustakaan.sman2bondowoso.sch.id/repository/earn-robux-for-roblox_GM431946152.pdfIn PDF document text
    • http://perpustakaan.sman2bondowoso.sch.id/repository/blogger-free-spins-and-coins_GM406889139.pdfIn PDF document text
    • http://perpustakaan.sman2bondowoso.sch.id/repository/is-minecraft-education-edition-free_GM479516143.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_004_off00004fa0.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4FA0 25508 bytes
SHA-256: 98a8e024a6b008ec3bae40693f60388e8b51fe52ad9e9001f16f3082f886c866
font_01_sfnt_off00008ad0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8AD0 18652 bytes
SHA-256: 366d9c9b3cd0388843e044af578ba3ade018a9e96efb4083e0cc5bdd66e71c38

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