Malicious PDF — malware analysis report

Static analysis result for SHA-256 7ba788502162c9b5…

MALICIOUS

PDF

46.0 KB Created: 2021-05-12 12:00:48 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-11-20
MD5: 66b1822480bdcfbb63d2927164ecd4d9 SHA-1: 21004698253727d972c1bf676eb1391c1061fb46 SHA-256: 7ba788502162c9b5097154c9e4de30d5fbe135241771c91fe42f04485b0d2ff6
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document contains multiple links to known malicious redirectors, disguised as 'free generators' for popular games. The document body, though heavily obfuscated, contains references to these lures and embedded URLs. The primary malicious activity observed is the redirection to potentially harmful websites, likely for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9432

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/406889139/coin-master-hack-online-without-human-verification-game-hack In PDF document text
    • http://fia.ub.ac.id/katalog/repository/best-way-to-hack-coin-master_GM406889139.pdfIn PDF document text
    • http://fia.ub.ac.id/katalog/repository/xray-hack_GM479516143.pdfIn PDF document text
    • http://fia.ub.ac.id/katalog/repository/coin-master-game-download-free_GM406889139.pdfIn PDF document text
    • http://fia.ub.ac.id/katalog/repository/boku-no-roblox-hack_GM431946152.pdfIn PDF document text
    • http://fia.ub.ac.id/katalog/repository/free-magical-chest-coin-master_GM406889139.pdfIn PDF document text
    • http://fia.ub.ac.id/katalog/repository/coin-master-free-link-2021_GM406889139.pdfIn PDF document text
    • http://fia.ub.ac.id/katalog/repository/coin-master-free-spins-generator-no-verification_GM406889139.pdfIn PDF document text
    • http://fia.ub.ac.id/katalog/repository/best-hacked-client_GM479516143.pdfIn PDF document text
    • http://fia.ub.ac.id/katalog/repository/free-spins-coin-master-daily_GM406889139.pdfIn PDF document text
    • http://fia.ub.ac.id/katalog/repository/free-minecraft-hacks_GM479516143.pdfIn PDF document text
    • http://fia.ub.ac.id/katalog/repository/coin-master-free-spin-bonus_GM406889139.pdfIn PDF document text
    • http://fia.ub.ac.id/katalog/repository/coin-master-hack-2021-without-human-verification_GM406889139.pdfIn PDF document text
    • http://fia.ub.ac.id/katalog/repository/free-role-in-coin-master_GM406889139.pdfIn PDF document text
    • http://fia.ub.ac.id/katalog/repository/free-robux-generator-no-human-verification_GM431946152.pdfIn PDF document text
    • http://fia.ub.ac.id/katalog/repository/unlimited-free-spins-coin-master_GM406889139.pdfIn PDF document text
    • http://fia.ub.ac.id/katalog/repository/real-robux-generator-2021_GM431946152.pdfIn PDF document text
    • http://fia.ub.ac.id/katalog/repository/how-to-hack-minecraft-pe_GM479516143.pdfIn PDF document text
    • http://fia.ub.ac.id/katalog/repository/free-coin-master-spins-2021_GM406889139.pdfIn PDF document text
    • http://fia.ub.ac.id/katalog/repository/free-coins-coin-master-no-human-verification_GM406889139.pdfIn PDF document text
    • http://fia.ub.ac.id/katalog/repository/free-coin-master-links_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_003_off00004de4.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4DE4 24692 bytes
SHA-256: 94f5276711d01bc4dfbe9bd68b07a4b2e67f0e9b9c39349e5df743bcaf3a1835
font_01_sfnt_off00008668.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8668 2880 bytes
SHA-256: 10d025f04f706eb71cdda4f99784df1b9ccb52e48080e43095e0398eaef6f132
font_02_sfnt_off00009052.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9052 18688 bytes
SHA-256: 4aaaba9fe6ed58f9b8b1a0433af0e5366d33adc18d760eeacae6851e704aacd8

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