Malicious PDF — malware analysis report

Static analysis result for SHA-256 cfbca865790ed2f3…

MALICIOUS

PDF

45.1 KB Created: 2021-06-03 12:33:35 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-11-21
MD5: 7600bb2ada5c536095bb9470beb90366 SHA-1: ae787d9961c11ce80ef6876d5aecf2d380654354 SHA-256: cfbca865790ed2f37b14ce3e8b51bdbebc858df33da2d49f33b30038401ad095
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple links to external URLs, including one identified as a malicious redirector, which is designed to lure users into downloading potentially unwanted or malicious software. The document body and heuristics indicate a deceptive lure related to game hacks and generators, suggesting a phishing or social engineering attack. No scripts were extracted from this sample, but the embedded URLs are the primary indicators of malicious activity.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9865

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.online/app/479516143/minecraft-114-download-game-hack In PDF document text
    • http://www.otomasi.uinjambi.ac.id/repository/coinmaster-rewards_GM406889139.pdfIn PDF document text
    • http://www.otomasi.uinjambi.ac.id/repository/boost9-com-roblox-hack_GM431946152.pdfIn PDF document text
    • http://www.otomasi.uinjambi.ac.id/repository/coin-master-hack-programmers_GM406889139.pdfIn PDF document text
    • http://www.otomasi.uinjambi.ac.id/repository/hack-coin-master-iphone_GM406889139.pdfIn PDF document text
    • http://www.otomasi.uinjambi.ac.id/repository/when-was-minecraft-free_GM479516143.pdfIn PDF document text
    • http://www.otomasi.uinjambi.ac.id/repository/www-roblox-com-robux-free_GM431946152.pdfIn PDF document text
    • http://www.otomasi.uinjambi.ac.id/repository/tiktok-minecraft-hacks_GM479516143.pdfIn PDF document text
    • http://www.otomasi.uinjambi.ac.id/repository/free-robux-place_GM431946152.pdfIn PDF document text
    • http://www.otomasi.uinjambi.ac.id/repository/free-coin-master-cards_GM406889139.pdfIn PDF document text
    • http://www.otomasi.uinjambi.ac.id/repository/coin-master-extra-spins_GM406889139.pdfIn PDF document text
    • http://www.otomasi.uinjambi.ac.id/repository/can-i-play-roblox-for-free_GM431946152.pdfIn PDF document text
    • http://www.otomasi.uinjambi.ac.id/repository/free-roblox-boy-hair_GM431946152.pdfIn PDF document text
    • http://www.otomasi.uinjambi.ac.id/repository/easy-points-gg_GM431946152.pdfIn PDF document text
    • http://www.otomasi.uinjambi.ac.id/repository/coin-master-cards-free_GM406889139.pdfIn PDF document text
    • http://www.otomasi.uinjambi.ac.id/repository/coin-master-hack-100-working_GM406889139.pdfIn PDF document text
    • http://www.otomasi.uinjambi.ac.id/repository/free-robux-no-download_GM431946152.pdfIn PDF document text
    • http://www.otomasi.uinjambi.ac.id/repository/como-hackear-coin-master-2021_GM406889139.pdfIn PDF document text
    • http://www.otomasi.uinjambi.ac.id/repository/real-free-robux-codes_GM431946152.pdfIn PDF document text
    • http://www.otomasi.uinjambi.ac.id/repository/coin-master-free-spins-no-generator_GM406889139.pdfIn PDF document text
    • http://www.otomasi.uinjambi.ac.id/repository/earn-rbx_GM431946152.pdfIn PDF document text
    • https://discord.ggIn 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_off000053d2.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x53D2 25428 bytes
SHA-256: ecb2bbe1451dca42e384e43648e12cfe25f5b815c1c3df2e27fdc2ac742723b7
font_01_sfnt_off00008d1b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8D1B 18460 bytes
SHA-256: f31f00f072c4c0f7507ec5fb42d1fedb33e944277bd3ae629218294143e3c054

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