Malicious PDF — malware analysis report

Static analysis result for SHA-256 f90a10e375183062…

MALICIOUS

PDF

43.5 KB Created: 2021-05-11 21:04:18 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-23
MD5: b86214298ef53d4636aedbdde985b94b SHA-1: 031f2f89057a0142bae114571ab5ef640e5839a2 SHA-256: f90a10e3751830621e4aaa79341be33a4ca73898ec5626dd19952c9968bfef26
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document contains multiple links to known malicious redirectors, disguised as "Coin Master" and "Roblox" hacks. The document body, though heavily obfuscated, contains references to these lures and embedded URLs. The primary goal appears to be directing users to potentially malicious websites through these deceptive links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9969

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-links-free-spins-game-hack In PDF document text
    • https://lib.btkljogja.or.id/repository/coin-master-hack-mod-apk-free-download_GM406889139.pdfIn PDF document text
    • https://lib.btkljogja.or.id/repository/coin-master-free-spins-for-iphone_GM406889139.pdfIn PDF document text
    • https://lib.btkljogja.or.id/repository/coin-master-hack-tool-for-pc_GM406889139.pdfIn PDF document text
    • https://lib.btkljogja.or.id/repository/roblox-free-robux-hack_GM431946152.pdfIn PDF document text
    • https://lib.btkljogja.or.id/repository/give-me-free-robux_GM431946152.pdfIn PDF document text
    • https://lib.btkljogja.or.id/repository/john-doe-roblox-hacker_GM431946152.pdfIn PDF document text
    • https://lib.btkljogja.or.id/repository/como-hack-coin-master_GM406889139.pdfIn PDF document text
    • https://lib.btkljogja.or.id/repository/wwwcoin-master-hack-game-download_GM406889139.pdfIn PDF document text
    • https://lib.btkljogja.or.id/repository/hacking-apps-for-roblox_GM431946152.pdfIn PDF document text
    • https://lib.btkljogja.or.id/repository/how-to-get-free-spins-on-coin-master_GM406889139.pdfIn PDF document text
    • https://lib.btkljogja.or.id/repository/free-robux-app-real_GM431946152.pdfIn PDF document text
    • https://lib.btkljogja.or.id/repository/coin-master-hack-without-verification_GM406889139.pdfIn PDF document text
    • https://lib.btkljogja.or.id/repository/free-minecraft-alts_GM479516143.pdfIn PDF document text
    • https://lib.btkljogja.or.id/repository/how-to-get-daily-free-spins-on-coin-master_GM406889139.pdfIn PDF document text
    • https://lib.btkljogja.or.id/repository/free-minecraft-hacks_GM479516143.pdfIn PDF document text
    • https://lib.btkljogja.or.id/repository/coin-master-free-spins-no-verification_GM406889139.pdfIn PDF document text
    • https://lib.btkljogja.or.id/repository/how-do-you-get-free-robux-without-doing-anything_GM431946152.pdfIn PDF document text
    • https://lib.btkljogja.or.id/repository/coin-master-free-spins-link-2021-today_GM406889139.pdfIn PDF document text
    • https://lib.btkljogja.or.id/repository/coin-master-how-to-get-free-pet-food_GM406889139.pdfIn PDF document text
    • https://lib.btkljogja.or.id/repository/coin-master-free-spin-link-today-50_GM406889139.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_off000049bf.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x49BF 29600 bytes
SHA-256: 03f0cb611014f792b9fe8ecfc09b02c3a292f9abdad6352c61ca7ce280d6a5f7
font_01_sfnt_off00008867.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8867 18056 bytes
SHA-256: 95118de0f1fa2d9d8d6d34d7ce9f6e9c56d43c25fce4d2a4bd556d275959b9e0

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