Malicious PDF — malware analysis report

Static analysis result for SHA-256 89500cc31bc9ea9a…

MALICIOUS

PDF

48.4 KB Created: 2021-06-03 13:18:05 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-23
MD5: 180b607604b4a1a94576a71bdba25903 SHA-1: 9f6bc223ebd465f99993c0a34a154a47e1899d12 SHA-256: 89500cc31bc9ea9a766515e5f4fc375cad694e35acd8eb81696085b912e553de
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a lure for free game items, specifically mentioning 'Coin Master' and 'game hack', which is a common social engineering tactic. It embeds a URL that is flagged as a malicious redirector, likely leading to further malicious content or downloads. The ML classifier also strongly indicated maliciousness.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9796

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/406889139/i-need-more-free-spins-on-coin-master-game-hack In PDF document text
    • https://library.sttbandung.ac.id/repository/minecraft-world-free-download_GM479516143.pdfIn PDF document text
    • https://library.sttbandung.ac.id/repository/minecraft-tower-defense-hacked_GM479516143.pdfIn PDF document text
    • https://library.sttbandung.ac.id/repository/how-to-get-a-cape-in-minecraft-for-free_GM479516143.pdfIn PDF document text
    • https://library.sttbandung.ac.id/repository/xray-mod-minecraft-114_GM479516143.pdfIn PDF document text
    • https://library.sttbandung.ac.id/repository/roblox-promo-codes-free-robux_GM431946152.pdfIn PDF document text
    • https://library.sttbandung.ac.id/repository/free-robux-no-offers_GM431946152.pdfIn PDF document text
    • https://library.sttbandung.ac.id/repository/how-to-get-free-robux-2021-easy_GM431946152.pdfIn PDF document text
    • https://library.sttbandung.ac.id/repository/minecraft-svg-images-free_GM479516143.pdfIn PDF document text
    • https://library.sttbandung.ac.id/repository/tiktok-free-beer-for-a-year_GM835599320.pdfIn PDF document text
    • https://library.sttbandung.ac.id/repository/free-printable-roblox-images_GM431946152.pdfIn PDF document text
    • https://library.sttbandung.ac.id/repository/roblox-fun-com-free-robux_GM431946152.pdfIn PDF document text
    • https://library.sttbandung.ac.id/repository/pokemon-go-free-90-fps_GM1094591345.pdfIn PDF document text
    • https://library.sttbandung.ac.id/repository/free-robux-com-roblox_GM431946152.pdfIn PDF document text
    • https://library.sttbandung.ac.id/repository/hacker-minecraft-song_GM479516143.pdfIn PDF document text
    • https://library.sttbandung.ac.id/repository/how-to-hack-roblox_GM431946152.pdfIn PDF document text
    • https://library.sttbandung.ac.id/repository/minecraft-coins-free_GM479516143.pdfIn PDF document text
    • https://library.sttbandung.ac.id/repository/easy-how-to-get-free-robux_GM431946152.pdfIn PDF document text
    • https://library.sttbandung.ac.id/repository/free-robux-obby_GM431946152.pdfIn PDF document text
    • https://library.sttbandung.ac.id/repository/free-minecraft-windows-10-with-java_GM479516143.pdfIn PDF document text
    • https://library.sttbandung.ac.id/repository/avatar-de-roblox_GM431946152.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_off00005399.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x5399 26748 bytes
SHA-256: 0b6f2cf8a4cc1748da19bc7e0df216d487329814aadc1ccbcf365baa273bad6d
font_01_sfnt_off00009015.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9015 3400 bytes
SHA-256: 75c3a8e6f5c68e0746f893c922e57fd7e888a21fb038f9ae3eedb0a197a59e24
font_02_sfnt_off00009b39.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9B39 18060 bytes
SHA-256: ad4285fb5a52de3974d4505312da4d4cfb1c9ac2c9b172831f0c962a0fab101d

Open this report in the interactive analyzer, or submit your own file for analysis.