Malicious PDF — malware analysis report

Static analysis result for SHA-256 c6992f96318e3de3…

MALICIOUS

PDF

46.1 KB Created: 2021-06-03 06:22:06 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-11-23
MD5: 92bb76fbcd32867416a1f1490a5238dc SHA-1: adb327f79fd98f23c021a88c747a7f41f25a580f SHA-256: c6992f96318e3de3da3a70d91d12a2e4f8484e37b8bd04ffc1b72f1f1c84527d
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document contains multiple links that redirect to a malicious domain, masquerading as a 'free generator / game hack'. The heuristic firings indicate that the PDF is designed to lure users into clicking these links, likely to download a second-stage payload or engage in other malicious activities. The presence of embedded URLs and a download button lure further supports this malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9797

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/coin-master-free-spins-link-download-today-game-hack In PDF document text
    • https://library.stikesmi.ac.id/repository/how-to-watch-ads-for-free-spins-in-coin-master_GM406889139.pdfIn PDF document text
    • https://library.stikesmi.ac.id/repository/free-robux-on-phone_GM431946152.pdfIn PDF document text
    • https://library.stikesmi.ac.id/repository/facebook-coin-master-hack_GM406889139.pdfIn PDF document text
    • https://library.stikesmi.ac.id/repository/free-spins-on-coin-master-hack_GM406889139.pdfIn PDF document text
    • https://library.stikesmi.ac.id/repository/coin-master-free-spins-cheat_GM406889139.pdfIn PDF document text
    • https://library.stikesmi.ac.id/repository/completed-coin-master-hack_GM406889139.pdfIn PDF document text
    • https://library.stikesmi.ac.id/repository/free-appsfor-coin-master-daily-rewards_GM406889139.pdfIn PDF document text
    • https://library.stikesmi.ac.id/repository/my-robux_GM431946152.pdfIn PDF document text
    • https://library.stikesmi.ac.id/repository/coin-master-hackcom-xyz_GM406889139.pdfIn PDF document text
    • https://library.stikesmi.ac.id/repository/coin-master-jackpot-hack_GM406889139.pdfIn PDF document text
    • https://library.stikesmi.ac.id/repository/coin-master-free-spins-may-11-2021_GM406889139.pdfIn PDF document text
    • https://library.stikesmi.ac.id/repository/free-spins-on-coin-master-app_GM406889139.pdfIn PDF document text
    • https://library.stikesmi.ac.id/repository/pubg-uc-60_GM1330123889.pdfIn PDF document text
    • https://library.stikesmi.ac.id/repository/pop-slots-free-vegas-casino-slots-machine-game-coin-master_GM406889139.pdfIn PDF document text
    • https://library.stikesmi.ac.id/repository/without-pokemon-go-free-account_GM1094591345.pdfIn PDF document text
    • https://library.stikesmi.ac.id/repository/minecraft-hacks_GM479516143.pdfIn PDF document text
    • https://library.stikesmi.ac.id/repository/hack-card-collection-coin-master_GM406889139.pdfIn PDF document text
    • https://library.stikesmi.ac.id/repository/coin-master-download_GM406889139.pdfIn PDF document text
    • https://library.stikesmi.ac.id/repository/how-can-i-get-free-robux_GM431946152.pdfIn PDF document text
    • https://library.stikesmi.ac.id/repository/http-bit-ly-coin-master-hack_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_004_off00004e24.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4E24 24244 bytes
SHA-256: 2ac70f6911bfe71b0351f86327bb148add1eb61ecae47f92aa60308a2b046ea6
font_01_sfnt_off000085cf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x85CF 2820 bytes
SHA-256: e5f6ec650849eefe6bc6a1649c2875ce35328d23e4196945bba66cc43e5a49d4
font_02_sfnt_off00008f6e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8F6E 18816 bytes
SHA-256: 7984ac734f2c2edb41e517847f194607c55f1e409037ad7870af27278dae38db

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