Malicious PDF — malware analysis report

Static analysis result for SHA-256 f369fe534cea80cd…

MALICIOUS

PDF

35.7 KB Created: 2021-07-07 01:10:44 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-24
MD5: 86ddb943f1b4a5d72d24675077fe5ce0 SHA-1: 7c83594eb0c44d1f032a971e482a11d553987fdc SHA-256: f369fe534cea80cd9f66bb500d644b003833ce98d28485dafc17263cd94b9c3f
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document contains multiple links to known malicious redirectors, disguised as offers for game hacks and free in-game currency. The primary lure is the URL http://netcdn.tw/app/406889139/how-do-i-get-free-coins-in-coin-master-game-hack, which is associated with malicious redirector infrastructure. The document body and embedded links suggest a social engineering tactic to drive traffic to potentially malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

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 http://netcdn.tw/app/406889139/how-do-i-get-free-coins-in-coin-master-game-hack In PDF document text
    • http://apartmani-mestrovic-krk.hr/files/free-roam-openworld-roblox-games_GM431946152.pdfIn PDF document text
    • https://www.apartmani-mestrovic-krk.hr/files/free-robux-2021-no-verification_GM431946152.pdfIn PDF document text
    • http://apartmani-mestrovic-krk.hr/files/web-robux-free_GM431946152.pdfIn PDF document text
    • http://apartmani-mestrovic-krk.hr/files/free-vine-crown-for-roblox_GM431946152.pdfIn PDF document text
    • http://apartmani-mestrovic-krk.hr/files/roblox-plus-download-free_GM431946152.pdfIn PDF document text
    • http://apartmani-mestrovic-krk.hr/files/how-to-get-free-robux-easy-2021-no-human-verification_GM431946152.pdfIn PDF document text
    • http://apartmani-mestrovic-krk.hr/files/roblox-hack-download-pc-free-robux_GM431946152.pdfIn PDF document text
    • https://www.apartmani-mestrovic-krk.hr/files/free-roblox-gift-card-codes-2021-december_GM431946152.pdfIn PDF document text
    • https://www.apartmani-mestrovic-krk.hr/files/coin-master-pet-food-free_GM406889139.pdfIn PDF document text
    • http://apartmani-mestrovic-krk.hr/files/roblox-dragon-ball-z-online-cheats_GM431946152.pdfIn PDF document text
    • http://apartmani-mestrovic-krk.hr/files/trigon-roblox-hack-download_GM431946152.pdfIn PDF document text
    • https://www.apartmani-mestrovic-krk.hr/files/free-roblox-accounts-with-robux-that-work-2021_GM431946152.pdfIn PDF document text
    • http://apartmani-mestrovic-krk.hr/files/roblox-speed-hack-script-pastebin_GM431946152.pdfIn PDF document text
    • https://www.apartmani-mestrovic-krk.hr/files/coin-master-daily-free-spin-app_GM406889139.pdfIn PDF document text
    • https://www.apartmani-mestrovic-krk.hr/files/how-to-get-free-tiktok-followers-without-verification_GM835599320.pdfIn PDF document text
    • http://apartmani-mestrovic-krk.hr/files/coin-master-hack-app-2021_GM406889139.pdfIn PDF document text
    • https://www.apartmani-mestrovic-krk.hr/files/how-to-play-minecraft-with-friends-for-free_GM479516143.pdfIn PDF document text
    • http://apartmani-mestrovic-krk.hr/files/how-to-get-free-robux-on-your-computer_GM431946152.pdfIn PDF document text
    • https://www.apartmani-mestrovic-krk.hr/files/minecraft-fly-hack_GM479516143.pdfIn PDF document text
    • https://www.apartmani-mestrovic-krk.hr/files/free-minecraft-java-server_GM479516143.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_002_off0000335d.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x335D 23540 bytes
SHA-256: 87b116fe991d4d0843b402e0f148613177e2eefa5fc4764b93d4d273adfec827
font_01_sfnt_off000068a3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x68A3 18328 bytes
SHA-256: 1b72113e62650f7fcb08a0ad33bfc479abf41e084b3a9b054d320c4331e51381

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