Malicious PDF — malware analysis report

Static analysis result for SHA-256 f0496dc91e8e3ec4…

MALICIOUS

PDF

41.1 KB Created: 2021-05-11 02:16:18 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-11-22
MD5: 325067be11e4ded571f0e88a80916dad SHA-1: c463bf717893fc71347bc6dfe3a78d6e47e5a628 SHA-256: f0496dc91e8e3ec4ce69d7cb0a734858843c36ebdb76f182ab39eff10fbbebda
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document contains multiple links that redirect to malicious infrastructure, masquerading as game hacks or generators. The primary link identified is 'https://netcdn.xyz/app/406889139/master-coin-free-spin-game-hack', which is flagged as a known malicious redirector. The document body and embedded URLs suggest a lure for obtaining in-game currency or cheats, a common tactic for phishing and malware distribution. No scripts were extracted, but the presence of malicious links and the lure indicate a phishing attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9971

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/master-coin-free-spin-game-hack In PDF document text
    • https://encounternepal.com/userfiles/files/200-free-spins-coin-master_GM406889139.pdfIn PDF document text
    • https://encounternepal.com/userfiles/files/coin-master-hack-pc-2021_GM406889139.pdfIn PDF document text
    • https://encounternepal.com/userfiles/files/how-do-you-get-free-robux-2021_GM431946152.pdfIn PDF document text
    • https://encounternepal.com/userfiles/files/can-i-get-minecraft-for-free_GM479516143.pdfIn PDF document text
    • https://encounternepal.com/userfiles/files/free-robux-no-human-verification-or-survey_GM431946152.pdfIn PDF document text
    • https://encounternepal.com/userfiles/files/hack-coin-master-mod-apk_GM406889139.pdfIn PDF document text
    • https://encounternepal.com/userfiles/files/free-ways-to-get-robux_GM431946152.pdfIn PDF document text
    • https://encounternepal.com/userfiles/files/get-free-robux-today_GM431946152.pdfIn PDF document text
    • https://encounternepal.com/userfiles/files/how-to-get-free-robux-on-roblox-2021_GM431946152.pdfIn PDF document text
    • https://encounternepal.com/userfiles/files/how-to-watch-ads-for-free-spins-in-coin-master_GM406889139.pdfIn PDF document text
    • https://encounternepal.com/userfiles/files/free-robux-codes_GM431946152.pdfIn PDF document text
    • https://encounternepal.com/userfiles/files/free-robux-gift-card-generator_GM431946152.pdfIn PDF document text
    • https://encounternepal.com/userfiles/files/coin-master-free-daily-spins-and-coins_GM406889139.pdfIn PDF document text
    • https://encounternepal.com/userfiles/files/free-robux-no-human-verify_GM431946152.pdfIn PDF document text
    • https://encounternepal.com/userfiles/files/how-to-hack-into-someones-roblox-account_GM431946152.pdfIn PDF document text
    • https://encounternepal.com/userfiles/files/free-spin-coin-master-app-download_GM406889139.pdfIn PDF document text
    • https://encounternepal.com/userfiles/files/free-coins-coin-master_GM406889139.pdfIn PDF document text
    • https://encounternepal.com/userfiles/files/coin-master-hacks-android_GM406889139.pdfIn PDF document text
    • https://encounternepal.com/userfiles/files/coin-master-hack-account_GM406889139.pdfIn PDF document text
    • https://encounternepal.com/userfiles/files/claim-robux_GM431946152.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_off000048d2.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x48D2 24112 bytes
SHA-256: c1482d99ab60c8b9d575cea3caf7c996cd579df848ab27dfe82b40c73a5ed736
font_01_sfnt_off00007f99.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7F99 17884 bytes
SHA-256: 2eace5707960ab6674c345fc5925bb74d79b72c9d0e947ec779627780b9711cb

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