Malicious PDF — malware analysis report

Static analysis result for SHA-256 b9f49d22c9f2e177…

MALICIOUS

PDF

34.8 KB Created: 2021-07-04 10:40:42 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-11-02
MD5: ec4a5724fab87120c1a09f9515d4755e SHA-1: 74cfbef873ba2d166dd444df8008b089758ca318 SHA-256: b9f49d22c9f2e17771ba350a6f1237ca2be3f763a8389332c792d9c29be72ce9
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple links to malicious redirectors, masquerading as game hack generators and cheats. The document body explicitly mentions 'Coin Master Hack Download 2021' and includes a call-to-action phrase, indicating a lure for users seeking unauthorized game advantages. The presence of numerous links to potentially malicious domains suggests an attempt to drive traffic to exploit or malware distribution 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/coin-master-hack-download-2021-game-hack In PDF document text
    • http://astdubai.co/userfiles/files/wurst-mc_GM479516143.pdfIn PDF document text
    • http://astdubai.co/userfiles/files/free-exploits-for-roblox_GM431946152.pdfIn PDF document text
    • http://astdubai.co/userfiles/files/roblox-arsenal-hack-script-pastebin_GM431946152.pdfIn PDF document text
    • http://astdubai.co/userfiles/files/hack-download_GM431946152.pdfIn PDF document text
    • http://astdubai.co/userfiles/files/uprobuxcom-free-robux_GM431946152.pdfIn PDF document text
    • http://astdubai.co/userfiles/files/minecraft-on-computer-free_GM479516143.pdfIn PDF document text
    • http://astdubai.co/userfiles/files/coin-master-spin-hack-apk_GM406889139.pdfIn PDF document text
    • http://astdubai.co/userfiles/files/free-coins-coin-master-2021_GM406889139.pdfIn PDF document text
    • http://astdubai.co/userfiles/files/free-robux-instantly_GM431946152.pdfIn PDF document text
    • http://astdubai.co/userfiles/files/free-robux-no-human-verification-or-survey-or-download_GM431946152.pdfIn PDF document text
    • http://astdubai.co/userfiles/files/free-robux-roblox-promo-codes_GM431946152.pdfIn PDF document text
    • http://astdubai.co/userfiles/files/robuxmatchcon_GM431946152.pdfIn PDF document text
    • http://astdubai.co/userfiles/files/free-roblox-virtual-item-codes-for-shirts_GM431946152.pdfIn PDF document text
    • http://astdubai.co/userfiles/files/how-to-get-minecraft-bedrock-for-free_GM479516143.pdfIn PDF document text
    • http://astdubai.co/userfiles/files/free-links-coin-master_GM406889139.pdfIn PDF document text
    • http://astdubai.co/userfiles/files/oprewards-free-robux_GM431946152.pdfIn PDF document text
    • http://astdubai.co/userfiles/files/village-coin_GM406889139.pdfIn PDF document text
    • http://astdubai.co/userfiles/files/free-robux-generator-2021-ad_GM431946152.pdfIn PDF document text
    • http://astdubai.co/userfiles/files/roblox-free-play-unblocked_GM431946152.pdfIn PDF document text
    • http://astdubai.co/userfiles/files/fast-robux-online_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
font_00_sfnt_off00002f74.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2F74 22980 bytes
SHA-256: 3727bb8b0ea623dd66df3b555abe9a8d91c10f2bddca3bff5d7ad80c190f4d18
font_01_sfnt_off00006321.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6321 18988 bytes
SHA-256: 24c61ec5dda380d335f70cf248a1dbd8858f35ecf964e4cb835eae0821bc023c

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