Malicious PDF — malware analysis report

Static analysis result for SHA-256 49931367b4933bf6…

MALICIOUS

PDF

41.6 KB Created: 2021-05-11 09:16:18 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-13
MD5: 7052d3f9b4538cdd32dd83cdb7a66dcb SHA-1: 1458daadb86e215fab318921a55d1ae7eebe4a6a SHA-256: 49931367b4933bf642b4190458da1bfe6244c89cdb48a53d6b615ef1c1babc3d
200 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF document contains multiple links that redirect to malicious infrastructure, masquerading as game hacks or generators. The presence of a fake CAPTCHA heuristic indicates a social engineering attempt to trick the user into interacting with these links. The ML classifier strongly flagged this PDF as malicious, supporting the conclusion that it is designed for user deception and redirection to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9971

Heuristics 5

  • 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.
  • Fake CAPTCHA / human verification prompt high SE_FAKE_CAPTCHA
    Document displays a fake CAPTCHA or human-verification prompt — used to trick users into running commands or pressing keyboard shortcuts
  • 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/431946152/mathep-game-hack In PDF document text
    • http://familymn.com/images/how-to-hack-minecraft-pe_GM479516143.pdfIn PDF document text
    • http://familymn.com/images/how-to-get-free-robux-2021-easy_GM431946152.pdfIn PDF document text
    • http://familymn.com/images/how-to-buy-robux-for-free_GM431946152.pdfIn PDF document text
    • http://familymn.com/images/fan-page-coin-master_GM406889139.pdfIn PDF document text
    • http://familymn.com/images/coin-master-free-spins-promo-code_GM406889139.pdfIn PDF document text
    • http://familymn.com/images/coin-master-hack-no-verify_GM406889139.pdfIn PDF document text
    • http://familymn.com/images/roblox-generator_GM431946152.pdfIn PDF document text
    • http://familymn.com/images/how-many-free-spin-links-is-there-for-coin-master_GM406889139.pdfIn PDF document text
    • http://familymn.com/images/robux-free-co_GM431946152.pdfIn PDF document text
    • http://familymn.com/images/coin-master-daily-gifts_GM406889139.pdfIn PDF document text
    • http://familymn.com/images/coin-master-link-daily-get-free-spins-amp_GM406889139.pdfIn PDF document text
    • http://familymn.com/images/free-spins-for-coin-master_GM406889139.pdfIn PDF document text
    • http://familymn.com/images/real-roblox_GM431946152.pdfIn PDF document text
    • http://familymn.com/images/mcmaster-club-coin-master-hack_GM406889139.pdfIn PDF document text
    • http://familymn.com/images/coin-master-freebies_GM406889139.pdfIn PDF document text
    • http://familymn.com/images/how-to-get-minecraft-for-free-on-laptop_GM479516143.pdfIn PDF document text
    • http://familymn.com/images/minecraft-bedrock-edition-free_GM479516143.pdfIn PDF document text
    • http://familymn.com/images/roblox-cheat_GM431946152.pdfIn PDF document text
    • http://familymn.com/images/new-free-money-links-coin-master_GM406889139.pdfIn PDF document text
    • http://familymn.com/images/free-roblox-clothes_GM431946152.pdfIn PDF document text
    • https://Buy.HoaxMC.comIn 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_off00004598.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4598 26148 bytes
SHA-256: 1f24c77a52cc41c58e14ceab619a86504e7403299fb6066852476237a3b9bd79
font_01_sfnt_off000080f4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x80F4 18068 bytes
SHA-256: 2b3a9c081553d581a827df65dee23cc3b514f38b63125b20306762026e644864

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