Malicious PDF — malware analysis report

Static analysis result for SHA-256 ef809df2a2ba79be…

MALICIOUS

PDF

52.5 KB Created: 2021-05-13 02:41:43 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-16
MD5: 2f45a39de3e32e47a1bad0688c5be75f SHA-1: ca3ab670d56d698483e6706f1eb0b44dbfb3a3a2 SHA-256: ef809df2a2ba79beec8dc6b189e73c1d80954239f5e176f512508349bc0effc5
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple links to known malicious redirectors and infrastructure, disguised as game hack generators. The ML classifier also flagged this PDF as malicious. The embedded URLs likely lead to further malicious content or phishing pages, aiming to exploit user interest in free game items. No scripts were extracted, but the presence of multiple malicious links indicates a phishing or scam attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8646

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/479516143/minecraft-servers-that-allow-hacks-game-hack In PDF document text
    • https://www.manmed.info:443/images/free-robux-hacker-us_GM431946152.pdfIn PDF document text
    • https://www.manmed.info:443/images/minecraft-hack-download_GM479516143.pdfIn PDF document text
    • https://www.manmed.info:443/images/how-do-you-get-free-robux-on-roblox_GM431946152.pdfIn PDF document text
    • https://www.manmed.info:443/images/free-minecraft-com_GM479516143.pdfIn PDF document text
    • https://www.manmed.info:443/images/how-to-get-free-coins-on-coin-master_GM406889139.pdfIn PDF document text
    • https://www.manmed.info:443/images/free-robux-generator-2021_GM431946152.pdfIn PDF document text
    • https://www.manmed.info:443/images/coin-master-free-spin-and-coins-links-home_GM406889139.pdfIn PDF document text
    • https://www.manmed.info:443/images/free-roblox-clothes-boy_GM431946152.pdfIn PDF document text
    • https://www.manmed.info:443/images/kuso-icu-roblox-hack_GM431946152.pdfIn PDF document text
    • https://www.manmed.info:443/images/how-to-get-free-spins-on-coin-master_GM406889139.pdfIn PDF document text
    • https://www.manmed.info:443/images/free-robux-that-actually-works-2021_GM431946152.pdfIn PDF document text
    • https://www.manmed.info:443/images/free-spin-coin-master-game_GM406889139.pdfIn PDF document text
    • https://www.manmed.info:443/images/coin-master-free-coins-facebook_GM406889139.pdfIn PDF document text
    • https://www.manmed.info:443/images/coin-master-spins-hack-iphone_GM406889139.pdfIn PDF document text
    • https://www.manmed.info:443/images/free-robux-picture_GM431946152.pdfIn PDF document text
    • https://www.manmed.info:443/images/coin-master-spin-link-today_GM406889139.pdfIn PDF document text
    • https://www.manmed.info:443/images/free-robux-no-human-verification-no-survey_GM431946152.pdfIn PDF document text
    • https://www.manmed.info:443/images/free-spins-in-coin-master-without-human-verification_GM406889139.pdfIn PDF document text
    • https://www.manmed.info:443/images/get-free-spins-in-coin-master_GM406889139.pdfIn PDF document text
    • https://www.manmed.info:443/images/free-robux-on-iphone_GM431946152.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00004c06.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x4C06 24768 bytes
SHA-256: 0b11991526d85d01c89760d05771a084a738185db967902a3bb4c63a25810ccc
font_01_sfnt_off00008320.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8320 7936 bytes
SHA-256: 218d53b68bdddb064f6fba4be822d5b3725ed1cef1a3b42796a8dd99c4a62f4e
font_02_sfnt_off00009c4a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9C4A 4232 bytes
SHA-256: ab6320ab342704d2c5943abfba82ed4837bf2da871c91621741fd4cfd15c6ed5
font_03_sfnt_off0000aad7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xAAD7 18396 bytes
SHA-256: 9f0f6966d160eb4a8d7c12083ffcfddab2fd99c1ceedc8c822370871be153b2a

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