Malicious PDF — malware analysis report

Static analysis result for SHA-256 a1f37f26551a513c…

MALICIOUS

PDF

43.1 KB Created: 2021-05-12 03:37:55 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-27
MD5: 98c089f059001dc9750f42a1c2713457 SHA-1: 5ef25d929c6f64754271328c7d48b26e130d1edd SHA-256: a1f37f26551a513c5276e4a5082364eda18a792dfff9dd48e375ab6d649b7eeb
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple links to known malicious redirectors and game hack lures, specifically targeting Minecraft and other popular games. The document body, though partially corrupted, contains references to 'free generator / game hack' and a URL associated with malicious redirector infrastructure. This indicates a social engineering attempt to drive traffic to potentially harmful sites.

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/479516143/minecraft-bedrock-server-hosting-free-game-hack In PDF document text
    • http://apx-centre.ru/images/coin-master-hack-no-human-verification_GM406889139.pdfIn PDF document text
    • http://apx-centre.ru/images/roblox-mobile-hack_GM431946152.pdfIn PDF document text
    • http://apx-centre.ru/images/coin-master-hack-2021_GM406889139.pdfIn PDF document text
    • http://apx-centre.ru/images/coin-master-unlimited-spin-hack-mod-apk_GM406889139.pdfIn PDF document text
    • http://apx-centre.ru/images/how-to-get-free-robux-for-real_GM431946152.pdfIn PDF document text
    • http://apx-centre.ru/images/minecraft-hack-app_GM479516143.pdfIn PDF document text
    • http://apx-centre.ru/images/free-robux-with-no-verification-2021_GM431946152.pdfIn PDF document text
    • http://apx-centre.ru/images/2021-free-spins-coin-master_GM406889139.pdfIn PDF document text
    • http://apx-centre.ru/images/free-spins-coin-master-site-wwwquoracom_GM406889139.pdfIn PDF document text
    • http://apx-centre.ru/images/coin-master-free-coin-hack_GM406889139.pdfIn PDF document text
    • http://apx-centre.ru/images/coin-master-free-spins-and-coins-daily-links_GM406889139.pdfIn PDF document text
    • http://apx-centre.ru/images/free-coin-master-hacks-no-verification-or-survey_GM406889139.pdfIn PDF document text
    • http://apx-centre.ru/images/minecraft-free-minecoins_GM479516143.pdfIn PDF document text
    • http://apx-centre.ru/images/free-coin-master-coins_GM406889139.pdfIn PDF document text
    • http://apx-centre.ru/images/coin-master-hack-apk-35-13_GM406889139.pdfIn PDF document text
    • http://apx-centre.ru/images/robux-hacks-2021_GM431946152.pdfIn PDF document text
    • http://apx-centre.ru/images/app-for-free-spins-on-coin-master_GM406889139.pdfIn PDF document text
    • http://apx-centre.ru/images/how-to-get-to-village-3-in-coin-master_GM406889139.pdfIn PDF document text
    • http://apx-centre.ru/images/coin-master-coins-free_GM406889139.pdfIn PDF document text
    • http://apx-centre.ru/images/free-spin-and-coin-blogspot_GM406889139.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_off00004bfc.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4BFC 25140 bytes
SHA-256: 844634702230374732ec964906c9a83b7ce93ed81e9a49576afd78011839c7ca
font_01_sfnt_off000084ff.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x84FF 18672 bytes
SHA-256: c45ccb7756ad31f0eb1659f3c43916dbd490baa96d6c6b1730beaec095da97be