Malicious PDF — malware analysis report

Static analysis result for SHA-256 2ba045f2cadbfdb9…

MALICIOUS

PDF

41.7 KB Created: 2021-05-11 06:00:45 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-24
MD5: 56caa3440ff64567a4163b8a93364f2c SHA-1: 870ce7e982ebd77e37ac754302c92d785696720f SHA-256: 2ba045f2cadbfdb926b9f752159880224836374bad4148efbbea0d656f22f74c
160 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a game hack lure, linking to known malicious redirector infrastructure. The document body and embedded URLs reinforce this lure, directing users to 'hack-coin-master-for-free-game-hack'. The ML classifier also flagged this PDF as malicious with high confidence.

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/hack-coin-master-for-free-game-hack In PDF document text
    • https://topkoreamart.com/public/upload/files/roblox-toy-codes-free_GM431946152.pdfIn PDF document text
    • https://topkoreamart.com/public/upload/files/hack-coin-master-app_GM406889139.pdfIn PDF document text
    • https://topkoreamart.com/public/upload/files/coin-master-hack-app-for-ios_GM406889139.pdfIn PDF document text
    • https://topkoreamart.com/public/upload/files/coin-master-mod_GM406889139.pdfIn PDF document text
    • https://topkoreamart.com/public/upload/files/coin-master-free-spins-apk-2021_GM406889139.pdfIn PDF document text
    • https://topkoreamart.com/public/upload/files/how-to-get-hacks-on-minecraft_GM479516143.pdfIn PDF document text
    • https://topkoreamart.com/public/upload/files/minecraft-hacks-list_GM479516143.pdfIn PDF document text
    • https://topkoreamart.com/public/upload/files/coin-master-hack-tool-2021_GM406889139.pdfIn PDF document text
    • https://topkoreamart.com/public/upload/files/free-robux-ad_GM431946152.pdfIn PDF document text
    • https://topkoreamart.com/public/upload/files/free-robux-stream_GM431946152.pdfIn PDF document text
    • https://topkoreamart.com/public/upload/files/free-coin-master-spins-2021-link_GM406889139.pdfIn PDF document text
    • https://topkoreamart.com/public/upload/files/how-to-get-free-robux-for-free_GM431946152.pdfIn PDF document text
    • https://topkoreamart.com/public/upload/files/coin-master-free-coins-and-spins-link_GM406889139.pdfIn PDF document text
    • https://topkoreamart.com/public/upload/files/free-coin-master-gold-cards_GM406889139.pdfIn PDF document text
    • https://topkoreamart.com/public/upload/files/free-robux-hack_GM431946152.pdfIn PDF document text
    • https://topkoreamart.com/public/upload/files/how-do-you-get-free-robux-on-roblox_GM431946152.pdfIn PDF document text
    • https://topkoreamart.com/public/upload/files/ways-to-get-free-robux_GM431946152.pdfIn PDF document text
    • https://topkoreamart.com/public/upload/files/minecraft-bedrock-free-with-java_GM479516143.pdfIn PDF document text
    • https://topkoreamart.com/public/upload/files/roblox-hack-client_GM431946152.pdfIn PDF document text
    • https://topkoreamart.com/public/upload/files/how-to-hack-coin-master-using-es-filer_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_off000048a1.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x48A1 25160 bytes
SHA-256: ef04e6719dbba6bd8ed1b272816ccc7829d2301fbd1ce421fe479decfc04901e
font_01_sfnt_off000081fd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x81FD 17880 bytes
SHA-256: 257aee740a5ae17e91b93ad4d540c168849f24efe28ef42b55966c96749a0114

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