Malicious PDF — malware analysis report

Static analysis result for SHA-256 36a1715eea994770…

MALICIOUS

PDF

42.5 KB Created: 2021-05-17 00:27:39 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-11
MD5: 4db835c232acb28f3b021b5e4f49ca91 SHA-1: 99f0349fbd8c31b4069c055c1f88efa3d47f7d29 SHA-256: 36a1715eea99477079e6d795f5e845df417be3c9bbb9190eb0f3a2171858032d
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document contains multiple links to known malicious redirectors, specifically advertising "free generators" or "game hacks" for popular games. The primary lure URL is https://netcdn.xyz/app/431946152/roblox-2021-hack-game-hack. While no scripts were explicitly extracted, the PDF structure and heuristic firings indicate it's designed to redirect users to potentially malicious websites, likely for credential harvesting or further malware delivery.

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/431946152/roblox-2021-hack-game-hack In PDF document text
    • http://olimpik.mk/imagescke/upload/files/how-to-get-free-robux-easy-on-phone_GM431946152.pdfIn PDF document text
    • http://olimpik.mk/imagescke/upload/files/how-to-get-free-robux-2021-no-human-verification_GM431946152.pdfIn PDF document text
    • http://olimpik.mk/imagescke/upload/files/how-to-change-your-roblox-username-for-free-2021_GM431946152.pdfIn PDF document text
    • http://olimpik.mk/imagescke/upload/files/blogspot-coin-master-free-spins_GM406889139.pdfIn PDF document text
    • http://olimpik.mk/imagescke/upload/files/coin-master-daily-gift-free-spins-and-coins-link_GM406889139.pdfIn PDF document text
    • http://olimpik.mk/imagescke/upload/files/free-spins-coin-master-without-survey_GM406889139.pdfIn PDF document text
    • http://olimpik.mk/imagescke/upload/files/get-robux-today_GM431946152.pdfIn PDF document text
    • http://olimpik.mk/imagescke/upload/files/coin-master-free-spins-link-today-ios_GM406889139.pdfIn PDF document text
    • http://olimpik.mk/imagescke/upload/files/hack-robux_GM431946152.pdfIn PDF document text
    • http://olimpik.mk/imagescke/upload/files/how-to-gift-robux-on-mobile_GM431946152.pdfIn PDF document text
    • http://olimpik.mk/imagescke/upload/files/how-to-hack-minecraft_GM479516143.pdfIn PDF document text
    • http://olimpik.mk/imagescke/upload/files/free-robux-2021-no-human-verification_GM431946152.pdfIn PDF document text
    • http://olimpik.mk/imagescke/upload/files/how-do-you-get-free-robux_GM431946152.pdfIn PDF document text
    • http://olimpik.mk/imagescke/upload/files/coin-master-hack-355_GM406889139.pdfIn PDF document text
    • http://olimpik.mk/imagescke/upload/files/minecraft-bedrock-client_GM479516143.pdfIn PDF document text
    • http://olimpik.mk/imagescke/upload/files/how-to-get-hacks-on-minecraft_GM479516143.pdfIn PDF document text
    • http://olimpik.mk/imagescke/upload/files/roblox-com-free-play_GM431946152.pdfIn PDF document text
    • http://olimpik.mk/imagescke/upload/files/minecraft-pe-texture-packs-free-download_GM479516143.pdfIn PDF document text
    • http://olimpik.mk/imagescke/upload/files/coin-master-tricks_GM406889139.pdfIn PDF document text
    • http://olimpik.mk/imagescke/upload/files/free-robux-no-verification-2021_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
stream_003_off00004a7c.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4A7C 24416 bytes
SHA-256: 3ad40cd14797354bdfd6716be0101b6779f5b2d1302cede0446bc36211a47739
font_01_sfnt_off000082b0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x82B0 18584 bytes
SHA-256: 0d052e0fccd73391d0e4376686c91c36ea26f223879c53cf61dff021e779cee2

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