Malicious PDF — malware analysis report

Static analysis result for SHA-256 78750db2a4b2a9bd…

MALICIOUS

PDF

53.5 KB Created: 2021-06-11 11:41:28 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-16
MD5: 1ca5daf6074a1e24a47184a9280a8ea4 SHA-1: 09339dee90f53d11a5e675af72b1f4dce4cf08fc SHA-256: 78750db2a4b2a9bdff81a2402d695dabb2c9b58a2a9b89cb0c2b13fb0da24aa6
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple links to known malicious redirectors, disguised as "free generator / game hack" lures. The document body and embedded URLs suggest a social engineering tactic to trick users into clicking these links, likely leading to further malware downloads or phishing pages. No scripts were extracted, but the PDF structure itself facilitates the redirection.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9616

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.tw/app/431946152/best-roblox-shirt-maker-for-free-game-hack In PDF document text
    • http://perpustakaan.iahntp.ac.id/repository/minecraft-client_GM479516143.pdfIn PDF document text
    • http://perpustakaan.iahntp.ac.id/repository/how-do-you-get-free-roblox_GM431946152.pdfIn PDF document text
    • http://perpustakaan.iahntp.ac.id/repository/free-minecraft-bedrock-server-hosting_GM479516143.pdfIn PDF document text
    • http://perpustakaan.iahntp.ac.id/repository/get-free-robux-today_GM431946152.pdfIn PDF document text
    • http://perpustakaan.iahntp.ac.id/repository/roblox-avatar-tester_GM431946152.pdfIn PDF document text
    • https://perpustakaan.iahntp.ac.id/repository/minecraft-games-to-play-for-free_GM479516143.pdfIn PDF document text
    • http://perpustakaan.iahntp.ac.id/repository/rape-simulator_GM431946152.pdfIn PDF document text
    • http://perpustakaan.iahntp.ac.id/repository/coin-master-free-spins-2021_GM406889139.pdfIn PDF document text
    • https://perpustakaan.iahntp.ac.id/repository/can-i-get-minecraft-for-free_GM479516143.pdfIn PDF document text
    • http://perpustakaan.iahntp.ac.id/repository/free-robux-only-1-step_GM431946152.pdfIn PDF document text
    • http://perpustakaan.iahntp.ac.id/repository/free-robux-without-verification-or-survey_GM431946152.pdfIn PDF document text
    • http://perpustakaan.iahntp.ac.id/repository/coin-master-homepage_GM406889139.pdfIn PDF document text
    • http://perpustakaan.iahntp.ac.id/repository/roblox-login-hack_GM431946152.pdfIn PDF document text
    • http://perpustakaan.iahntp.ac.id/repository/coin-and-spin_GM406889139.pdfIn PDF document text
    • http://perpustakaan.iahntp.ac.id/repository/coin-master-hack-version-ios_GM406889139.pdfIn PDF document text
    • http://perpustakaan.iahntp.ac.id/repository/hack-for-killin-people-on-roblox_GM431946152.pdfIn PDF document text
    • https://perpustakaan.iahntp.ac.id/repository/adfly-hack-roblox_GM431946152.pdfIn PDF document text
    • http://perpustakaan.iahntp.ac.id/repository/tiktok-ui-kit-free_GM835599320.pdfIn PDF document text
    • http://perpustakaan.iahntp.ac.id/repository/how-to-get-free-robux-without-doing-anything-2021_GM431946152.pdfIn PDF document text
    • http://perpustakaan.iahntp.ac.id/repository/how-to-get-free-robux-without-any-verification_GM431946152.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_004_off000052e2.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x52E2 33556 bytes
SHA-256: d1a9801b99dbb10b19cf797e439faaaa31968751c5c260e5b1482b3749a05294
font_01_sfnt_off0000a066.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xA066 5596 bytes
SHA-256: 9a13c2580265a78e8a7257496a31ee0055738af7e20a5661c2902efe4bf05ce5
font_02_sfnt_off0000ad0e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xAD0E 18932 bytes
SHA-256: d3c702be3b0b2ce2c95e3d16db77c1780d26f522e23c524aa398f3b5a937b8a1

Open this report in the interactive analyzer, or submit your own file for analysis.