Malicious PDF — malware analysis report

Static analysis result for SHA-256 c195655d6d264809…

MALICIOUS

PDF

34.6 KB Created: 2021-06-26 11:07:45 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-27
MD5: c164217b16a67d7626b2ef952ff06419 SHA-1: 41f9a5cdf7aad4ed9978fad168e65555455e0e3d SHA-256: c195655d6d2648091b87c36f15a88e7a88c8ed459361e679adeac9646a5d35ee
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple links to redirector infrastructure, specifically advertising 'free generator / game hack' lures for popular games. The primary malicious URL identified is http://netcdn.co/app/431946152/roblox-prison-life-fly-hack-game-hack, which is associated with known malicious redirectors. The document body and embedded URLs suggest a phishing or scam attempt to trick users into visiting malicious sites, likely for credential harvesting or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9984

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 http://netcdn.co/app/431946152/roblox-prison-life-fly-hack-game-hack In PDF document text
    • http://perpus.unbi.ac.id/slims7_cendana/repository/free-spins-for-coin-master_GM406889139.pdfIn PDF document text
    • http://perpus.unbi.ac.id/slims7_cendana/repository/free-roblox-girl-clothes_GM431946152.pdfIn PDF document text
    • http://perpus.unbi.ac.id/slims7_cendana/repository/comment-hacker-jelbracke-roblox_GM431946152.pdfIn PDF document text
    • http://perpus.unbi.ac.id/slims7_cendana/repository/conf-free-robux_GM431946152.pdfIn PDF document text
    • http://perpus.unbi.ac.id/slims7_cendana/repository/free-spin-link-for-coin-master-game_GM406889139.pdfIn PDF document text
    • http://perpus.unbi.ac.id/slims7_cendana/repository/unpatchable-free-robux-made-by-robuxian_GM431946152.pdfIn PDF document text
    • http://perpus.unbi.ac.id/slims7_cendana/repository/free-money-in-mad-city-in-roblox_GM431946152.pdfIn PDF document text
    • http://perpus.unbi.ac.id/slims7_cendana/repository/how-do-you-get-free-robux-without-doing-anything_GM431946152.pdfIn PDF document text
    • http://perpus.unbi.ac.id/slims7_cendana//repository/how-to-get-robux-for-free-2021_GM431946152.pdfIn PDF document text
    • http://perpus.unbi.ac.id/slims7_cendana/repository/roblox-hack-apk-android-2021_GM431946152.pdfIn PDF document text
    • http://perpus.unbi.ac.id/slims7_cendana//repository/coin-master-free-spins-link-2021-download_GM406889139.pdfIn PDF document text
    • http://perpus.unbi.ac.id/slims7_cendana/repository/how-to-exploit-roblox_GM431946152.pdfIn PDF document text
    • http://perpus.unbi.ac.id/slims7_cendana/repository/coin-master-spin-link-2021_GM406889139.pdfIn PDF document text
    • http://perpus.unbi.ac.id/slims7_cendana/repository/calling-roblox-to-get-free-robux_GM431946152.pdfIn PDF document text
    • http://perpus.unbi.ac.id/slims7_cendana/repository/cheats-codes-roblox-treasure-hunt-simulator_GM431946152.pdfIn PDF document text
    • http://perpus.unbi.ac.id/slims7_cendana/repository/minecraft-pe-hack-client_GM479516143.pdfIn PDF document text
    • http://perpus.unbi.ac.id/slims7_cendana/repository/coin-master-400-spin-link-hack_GM406889139.pdfIn PDF document text
    • http://perpus.unbi.ac.id/slims7_cendana/repository/how-to-play-a-game-that-cost-robux-free_GM431946152.pdfIn PDF document text
    • http://perpus.unbi.ac.id/slims7_cendana/repository/getrobux-info_GM431946152.pdfIn PDF document text
    • http://perpus.unbi.ac.id/slims7_cendana//repository/free-robux-with-no-verification_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
font_00_sfnt_off000030af.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x30AF 22120 bytes
SHA-256: ef23c955c0a5642d0accf609906e4c0bcfcd0ac3b8d85a7c29c512e9172b863b
font_01_sfnt_off000061a8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x61A8 19276 bytes
SHA-256: 59b4058f7b29373a11bba66da173b847410027c70cd97a56dff3a8389776e36b

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