Malicious PDF — malware analysis report

Static analysis result for SHA-256 269b2fb099562b35…

MALICIOUS

PDF

47.9 KB Created: 2021-06-03 06:07:03 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-27
MD5: 182d0c5ac30fd519d1cac7ec3e21d0cb SHA-1: 9113e6f02bcc7bb9ab3ddd67be0dc9b8fd45fc36 SHA-256: 269b2fb099562b35841f97b0a94a77f029bab651b2cc6e2854a517107a462eea
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple links to known malicious redirectors, specifically advertising "free generators" and "game hacks". The primary malicious URL identified is https://netcdn.online/app/479516143/toolbox-apk-game-hack. While no scripts were explicitly extracted, the PDF structure and heuristic firings strongly indicate a lure for users to click these links, likely leading to further malware or phishing content. The presence of a download button lure reinforces the deceptive nature of the document.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9796

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.online/app/479516143/toolbox-apk-game-hack In PDF document text
    • http://opac.akafarma-aceh.ac.id/repository/robux-prices_GM431946152.pdfIn PDF document text
    • http://opac.akafarma-aceh.ac.id/repository/how-to-use-scripts-in-roblox-hack_GM431946152.pdfIn PDF document text
    • http://opac.akafarma-aceh.ac.id/repository/best-free-minecraft-server-hosting-reddit_GM479516143.pdfIn PDF document text
    • http://opac.akafarma-aceh.ac.id/repository/rewardex-robux_GM431946152.pdfIn PDF document text
    • http://opac.akafarma-aceh.ac.id/repository/free-spin-link-for-coin-master-game_GM406889139.pdfIn PDF document text
    • http://opac.akafarma-aceh.ac.id/repository/ways-to-get-free-robux-2021_GM431946152.pdfIn PDF document text
    • http://opac.akafarma-aceh.ac.id/repository/clients-minecraft_GM479516143.pdfIn PDF document text
    • http://opac.akafarma-aceh.ac.id/repository/coin-master-hack-apk-iphone_GM406889139.pdfIn PDF document text
    • http://opac.akafarma-aceh.ac.id/repository/robux-redeem_GM431946152.pdfIn PDF document text
    • http://opac.akafarma-aceh.ac.id/repository/free-spin-coin-master-instagram_GM406889139.pdfIn PDF document text
    • http://opac.akafarma-aceh.ac.id/repository/free-coin-and-spin-in-coin-master_GM406889139.pdfIn PDF document text
    • http://opac.akafarma-aceh.ac.id/repository/dominus-roblox-free_GM431946152.pdfIn PDF document text
    • http://opac.akafarma-aceh.ac.id/repository/free-avatar-roblox_GM431946152.pdfIn PDF document text
    • http://opac.akafarma-aceh.ac.id/repository/free-spins-and-coins-for-coin-master-game_GM406889139.pdfIn PDF document text
    • http://opac.akafarma-aceh.ac.id/repository/free-roebucks_GM431946152.pdfIn PDF document text
    • http://opac.akafarma-aceh.ac.id/repository/coin-master-free-coins-and-spins-daily_GM406889139.pdfIn PDF document text
    • http://opac.akafarma-aceh.ac.id/repository/best-free-minecraft-hacked-client_GM479516143.pdfIn PDF document text
    • http://opac.akafarma-aceh.ac.id/repository/free-robux-earn_GM431946152.pdfIn PDF document text
    • http://opac.akafarma-aceh.ac.id/repository/tiktok-free-followers-mod-apk_GM835599320.pdfIn PDF document text
    • http://opac.akafarma-aceh.ac.id/repository/how-do-you-earn-robux-on-roblox_GM431946152.pdfIn PDF document text
    • https://youtuIn 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_off000053d9.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x53D9 25620 bytes
SHA-256: f2a291d2a0498aa321a27d8fd4837a1bd5697f29a9a58bee5bcf2e5ce961b0aa
font_01_sfnt_off00008e4e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8E4E 3168 bytes
SHA-256: 7fef945f862182895d7307b65153101e18e63b3b072d2c4a5557daad30ea4385
font_02_sfnt_off0000994a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x994A 18048 bytes
SHA-256: 646fad9d756b15d24d99e1fc175dfd3628bdaadc493ae9366c014baed99d5fea

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