Malicious PDF — malware analysis report

Static analysis result for SHA-256 f46ba2c8388a7a23…

MALICIOUS

PDF

45.6 KB Created: 2021-06-03 08:50:07 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-27
MD5: 6e1bf328b4f5e8348179a671bee80522 SHA-1: 1855537c6567b4efa62ebea34bb809924ea9e518 SHA-256: f46ba2c8388a7a2375db1e9672e9dde671cfe875c6c636966a3ca6c151b4b538
160 Risk Score

Malware Insights

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

The PDF contains multiple heuristics indicating it is a malicious redirector lure, specifically referencing game hacks and free Robux. The embedded URL, https://netcdn.online/app/431946152/is-there-any-way-to-get-free-robux-game-hack, is identified as a known malicious redirector. The document body, though partially corrupted, contains text related to free Robux and a URL, reinforcing the lure. The ML classifier also flagged this PDF as malicious.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9864

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/431946152/is-there-any-way-to-get-free-robux-game-hack In PDF document text
    • https://digilib-ppkn.stkip-pgri-sumbar.ac.id//repository/free-minecraft-skin-packs_GM479516143.pdfIn PDF document text
    • https://digilib-ppkn.stkip-pgri-sumbar.ac.id//repository/how-to-get-100-free-spins-on-coin-master_GM406889139.pdfIn PDF document text
    • https://digilib-ppkn.stkip-pgri-sumbar.ac.id/repository/robloxmatchcom-free-robux_GM431946152.pdfIn PDF document text
    • https://digilib-ppkn.stkip-pgri-sumbar.ac.id//repository/wurst-hacked-client_GM479516143.pdfIn PDF document text
    • https://digilib-ppkn.stkip-pgri-sumbar.ac.id//repository/robux-money_GM431946152.pdfIn PDF document text
    • https://digilib-ppkn.stkip-pgri-sumbar.ac.id//repository/pokemon-go-free-pokecoins_GM1094591345.pdfIn PDF document text
    • https://digilib-ppkn.stkip-pgri-sumbar.ac.id//repository/free-printable-roblox-coloring-pages_GM431946152.pdfIn PDF document text
    • https://digilib-ppkn.stkip-pgri-sumbar.ac.id//repository/play-coin-master_GM406889139.pdfIn PDF document text
    • https://digilib-ppkn.stkip-pgri-sumbar.ac.id/repository/free-coins-and-spins-in-coin-master_GM406889139.pdfIn PDF document text
    • https://digilib-ppkn.stkip-pgri-sumbar.ac.id/repository/coin-master-hacks-2021_GM406889139.pdfIn PDF document text
    • https://digilib-ppkn.stkip-pgri-sumbar.ac.id/repository/coin-master-free-spins-link-today-2021_GM406889139.pdfIn PDF document text
    • https://digilib-ppkn.stkip-pgri-sumbar.ac.id//repository/free-spins-coin-master-app_GM406889139.pdfIn PDF document text
    • https://digilib-ppkn.stkip-pgri-sumbar.ac.id/repository/simplysarc_GM479516143.pdfIn PDF document text
    • https://digilib-ppkn.stkip-pgri-sumbar.ac.id/repository/free-minecraft-hosting-24-7_GM479516143.pdfIn PDF document text
    • https://digilib-ppkn.stkip-pgri-sumbar.ac.id//repository/coin-master-facebook_GM406889139.pdfIn PDF document text
    • https://digilib-ppkn.stkip-pgri-sumbar.ac.id//repository/minecraft-gun-mod-download-free_GM479516143.pdfIn PDF document text
    • https://digilib-ppkn.stkip-pgri-sumbar.ac.id//repository/minecraft-packs-free_GM479516143.pdfIn PDF document text
    • https://digilib-ppkn.stkip-pgri-sumbar.ac.id//repository/free-coins-and-spins-coin-master-2021_GM406889139.pdfIn PDF document text
    • https://digilib-ppkn.stkip-pgri-sumbar.ac.id/repository/how-to-hack-someones-account-on-roblox_GM431946152.pdfIn PDF document text
    • https://digilib-ppkn.stkip-pgri-sumbar.ac.id/repository/minecraft-java-hacks_GM479516143.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_004_off000053ea.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x53EA 25204 bytes
SHA-256: b33d55b02601448f7e480f6c417132b83ffa9c8b9c520c9c5dc67fc4f62ffc9d
font_01_sfnt_off00008dbf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8DBF 18892 bytes
SHA-256: d4b621edf5ac5f073c5a65dd804db4f1f2ad13c123c1b5ace541ce5f5c284f58

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