Malicious PDF — malware analysis report

Static analysis result for SHA-256 29f28cc45a29dbfb…

MALICIOUS

PDF

35.2 KB Created: 2021-06-25 10:00:49 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-15
MD5: 3516b80c7a13e777c58268f5c5ab3f15 SHA-1: 24beabbdf16a8000838385f1d70f7917ccb4eefe SHA-256: 29f28cc45a29dbfbb8b09554910263e93d2f2a6b8e83dfb5f98c56c8176af3e0
100 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains a direct link to a malicious ZIP file, identified by the 'PDF_MALICIOUS_REDIRECTOR_LINK' heuristic. The document body and numerous extracted URLs reinforce the theme of game hacks and cheats, suggesting a lure to trick users into downloading malware. The ML classifier also strongly indicated maliciousness.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

Heuristics 3

  • 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/filtered_1.5.zip-roblox-hack-game-hack In PDF document text
    • http://achauco.vn/public/upload/files/roblox-bloxtube-hack_GM431946152.pdfIn PDF document text
    • http://achauco.vn/public/upload/files/free-spin-online-tool-coin-master_GM406889139.pdfIn PDF document text
    • http://achauco.vn/public/upload/files/best-free-roblox-executor_GM431946152.pdfIn PDF document text
    • http://achauco.vn/public/upload/files/robux-games_GM431946152.pdfIn PDF document text
    • http://achauco.vn/public/upload/files/free-flying-practice-place-roblox-a380_GM431946152.pdfIn PDF document text
    • http://achauco.vn/public/upload/files/free-spin-coin-master-game_GM406889139.pdfIn PDF document text
    • http://achauco.vn/public/upload/files/how-to-get-free-robux-no-download-2021_GM431946152.pdfIn PDF document text
    • http://achauco.vn/public/upload/files/coin-master-free-shield_GM406889139.pdfIn PDF document text
    • http://achauco.vn/public/upload/files/free-robux-no-human-verification-or-survey-or-download-2021_GM431946152.pdfIn PDF document text
    • http://achauco.vn/public/upload/files/coin-master-hack-without-verification-2021_GM406889139.pdfIn PDF document text
    • http://achauco.vn/public/upload/files/without-tiktok-free-fire_GM835599320.pdfIn PDF document text
    • http://achauco.vn/public/upload/files/how-to-hack-people-in-roblox_GM431946152.pdfIn PDF document text
    • http://achauco.vn/public/upload/files/roblox-prison-life-v20-infinite-ammo-hack-2021_GM431946152.pdfIn PDF document text
    • http://achauco.vn/public/upload/files/is-minecraft-free-on-ps4_GM479516143.pdfIn PDF document text
    • http://achauco.vn/public/upload/files/robux-for-kids_GM431946152.pdfIn PDF document text
    • http://achauco.vn/public/upload/files/coin-master-free-cards-link_GM406889139.pdfIn PDF document text
    • http://achauco.vn/public/upload/files/oprewards-robux_GM431946152.pdfIn PDF document text
    • http://achauco.vn/public/upload/files/free-pet-food-for-coin-master_GM406889139.pdfIn PDF document text
    • http://achauco.vn/public/upload/files/free-robux-clothes_GM431946152.pdfIn PDF document text
    • http://achauco.vn/public/upload/files/can-you-make-a-minecraft-server-for-free_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
font_00_sfnt_off00002f61.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2F61 22680 bytes
SHA-256: 231f80ff0ed428681a30ae9b1af7eea477ed5ca3608bd87eaf1fd17eadc93506
font_01_sfnt_off0000621f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x621F 19816 bytes
SHA-256: 633436621239186aa9721d2b9421b13c574132a357cb3d116b6dcc6630f127d2