Malicious PDF — malware analysis report

Static analysis result for SHA-256 925d4651e8924a18…

MALICIOUS

PDF

43.8 KB Created: 2021-05-11 03:12:42 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-11-21
MD5: bf3ebaba8243daf07c96c6f4b08e09f2 SHA-1: dc7677f3c85118ae35b75c5bda5dcbc65d2eb986 SHA-256: 925d4651e8924a18c3a793364c82bc75f862fc514fc6270f09ed262204978851
100 Risk Score

Malware Insights

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

The PDF document contains embedded links that redirect to malicious infrastructure, as indicated by the PDF_MALICIOUS_REDIRECTOR_LINK heuristic. The document body and embedded URLs suggest a lure for downloading game-related "hacks" or "free items," which is a common tactic for distributing malware. The ML classifier also strongly flagged this PDF as malicious.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9969

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 https://netcdn.xyz/app/479516143/minecraft-pe-0.17-0-apk-free-download-android-game-hack In PDF document text
    • http://perpus.polimarim.online/repository/cool-free-minecraft-skins_GM479516143.pdfIn PDF document text
    • http://perpus.polimarim.online/repository/www-coin-master-hack_GM406889139.pdfIn PDF document text
    • http://perpus.polimarim.online/repository/coin-master-spins-for-free_GM406889139.pdfIn PDF document text
    • http://perpus.polimarim.online/repository/haktuts-coin-master-today_GM406889139.pdfIn PDF document text
    • http://perpus.polimarim.online/repository/is-there-an-actual-hack-that-work-for-coin-master_GM406889139.pdfIn PDF document text
    • http://perpus.polimarim.online/repository/robux-hack-2021_GM431946152.pdfIn PDF document text
    • http://perpus.polimarim.online/repository/free-robux-with-no-human-verification_GM431946152.pdfIn PDF document text
    • http://perpus.polimarim.online/repository/free-spins-for-coin-master-2021_GM406889139.pdfIn PDF document text
    • http://perpus.polimarim.online/repository/coin-master-free-spins-hack_GM406889139.pdfIn PDF document text
    • http://perpus.polimarim.online/repository/free-spins-and-coins-coin-master-facebook_GM406889139.pdfIn PDF document text
    • http://perpus.polimarim.online/repository/roblox-robux-generator-2021_GM431946152.pdfIn PDF document text
    • http://perpus.polimarim.online/repository/earn-robux_GM431946152.pdfIn PDF document text
    • http://perpus.polimarim.online/repository/minecraft-tools_GM479516143.pdfIn PDF document text
    • http://perpus.polimarim.online/repository/minecraft-bedrock-free-with-java_GM479516143.pdfIn PDF document text
    • http://perpus.polimarim.online/repository/coin-master-unlimited-spin-link_GM406889139.pdfIn PDF document text
    • http://perpus.polimarim.online/repository/free-account-roblox-with-robux_GM431946152.pdfIn PDF document text
    • http://perpus.polimarim.online/repository/minecraft-bedrock-free-download_GM479516143.pdfIn PDF document text
    • http://perpus.polimarim.online/repository/blox-fun-info_GM431946152.pdfIn PDF document text
    • http://perpus.polimarim.online/repository/coin-master-free-spins-app_GM406889139.pdfIn PDF document text
    • http://perpus.polimarim.online/repository/how-to-hack-someones-roblox-account-2021_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
stream_003_off00004d11.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4D11 25656 bytes
SHA-256: dede07c56be068fd611c6a19e2d2c679c467ffac8047520fa27c05ff28c0448e
font_01_sfnt_off00008639.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8639 19188 bytes
SHA-256: 89862b23db33f89fc4e06f26f29a139fa923ad6cd018f80821c34a6209bfa909