Malicious PDF — malware analysis report

Static analysis result for SHA-256 d4fa27967b8f7583…

MALICIOUS

PDF

44.1 KB Created: 2021-05-19 03:39:52 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-14
MD5: 32c93dd1ae58aadf8dafed12b33d3e54 SHA-1: 075e8a40fb267881d578b48ac6b25c5d62fa5853 SHA-256: d4fa27967b8f75830f29e84baac176267fd1e3587626af1bd5c1120bd85948fd
160 Risk Score

Malware Insights

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

The PDF contains multiple links that redirect to malicious infrastructure, specifically designed to lure users into downloading potentially harmful content related to games. The presence of a visual download button and the ML classifier's high confidence score indicate a malicious intent to trick users into executing further payloads. No scripts were extracted, but the embedded links are the primary vector for exploitation.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9976

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.xyz/app/479516143/optifine-mcpe-game-hack In PDF document text
    • http://elearning.mtsnegeri9cirebon.sch.id/__statics/gudangsoal/files/roblox-hack-com_GM431946152.pdfIn PDF document text
    • http://elearning.mtsnegeri9cirebon.sch.id/__statics/gudangsoal/files/clients-minecraft_GM479516143.pdfIn PDF document text
    • http://elearning.mtsnegeri9cirebon.sch.id/__statics/gudangsoal/files/coin-master-free-blogspot_GM406889139.pdfIn PDF document text
    • http://elearning.mtsnegeri9cirebon.sch.id/__statics/gudangsoal/files/roblox-rape-hack_GM431946152.pdfIn PDF document text
    • http://elearning.mtsnegeri9cirebon.sch.id/__statics/gudangsoal/files/how-do-i-get-free-spins-in-coin-master_GM406889139.pdfIn PDF document text
    • http://elearning.mtsnegeri9cirebon.sch.id/__statics/gudangsoal/files/free-coin-master-spins-hack_GM406889139.pdfIn PDF document text
    • http://elearning.mtsnegeri9cirebon.sch.id/__statics/gudangsoal/files/coin-master-free-spins-and-coins-2021_GM406889139.pdfIn PDF document text
    • http://elearning.mtsnegeri9cirebon.sch.id/__statics/gudangsoal/files/how-to-get-free-spins-on-coin-master_GM406889139.pdfIn PDF document text
    • http://elearning.mtsnegeri9cirebon.sch.id/__statics/gudangsoal/files/coin-master-ios-hack-download_GM406889139.pdfIn PDF document text
    • http://elearning.mtsnegeri9cirebon.sch.id/__statics/gudangsoal/files/free-robux-apk_GM431946152.pdfIn PDF document text
    • http://elearning.mtsnegeri9cirebon.sch.id/__statics/gudangsoal/files/minecraft-hacked-client_GM479516143.pdfIn PDF document text
    • http://elearning.mtsnegeri9cirebon.sch.id/__statics/gudangsoal/files/coin-master-app-hack_GM406889139.pdfIn PDF document text
    • http://elearning.mtsnegeri9cirebon.sch.id/__statics/gudangsoal/files/www-claim-gg-to-earn-free-robux_GM431946152.pdfIn PDF document text
    • http://elearning.mtsnegeri9cirebon.sch.id/__statics/gudangsoal/files/how-to-get-free-admin-in-roblox_GM431946152.pdfIn PDF document text
    • http://elearning.mtsnegeri9cirebon.sch.id/__statics/gudangsoal/files/coin-master-free-spins_GM406889139.pdfIn PDF document text
    • http://elearning.mtsnegeri9cirebon.sch.id/__statics/gudangsoal/files/mobihack-roblox-hack_GM431946152.pdfIn PDF document text
    • http://elearning.mtsnegeri9cirebon.sch.id/__statics/gudangsoal/files/buy-robux-free_GM431946152.pdfIn PDF document text
    • http://elearning.mtsnegeri9cirebon.sch.id/__statics/gudangsoal/files/how-do-you-get-free-roblox_GM431946152.pdfIn PDF document text
    • http://elearning.mtsnegeri9cirebon.sch.id/__statics/gudangsoal/files/online-hacking-tricks-coin-master_GM406889139.pdfIn PDF document text
    • http://elearning.mtsnegeri9cirebon.sch.id/__statics/gudangsoal/files/free-robux-codes-2021_GM431946152.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_003_off00004d4a.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4D4A 28556 bytes
SHA-256: 51dc83a7723c6397a9e3a379d2a5a70a70bbc7d6e4a3524b5f6c566cedc9db67
font_01_sfnt_off00008cbb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8CBB 17516 bytes
SHA-256: 4dad5880ad3eacbbc69325eb8667ba1fdf9d8a9d84ebacaad4d0967bdcec7d7b

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