Malicious PDF — malware analysis report

Static analysis result for SHA-256 f15d096205497a3c…

MALICIOUS

PDF

46.5 KB Created: 2021-05-19 03:07:10 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-11
MD5: e2600065d1d1674ea5da841eb8cae6bf SHA-1: 2a878eaa08b16c0331b39589be92e13b932056eb SHA-256: f15d096205497a3c03c25715015c9382fb2986f1c49d8e027c72ebbae43c400f
220 Risk Score

Malware Insights

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

The PDF contains multiple heuristics indicating malicious redirector links and a lure for game hacks, specifically requesting user secrets. The document body and embedded URLs point to a phishing attempt disguised as a game hack generator, likely leading to credential theft or malware download. While no scripts were explicitly extracted, the PDF structure and embedded links suggest a client-side execution vector.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8948

Heuristics 5

  • 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.
  • Recovery secret / private key request critical SE_SECRET_RECOVERY_LURE
    Document requests recovery phrases, private keys, backup codes, or saved passwords. Requests for these secrets in a document are high-risk.
  • 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/431946152/free-robux-only-1-step-game-hack In PDF document text
    • https://elearning.mtsn9jombang.sch.id/__statics/gudangsoal/files/roblox-jailbreak-hack_GM431946152.pdfIn PDF document text
    • http://elearning.mtsn9jombang.sch.id/__statics/gudangsoal/files/how-to-get-free-robux-without-doing-anything-2021_GM431946152.pdfIn PDF document text
    • http://elearning.mtsn9jombang.sch.id/__statics/gudangsoal/files/rbxfree-com-free-robux_GM431946152.pdfIn PDF document text
    • https://elearning.mtsn9jombang.sch.id/__statics/gudangsoal/files/coin-master-free-2021-spin-link-today_GM406889139.pdfIn PDF document text
    • http://elearning.mtsn9jombang.sch.id/__statics/gudangsoal/files/coin-master-free-spins-link-download-hack_GM406889139.pdfIn PDF document text
    • https://elearning.mtsn9jombang.sch.id/__statics/gudangsoal/files/coin-master-hacks-that-work_GM406889139.pdfIn PDF document text
    • https://elearning.mtsn9jombang.sch.id/__statics/gudangsoal/files/robux-matchcomfree-robux_GM431946152.pdfIn PDF document text
    • http://elearning.mtsn9jombang.sch.id/__statics/gudangsoal/files/minecraft-hacks-for-2b2t_GM479516143.pdfIn PDF document text
    • http://elearning.mtsn9jombang.sch.id/__statics/gudangsoal/files/free-spin-coin-master-2021-link_GM406889139.pdfIn PDF document text
    • https://elearning.mtsn9jombang.sch.id/__statics/gudangsoal/files/free-robux-place_GM431946152.pdfIn PDF document text
    • http://elearning.mtsn9jombang.sch.id/__statics/gudangsoal/files/blox-pink-robux-free_GM431946152.pdfIn PDF document text
    • http://elearning.mtsn9jombang.sch.id/__statics/gudangsoal/files/claim-roblox_GM431946152.pdfIn PDF document text
    • https://elearning.mtsn9jombang.sch.id/__statics/gudangsoal/files/coin-master-free-spins-16-04-19_GM406889139.pdfIn PDF document text
    • https://elearning.mtsn9jombang.sch.id/__statics/gudangsoal/files/roblox-free-executor_GM431946152.pdfIn PDF document text
    • https://elearning.mtsn9jombang.sch.id/__statics/gudangsoal/files/free-spin-coin-master-2021_GM406889139.pdfIn PDF document text
    • http://elearning.mtsn9jombang.sch.id/__statics/gudangsoal/files/roblox-comroblox_GM431946152.pdfIn PDF document text
    • http://elearning.mtsn9jombang.sch.id/__statics/gudangsoal/files/how-to-get-free-coins-and-free-spins-coin-master_GM406889139.pdfIn PDF document text
    • https://elearning.mtsn9jombang.sch.id/__statics/gudangsoal/files/minecraft-server-free-trial_GM479516143.pdfIn PDF document text
    • http://elearning.mtsn9jombang.sch.id/__statics/gudangsoal/files/free-robux-survey_GM431946152.pdfIn PDF document text
    • http://elearning.mtsn9jombang.sch.id/__statics/gudangsoal/files/how-to-get-minecraft-for-free-on-phone_GM479516143.pdfIn 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_003_off000049ef.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x49EF 26788 bytes
SHA-256: 721afadb965bbae1849aa955cb5e616b2b8496b9c7b2292da74df68205e9a6d8
font_01_sfnt_off0000882a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x882A 2864 bytes
SHA-256: fc50d3b60b7bea05908810d985fa0ebf2c795d0dc08be6e94fc6be5e11198773
font_02_sfnt_off0000920e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x920E 18656 bytes
SHA-256: 070bf31dcf9002553526675ed1cd7b39f0747279791c235f0424fbc506b236c5

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