Malicious PDF — malware analysis report

Static analysis result for SHA-256 c69749f9d35f5d45…

MALICIOUS

PDF

45.2 KB Created: 2021-05-10 17:45:11 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-27
MD5: 277525a15c7b418b3286e24a2e781d58 SHA-1: 36f2de83b7637dfdbb07af49c7a362099660dc89 SHA-256: c69749f9d35f5d4561298eff9edf8cba8007a182b6f4da5ea68e7f4bb7f42259
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple heuristics indicating it is a malicious redirector link, specifically luring users with 'free generator / game hack' content. The embedded URL, https://netcdn.xyz/app/479516143/minecraft-bedrock-edition-hacks-game-hack, is flagged as malicious infrastructure. While no scripts were explicitly extracted, the PDF structure and heuristics strongly suggest a social engineering attack to drive users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9551

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/minecraft-bedrock-edition-hacks-game-hack In PDF document text
    • https://elibrary.stp-aviasi.ac.id/repository/how-to-robux_GM431946152.pdfIn PDF document text
    • https://elibrary.stp-aviasi.ac.id/repository/minecraft-account-hacked_GM479516143.pdfIn PDF document text
    • https://elibrary.stp-aviasi.ac.id/repository/free-attacks-on-coin-master_GM406889139.pdfIn PDF document text
    • https://elibrary.stp-aviasi.ac.id/repository/cool-free-roblox-outfits_GM431946152.pdfIn PDF document text
    • https://elibrary.stp-aviasi.ac.id/repository/coin-master-mod-free-download_GM406889139.pdfIn PDF document text
    • https://elibrary.stp-aviasi.ac.id/repository/coin-master-free-account_GM406889139.pdfIn PDF document text
    • https://elibrary.stp-aviasi.ac.id/repository/coin-master-unlimited-spins_GM406889139.pdfIn PDF document text
    • https://elibrary.stp-aviasi.ac.id/repository/free-robux-hack-us_GM431946152.pdfIn PDF document text
    • https://elibrary.stp-aviasi.ac.id/repository/free-spin-links-coin-master-2021_GM406889139.pdfIn PDF document text
    • https://elibrary.stp-aviasi.ac.id/repository/coin-master-free-cards-link_GM406889139.pdfIn PDF document text
    • https://elibrary.stp-aviasi.ac.id/repository/free-robux-hack-no-human-verification-or-survey_GM431946152.pdfIn PDF document text
    • https://elibrary.stp-aviasi.ac.id/repository/roblox-free-body_GM431946152.pdfIn PDF document text
    • https://elibrary.stp-aviasi.ac.id/repository/free-spins-coin-master-2021-today_GM406889139.pdfIn PDF document text
    • https://elibrary.stp-aviasi.ac.id/repository/free-robux-with-no-survey_GM431946152.pdfIn PDF document text
    • https://elibrary.stp-aviasi.ac.id/repository/free-robux-no-verification-no-survey_GM431946152.pdfIn PDF document text
    • https://elibrary.stp-aviasi.ac.id/repository/minecraft-windows-10-key-free_GM479516143.pdfIn PDF document text
    • https://elibrary.stp-aviasi.ac.id/repository/free-minecraft-texture-packs-java_GM479516143.pdfIn PDF document text
    • https://elibrary.stp-aviasi.ac.id/repository/free-pet-snacks-coin-master_GM406889139.pdfIn PDF document text
    • https://elibrary.stp-aviasi.ac.id/repository/get-free-spins-on-coin-master-links_GM406889139.pdfIn PDF document text
    • https://elibrary.stp-aviasi.ac.id/repository/robux-hack-generator_GM431946152.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_off00004a8f.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4A8F 24904 bytes
SHA-256: 0d0226f554d29491593bd3d7943418ef7618da18b18597ccc8ae38ea8fd5a282
font_01_sfnt_off000083df.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x83DF 3056 bytes
SHA-256: dd24a0ab94df4552e459bd06fd01b0fd3f021c1d51d1d64407070e735974a028
font_02_sfnt_off00008e51.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8E51 18268 bytes
SHA-256: ab11a404ecd1e05d7423e813f114c97ddc1b622607c5cfcfecdb5803810a7c8b

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