Malicious PDF — malware analysis report

Static analysis result for SHA-256 b0d5d2a1427fe0b5…

MALICIOUS

PDF

50.4 KB Created: 2021-06-09 07:30:49 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-13
MD5: b9174f754f71f050248d23c7c0804463 SHA-1: 69fc865d3106fad2e4c93ae512810dbdafc249ec SHA-256: b0d5d2a1427fe0b551f54ae50c375556cfa4b46fc36312991382cf7e736089df
160 Risk Score

Malware Insights

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

The PDF document contains multiple links designed to lure users into clicking on them by promising free in-game items or hacks. These links redirect to malicious infrastructure, specifically identified as a redirector. The document body and embedded URLs indicate a scam related to popular online games, aiming to exploit user interest for malicious purposes. No scripts were extracted, but the presence of redirector links and the lure content strongly suggest a phishing or scam attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9769

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.tw/app/431946152/free-clothing-in-roblox-2021-game-hack In PDF document text
    • http://library.umla.ac.id/repository/games-for-robux_GM431946152.pdfIn PDF document text
    • http://library.umla.ac.id/repository/real-coin-master-hack-2021_GM406889139.pdfIn PDF document text
    • http://library.umla.ac.id/repository/coin-master-2021-free-spins-link-today_GM406889139.pdfIn PDF document text
    • http://library.umla.ac.id/repository/free-minecraft-java-code_GM479516143.pdfIn PDF document text
    • http://library.umla.ac.id/repository/how-to-get-2021-robux-for-free_GM431946152.pdfIn PDF document text
    • http://library.umla.ac.id/repository/free-robux-with-no-verification_GM431946152.pdfIn PDF document text
    • http://library.umla.ac.id/repository/minecraft-bedrock-client_GM479516143.pdfIn PDF document text
    • http://library.umla.ac.id/repository/easy-robux-generator_GM431946152.pdfIn PDF document text
    • http://library.umla.ac.id/repository/minecraft-games-free-download_GM479516143.pdfIn PDF document text
    • http://library.umla.ac.id/repository/free-coin-master-cheats_GM406889139.pdfIn PDF document text
    • http://library.umla.ac.id//repository/get-free-robux_GM431946152.pdfIn PDF document text
    • http://library.umla.ac.id/repository/how-to-get-anything-for-free-on-roblox-2021_GM431946152.pdfIn PDF document text
    • http://library.umla.ac.id//repository/oprewards-free-robux_GM431946152.pdfIn PDF document text
    • http://library.umla.ac.id//repository/spin-coin-master-free_GM406889139.pdfIn PDF document text
    • http://library.umla.ac.id/repository/minecraft-java-edition-free-code_GM479516143.pdfIn PDF document text
    • http://library.umla.ac.id//repository/free-robux-codes-no-verification_GM431946152.pdfIn PDF document text
    • http://library.umla.ac.id/repository/minecraft-free-ios-2021_GM479516143.pdfIn PDF document text
    • http://library.umla.ac.id/repository/coin-master-daily-free-spins-link-march-2021_GM406889139.pdfIn PDF document text
    • http://library.umla.ac.id/repository/roblox-hack-download-pc_GM431946152.pdfIn PDF document text
    • http://library.umla.ac.id/repository/no-verification-coin-master-hack_GM406889139.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_004_off00005339.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x5339 27608 bytes
SHA-256: 9ba5c0adcd92ff0e4b026d38fafbd81b4e1748cf54d3a90f78c6f865416e1619
font_01_sfnt_off00009366.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9366 3884 bytes
SHA-256: 40b61f8938bd710dc29dc58ba3fde91c245a6a69596ec569b4d27c769ca417cf
font_02_sfnt_off0000a00e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xA00E 19028 bytes
SHA-256: a6b048bfdf8bdd44f08deaa0b9ffe4a8337700b64e5e2ae010090335293af483

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