Malicious PDF — malware analysis report

Static analysis result for SHA-256 d14e2b56d551ea0c…

MALICIOUS

PDF

43.6 KB Created: 2021-05-12 01:01:28 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-24
MD5: 1389f4a80229fadf93ac1a9edb7554cf SHA-1: 87ac2513921030bb2901f2a88656f0c595a12388 SHA-256: d14e2b56d551ea0cefad27c18d20a59e26618f10f2ca419e5d6da5be0db076c9
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple links designed to lure users into clicking on what appears to be a game hack or free currency generator. The primary link redirects to malicious infrastructure, indicating a phishing or scam attempt. While no scripts were explicitly extracted, the PDF structure and embedded links strongly suggest a malicious redirector workflow, likely intended to deliver a secondary payload or lead the user to a credential harvesting page.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9969

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/431946152/how-to-get-free-robux-without-downloading-anything-game-hack In PDF document text
    • http://perpus.wdh.ac.id//repository/link-for-free-coins-in-coin-master_GM406889139.pdfIn PDF document text
    • http://perpus.wdh.ac.id//repository/free-coin-master-links_GM406889139.pdfIn PDF document text
    • http://perpus.wdh.ac.id//repository/roblox-arsenal-hacks-download_GM431946152.pdfIn PDF document text
    • http://perpus.wdh.ac.id/repository/free-coin-master-cheats_GM406889139.pdfIn PDF document text
    • http://perpus.wdh.ac.id/repository/free-robux-only-username-no-human-verification_GM431946152.pdfIn PDF document text
    • http://perpus.wdh.ac.id/repository/static-moonactive-net-rewards-2021_GM406889139.pdfIn PDF document text
    • http://perpus.wdh.ac.id/repository/best-free-spins-for-coin-master_GM406889139.pdfIn PDF document text
    • http://perpus.wdh.ac.id/repository/roblox-land-free-robux_GM431946152.pdfIn PDF document text
    • http://perpus.wdh.ac.id/repository/how-to-get-free-robux-easy-on-phone_GM431946152.pdfIn PDF document text
    • http://perpus.wdh.ac.id/repository/how-to-get-free-robux-without-any-verification_GM431946152.pdfIn PDF document text
    • http://perpus.wdh.ac.id/repository/coin-master-unlimited-spin-hack-mod-apk_GM406889139.pdfIn PDF document text
    • http://perpus.wdh.ac.id/repository/coin-master-free-spins-and-coins-group_GM406889139.pdfIn PDF document text
    • http://perpus.wdh.ac.id/repository/coin-master-free-link-spin_GM406889139.pdfIn PDF document text
    • http://perpus.wdh.ac.id/repository/free-online-generator-for-coin-master_GM406889139.pdfIn PDF document text
    • http://perpus.wdh.ac.id/repository/coin-master-free-daily-spins_GM406889139.pdfIn PDF document text
    • http://perpus.wdh.ac.id//repository/is-minecraft-vr-free_GM479516143.pdfIn PDF document text
    • http://perpus.wdh.ac.id/repository/free-spin-coin-master-instagram_GM406889139.pdfIn PDF document text
    • http://perpus.wdh.ac.id//repository/wwwcoin-master-hack-game-download_GM406889139.pdfIn PDF document text
    • http://perpus.wdh.ac.id/repository/roblox-robux-hack-generator_GM431946152.pdfIn PDF document text
    • http://perpus.wdh.ac.id/repository/coin-master-tool-hack_GM406889139.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_off00004a83.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4A83 25080 bytes
SHA-256: 84f5b1941125dc6488b76252638d2c71c9a01853a046b7f21565ea7d2d0226e2
font_01_sfnt_off0000837e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x837E 19880 bytes
SHA-256: b3cc443709e3d0792834aff36fc45ebf0729ec5a88bbf4f00dbe60b4c0075203

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