Malicious PDF — malware analysis report

Static analysis result for SHA-256 a5ac17860db6f388…

MALICIOUS

PDF

33.6 KB Created: 2021-06-28 16:56:20 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: cd47ec2cb37f98c4bbd0133eeb413e91 SHA-1: 6acac994fa6b2d81d7de0cc398e97d2666824937 SHA-256: a5ac17860db6f3888edf6b3f226bd1b1fa454a8b6dd24d72b2096d1d74ee1ffa
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple links to known malicious redirectors and sites offering game-related cheats and currency. The document body explicitly mentions 'Free Clothes On Roblox 2021' and 'CLICK HERE TO ACCESS ROBUX GENERATOR', indicating a lure for users seeking in-game advantages. While no scripts were directly extracted, the PDF structure and embedded URLs strongly suggest a phishing or scam attempt designed to lead users to malicious infrastructure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9824

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 http://netcdn.co/app/431946152/free-clothes-on-roblox-2021-game-hack In PDF document text
    • http://lib.untad.ac.id/repository/donne-du-t-shirt-hacker-roblox_GM431946152.pdfIn PDF document text
    • http://lib.untad.ac.id//repository/free-clothing-on-roblox_GM431946152.pdfIn PDF document text
    • http://lib.untad.ac.id/repository/roblox-robux-game-cheat_GM431946152.pdfIn PDF document text
    • http://lib.untad.ac.id/repository/how-to-get-minecraft-for-free-on-mac_GM479516143.pdfIn PDF document text
    • http://lib.untad.ac.id/repository/robux-free-robux-codes_GM431946152.pdfIn PDF document text
    • http://lib.untad.ac.id//repository/coin-free-spin_GM406889139.pdfIn PDF document text
    • http://lib.untad.ac.id/repository/coin-master-apk-hack-358_GM406889139.pdfIn PDF document text
    • http://lib.untad.ac.id/repository/how-to-get-roblox-protosmasher-whitlist-code-free_GM431946152.pdfIn PDF document text
    • http://lib.untad.ac.id/repository/coin-master-hack-without-verification-site-zyngaplayerforumscom_GM406889139.pdfIn PDF document text
    • http://lib.untad.ac.id//repository/universal-minecraft-converter-free_GM479516143.pdfIn PDF document text
    • http://lib.untad.ac.id/repository/how-do-i-get-free-robux-on-roblox_GM431946152.pdfIn PDF document text
    • http://lib.untad.ac.id/repository/how-to-get-free-golden-card-in-coin-master_GM406889139.pdfIn PDF document text
    • http://lib.untad.ac.id/repository/how-to-hack-people-for-real-on-roblox_GM431946152.pdfIn PDF document text
    • http://lib.untad.ac.id/repository/dragon-ball-flaming-path-hack-roblox_GM431946152.pdfIn PDF document text
    • http://lib.untad.ac.id/repository/console-hack-robux-no-subscribe-2021_GM431946152.pdfIn PDF document text
    • http://lib.untad.ac.id/repository/free-account-roblox-with-robux_GM431946152.pdfIn PDF document text
    • http://lib.untad.ac.id/repository/cheat-engine-63-roblox-codes_GM431946152.pdfIn PDF document text
    • http://lib.untad.ac.id/repository/coin-master-free-spins-link-2021_GM406889139.pdfIn PDF document text
    • http://lib.untad.ac.id/repository/free-minecraft-skins-java_GM479516143.pdfIn PDF document text
    • http://lib.untad.ac.id//repository/how-to-make-roblox-clothes-for-free_GM431946152.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
font_00_sfnt_off00002acc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2ACC 22684 bytes
SHA-256: c80e4bf6975e50fa7d518d9c6abae57ca88a1255ab25812989587989bf848760
font_01_sfnt_off00005db7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5DB7 19320 bytes
SHA-256: 4e2a053f1c5a9e780094ca75eae8bdcafbb3a4976441d0e07eced009fc4bad18

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