Malicious PDF — malware analysis report

Static analysis result for SHA-256 a32604b5fa2c27b9…

MALICIOUS

PDF

44.9 KB Created: 2021-06-03 09:12:14 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-27
MD5: 45d943e19eb048ac451fe0b11c307997 SHA-1: 3df3364742870d892e3b3950ef7a1f9b9b25f023 SHA-256: a32604b5fa2c27b908d234e722d8ed223a4e4757ab0eb2bfdc0f903dad79648b
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple embedded URLs that redirect to a "free generator / game hack" lure, indicating a phishing or scam attempt. The ML classifier strongly flagged this PDF as malicious, and the presence of redirector links confirms malicious intent. Although no scripts were explicitly extracted, the PDF structure and embedded links suggest it's designed to lead the user to a malicious site, likely for credential harvesting or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9865

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.online/app/406889139/coin-master-daily-free-spin-and-coin-link-game-hack In PDF document text
    • http://library.apsidoarjo.ac.id/repository/robux-earner_GM431946152.pdfIn PDF document text
    • http://library.apsidoarjo.ac.id/repository/roblox-demon_GM431946152.pdfIn PDF document text
    • http://library.apsidoarjo.ac.id//repository/minecraft-115-2-hacks_GM479516143.pdfIn PDF document text
    • http://library.apsidoarjo.ac.id//repository/minecraft-bedrock-download_GM479516143.pdfIn PDF document text
    • http://library.apsidoarjo.ac.id/repository/coin-master-blogspot-free-spins_GM406889139.pdfIn PDF document text
    • http://library.apsidoarjo.ac.id/repository/roblox-games-free_GM431946152.pdfIn PDF document text
    • http://library.apsidoarjo.ac.id/repository/discord-for-roblox-swear-hack_GM431946152.pdfIn PDF document text
    • http://library.apsidoarjo.ac.id//repository/coin-master-free-blogspot_GM406889139.pdfIn PDF document text
    • http://library.apsidoarjo.ac.id/repository/get-free-tiktok-likes_GM835599320.pdfIn PDF document text
    • http://library.apsidoarjo.ac.id/repository/was-minecraft-ever-free_GM479516143.pdfIn PDF document text
    • http://library.apsidoarjo.ac.id/repository/free-tiktok-views-no-verification_GM835599320.pdfIn PDF document text
    • http://library.apsidoarjo.ac.id/repository/how-to-play-minecraft-with-friends-for-free_GM479516143.pdfIn PDF document text
    • http://library.apsidoarjo.ac.id/repository/how-to-host-a-minecraft-server-for-free_GM479516143.pdfIn PDF document text
    • http://library.apsidoarjo.ac.id/repository/free-followers-for-tiktok_GM835599320.pdfIn PDF document text
    • http://library.apsidoarjo.ac.id//repository/official-coin-master-free-spins_GM406889139.pdfIn PDF document text
    • http://library.apsidoarjo.ac.id/repository/best-minecraft-hacked-client_GM479516143.pdfIn PDF document text
    • http://library.apsidoarjo.ac.id/repository/coin-master-15-free-spin-link-today_GM406889139.pdfIn PDF document text
    • http://library.apsidoarjo.ac.id/repository/coin-master-70-spin-link-2021_GM406889139.pdfIn PDF document text
    • http://library.apsidoarjo.ac.id//repository/free-spins-on-coin-master-app_GM406889139.pdfIn PDF document text
    • http://library.apsidoarjo.ac.id//repository/coin-master-spin-free_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_004_off00005441.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x5441 24452 bytes
SHA-256: 48e5fa8e0ed0563725ca22aad763cd9f12534d9d4cd7f15aa230563e3f6f6908
font_01_sfnt_off00008bec.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8BEC 18652 bytes
SHA-256: 9153e8ff570dd88c4a620839e4728b6040b622f618f6f7694a5530f56d9e896e

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