Malicious PDF — malware analysis report

Static analysis result for SHA-256 9b328229cf5b2e7e…

MALICIOUS

PDF

44.1 KB Created: 2021-06-03 07:20:44 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-15
MD5: 1b9e71e2d6178352c029837009e85989 SHA-1: 242aa3551a57e255f668e5aaccacd2474dfa0f94 SHA-256: 9b328229cf5b2e7e3ef49890a31f3f763bd03490d3b0f441ea28e4317bbd07a1
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple links to a known malicious redirector, specifically advertising free spins for Coin Master and other game-related cheats. The document body and heuristic firings confirm the intent to lure users to malicious infrastructure. While no scripts were directly extracted, the presence of embedded URLs and the nature of the lure strongly suggest a phishing or scam attempt.

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/get-free-spins-from-coin-master-game-hack In PDF document text
    • http://perpus.wdh.ac.id/repository/robux-link_GM431946152.pdfIn PDF document text
    • http://perpus.wdh.ac.id//repository/how-to-get-free-robux-without-surveys_GM431946152.pdfIn PDF document text
    • http://perpus.wdh.ac.id//repository/free-minecraft-education-edition_GM479516143.pdfIn PDF document text
    • http://perpus.wdh.ac.id//repository/coin-master-hack-2021-without-human-verification_GM406889139.pdfIn PDF document text
    • http://perpus.wdh.ac.id//repository/coin-master-free-2021-spin-link_GM406889139.pdfIn PDF document text
    • http://perpus.wdh.ac.id/repository/june-29-coin-master-hack-no-human-verification_GM406889139.pdfIn PDF document text
    • http://perpus.wdh.ac.id//repository/free-coins-and-spins-for-coin-master_GM406889139.pdfIn PDF document text
    • http://perpus.wdh.ac.id/repository/how-to-win-robux_GM431946152.pdfIn PDF document text
    • http://perpus.wdh.ac.id/repository/how-to-get-free-skins-in-roblox_GM431946152.pdfIn PDF document text
    • http://perpus.wdh.ac.id//repository/promo-codes-for-free-robux_GM431946152.pdfIn PDF document text
    • http://perpus.wdh.ac.id//repository/can-you-really-hack-coin-master_GM406889139.pdfIn PDF document text
    • http://perpus.wdh.ac.id//repository/coin-master-34-6-hack_GM406889139.pdfIn PDF document text
    • http://perpus.wdh.ac.id/repository/coin-master-60-spins_GM406889139.pdfIn PDF document text
    • http://perpus.wdh.ac.id//repository/free-robux-just-click_GM431946152.pdfIn PDF document text
    • http://perpus.wdh.ac.id/repository/roblox-hack-me_GM431946152.pdfIn PDF document text
    • http://perpus.wdh.ac.id//repository/minecraft-beta-free_GM479516143.pdfIn PDF document text
    • http://perpus.wdh.ac.id//repository/minecraft-pe-mod-menu_GM479516143.pdfIn PDF document text
    • http://perpus.wdh.ac.id/repository/master-coin-free-spin-daily_GM406889139.pdfIn PDF document text
    • http://perpus.wdh.ac.id//repository/how-to-get-free-robux-on-roblox_GM431946152.pdfIn PDF document text
    • http://perpus.wdh.ac.id/repository/free-robux-now_GM431946152.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_004_off000051c3.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x51C3 24744 bytes
SHA-256: 591553b2be968b50bb23f13cafe056593e40e82be7c70bc6fa1ed9e009f47c26
font_01_sfnt_off00008a39.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8A39 18148 bytes
SHA-256: 59e439861be8937ec1f5e2759ea157bb970f1ae79ac9370d5f6aa547a2452cd1

Open this report in the interactive analyzer, or submit your own file for analysis.