Malicious PDF — malware analysis report

Static analysis result for SHA-256 56ab78f4c0f9fa8c…

MALICIOUS

PDF

49.1 KB Created: 2021-06-11 09:49:44 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: c30a0319f6424d8dead58a91eef291ea SHA-1: 73cddb051b0e7d82d0954800c9b1bf1f5dcef476 SHA-256: 56ab78f4c0f9fa8c8577399bc8c92ceab28abd323fd74250dbdb62f892b5822a
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains links to a known malicious redirector infrastructure, specifically advertising a 'Roblox Hacker Smilator Wild West' generator. This indicates a social engineering lure designed to trick users into visiting a potentially harmful site. The presence of embedded URLs and the ML classifier strongly support a malicious classification.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9871

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/roblox-hacker-smilator-wild-west-game-hack In PDF document text
    • http://repository.ummy.ac.id//repository/free-spins-coin-master-ios-2021_GM406889139.pdfIn PDF document text
    • http://repository.ummy.ac.id//repository/how-do-u-get-free-robux-2021_GM431946152.pdfIn PDF document text
    • http://repository.ummy.ac.id//repository/free-spins-on-coin-master_GM406889139.pdfIn PDF document text
    • http://repository.ummy.ac.id//repository/roblox-robux-codes-2021_GM431946152.pdfIn PDF document text
    • http://repository.ummy.ac.id//repository/free-robux-without-any-verification_GM431946152.pdfIn PDF document text
    • http://repository.ummy.ac.id//repository/can-you-earn-robux_GM431946152.pdfIn PDF document text
    • http://repository.ummy.ac.id/repository/roblox-free-modles_GM431946152.pdfIn PDF document text
    • http://repository.ummy.ac.id//repository/coin-master-hacks-free-spins_GM406889139.pdfIn PDF document text
    • http://repository.ummy.ac.id//repository/roblox-help-free-robux_GM431946152.pdfIn PDF document text
    • http://repository.ummy.ac.id/repository/free-tiktok-like_GM835599320.pdfIn PDF document text
    • http://repository.ummy.ac.id//repository/coin-master-free-500-spins-link_GM406889139.pdfIn PDF document text
    • http://repository.ummy.ac.id/repository/cheat-on-roblox-2021_GM431946152.pdfIn PDF document text
    • http://repository.ummy.ac.id/repository/fre-robux-now_GM431946152.pdfIn PDF document text
    • http://repository.ummy.ac.id/repository/give-me-free-robux_GM431946152.pdfIn PDF document text
    • http://repository.ummy.ac.id//repository/coin-master-hack-version-download-2021-android_GM406889139.pdfIn PDF document text
    • http://repository.ummy.ac.id//repository/rbl-gg-free-robux_GM431946152.pdfIn PDF document text
    • http://repository.ummy.ac.id//repository/robux-hack-no-human-verification_GM431946152.pdfIn PDF document text
    • http://repository.ummy.ac.id/repository/roblox-games-where-you-can-get-free-stuff_GM431946152.pdfIn PDF document text
    • http://repository.ummy.ac.id//repository/do-robux-generators-work_GM431946152.pdfIn PDF document text
    • http://repository.ummy.ac.id//repository/free-robux-on-phone_GM431946152.pdfIn PDF document text
    • https://www.communes.comIn 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_off000053c8.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x53C8 31460 bytes
SHA-256: a37c175688d87748771c8ff503f3a637cab9803d109cc76a2cbf1eb609d89b42
font_01_sfnt_off00009b52.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9B52 19036 bytes
SHA-256: 00acb02bc34e93dfd15a9c2178a0a1f6f4cb571bb5178c00f8d7f15c77866e34

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