Malicious PDF — malware analysis report

Static analysis result for SHA-256 f417ac839fa2a322…

MALICIOUS

PDF

33.9 KB Created: 2021-07-08 16:30:50 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: 268f649948dab663369770d738d3aa29 SHA-1: 1b55ec396dd1ce3ff096ecc6ae9ab76510bf8cb2 SHA-256: f417ac839fa2a322389a6f8aff15fada59e4c63b3a90a3de971a88cc20f3beb6
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains embedded links that lead to known malicious redirectors, specifically promoting 'game hacks' and 'free generators'. The primary lure URL is http://netcdn.tw/app/479516143/how-to-play-minecraft-for-free-game-hack. While no scripts were explicitly extracted, the PDF structure and heuristic firings indicate a malicious redirector workflow designed to trick users into visiting potentially harmful sites. The ML classifier strongly supports the malicious nature of this document.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

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.tw/app/479516143/how-to-play-minecraft-for-free-game-hack In PDF document text
    • https://elearning.hidayatussalam.sch.id/__statics/gudangsoal/files/coin-master-free-spins-link-2021-hack_GM406889139.pdfIn PDF document text
    • https://elearning.hidayatussalam.sch.id/__statics/gudangsoal/files/robux-com-free_GM431946152.pdfIn PDF document text
    • http://elearning.hidayatussalam.sch.id/__statics/gudangsoal/files/android-coin-master-hack_GM406889139.pdfIn PDF document text
    • https://elearning.hidayatussalam.sch.id/__statics/gudangsoal/files/free-roblox-accounts-2021-april_GM431946152.pdfIn PDF document text
    • http://elearning.hidayatussalam.sch.id/__statics/gudangsoal/files/roblox-god-hack-2021_GM431946152.pdfIn PDF document text
    • https://elearning.hidayatussalam.sch.id/__statics/gudangsoal/files/minecraft-client-download_GM479516143.pdfIn PDF document text
    • https://elearning.hidayatussalam.sch.id/__statics/gudangsoal/files/free-robux-hack-no-verification-or-survey-2021_GM431946152.pdfIn PDF document text
    • https://elearning.hidayatussalam.sch.id/__statics/gudangsoal/files/get-free-robux-info_GM431946152.pdfIn PDF document text
    • http://elearning.hidayatussalam.sch.id/__statics/gudangsoal/files/coin-master-hack-ios-jailbreak_GM406889139.pdfIn PDF document text
    • http://elearning.hidayatussalam.sch.id/__statics/gudangsoal/files/free-roblox-account-genirtor_GM431946152.pdfIn PDF document text
    • https://elearning.hidayatussalam.sch.id/__statics/gudangsoal/files/how-to-get-free-robux-youtube_GM431946152.pdfIn PDF document text
    • https://elearning.hidayatussalam.sch.id/__statics/gudangsoal/files/coin-master-free-spins-link-2021-twitter_GM406889139.pdfIn PDF document text
    • http://elearning.hidayatussalam.sch.id/__statics/gudangsoal/files/how-to-hack-accounts-on-roblox-on-ipad_GM431946152.pdfIn PDF document text
    • http://elearning.hidayatussalam.sch.id/__statics/gudangsoal/files/roblox-fly-hack-code_GM431946152.pdfIn PDF document text
    • http://elearning.hidayatussalam.sch.id/__statics/gudangsoal/files/roblox-free-robux-no-human-verification_GM431946152.pdfIn PDF document text
    • http://elearning.hidayatussalam.sch.id/__statics/gudangsoal/files/prmocodes-roblox-hack_GM431946152.pdfIn PDF document text
    • http://elearning.hidayatussalam.sch.id/__statics/gudangsoal/files/como-hackear-coin-master-2021_GM406889139.pdfIn PDF document text
    • http://elearning.hidayatussalam.sch.id/__statics/gudangsoal/files/free-halloween-stuff-roblox_GM431946152.pdfIn PDF document text
    • https://elearning.hidayatussalam.sch.id/__statics/gudangsoal/files/hack-jailbreak-roblox-7-february-2021_GM431946152.pdfIn PDF document text
    • http://elearning.hidayatussalam.sch.id/__statics/gudangsoal/files/coin-master-game-hacks_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
font_00_sfnt_off00003142.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x3142 21796 bytes
SHA-256: ad48ad58e02570d39b75ed7aff1030de5418b8e7e9e2eee76dbf1840bf6ceed9
font_01_sfnt_off0000611e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x611E 18568 bytes
SHA-256: 6dc61538ed724bc6443f50b8479ccc6628e34517d99e5003dfe37ed8210b2c8a

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