Malicious PDF — malware analysis report

Static analysis result for SHA-256 ffe5ab4d78f612b6…

MALICIOUS

PDF

35.0 KB Created: 2021-07-04 13:11:52 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: 2ff76dd1d64b89d8050891a25fa7f175 SHA-1: 5f5b782bedbdea4ef1425c98b8300190d2c39354 SHA-256: ffe5ab4d78f612b6a7d9bea30776cf639c2bbc173b488091accd5649e524a04c
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple heuristics indicating it is a malicious redirector lure, specifically targeting users interested in game hacks and free currency. The document body and embedded URLs point to a primary redirector at 'http://netcdn.tw/app/431946152/get-free-robux-no-verification-game-hack', which is likely used to deliver a second-stage payload or phishing content. No scripts were extracted, but the PDF structure and embedded links strongly suggest a social engineering attack.

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/431946152/get-free-robux-no-verification-game-hack In PDF document text
    • https://elearning-min4jakarta.sch.id/__statics/gudangsoal/files/minecraft-pocket-edition-free-download_GM479516143.pdfIn PDF document text
    • https://elearning-min4jakarta.sch.id/__statics/gudangsoal/files/how-to-get-free-robux-without-doing-anything-2021_GM431946152.pdfIn PDF document text
    • https://elearning-min4jakarta.sch.id/__statics/gudangsoal/files/minecraft-beta-free_GM479516143.pdfIn PDF document text
    • https://elearning-min4jakarta.sch.id/__statics/gudangsoal/files/coin-master-how-to-get-japan-sushi-card-free_GM406889139.pdfIn PDF document text
    • https://elearning-min4jakarta.sch.id/__statics/gudangsoal/files/coin-master-free-spins-and-free-coins_GM406889139.pdfIn PDF document text
    • https://elearning-min4jakarta.sch.id/__statics/gudangsoal/files/coin-master-free-spins-blogspot_GM406889139.pdfIn PDF document text
    • https://elearning-min4jakarta.sch.id/__statics/gudangsoal/files/how-to-get-free-robux-with-games_GM431946152.pdfIn PDF document text
    • https://elearning-min4jakarta.sch.id/__statics/gudangsoal/files/minecraft-pe-free-apk_GM479516143.pdfIn PDF document text
    • https://elearning-min4jakarta.sch.id/__statics/gudangsoal/files/how-do-u-hack-roblox_GM431946152.pdfIn PDF document text
    • https://elearning-min4jakarta.sch.id/__statics/gudangsoal/files/free-robux-generator_GM431946152.pdfIn PDF document text
    • https://elearning-min4jakarta.sch.id/__statics/gudangsoal/files/roblox-gun-hack_GM431946152.pdfIn PDF document text
    • https://elearning-min4jakarta.sch.id/__statics/gudangsoal/files/free-robux-automatically_GM431946152.pdfIn PDF document text
    • https://elearning-min4jakarta.sch.id/__statics/gudangsoal/files/minecraft-hacked-client-18_GM479516143.pdfIn PDF document text
    • https://elearning-min4jakarta.sch.id/__statics/gudangsoal/files/coin-master-hack-activegamer_GM406889139.pdfIn PDF document text
    • https://elearning-min4jakarta.sch.id/__statics/gudangsoal/files/i-cant-get-free-spins-coin-master_GM406889139.pdfIn PDF document text
    • https://elearning-min4jakarta.sch.id/__statics/gudangsoal/files/coin-master-100-spin-hack_GM406889139.pdfIn PDF document text
    • https://elearning-min4jakarta.sch.id/__statics/gudangsoal/files/how-do-you-get-free-stuff-in-roblox_GM431946152.pdfIn PDF document text
    • https://elearning-min4jakarta.sch.id/__statics/gudangsoal/files/robux-matchcomfree-robux_GM431946152.pdfIn PDF document text
    • https://elearning-min4jakarta.sch.id/__statics/gudangsoal/files/get-free-robux-no-verification_GM431946152.pdfIn PDF document text
    • https://elearning-min4jakarta.sch.id/__statics/gudangsoal/files/coin-master-free-spins-and-coins-2021_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_off00003111.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x3111 22692 bytes
SHA-256: 932647c6fdc5a59cdeb9eee0045cf0f9088ceaf7de99d8a4a26ae8c61183a8d7
font_01_sfnt_off000063d8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x63D8 19072 bytes
SHA-256: e72ada6374821b36eed7d40ca7e66d9301b0fa24814d932b66fe4108e9a41cd9

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