Malicious PDF — malware analysis report

Static analysis result for SHA-256 e584e2c1aeeb09bb…

MALICIOUS

PDF

47.8 KB Created: 2021-06-03 10:55:36 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: cef922dc0e50ae0e3eaf81b463bbcedf SHA-1: 72f9debc2751c1eb87c6f2adc1673ecac8f8944a SHA-256: e584e2c1aeeb09bba066fcc0fce77e7637d2c85b4434b81a67921cb45ad5c123
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains embedded links that redirect to malicious infrastructure, masquerading as game hacks or generators. The primary lure is a link to 'Inject Hack Robux 2021' which points to a known malicious redirector. While no scripts were explicitly extracted, the PDF structure and embedded URLs strongly suggest a phishing or social engineering attack aimed at tricking users into visiting malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9769

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/431946152/inject-hack-robux-2021-game-hack In PDF document text
    • https://lib-stie.yai.ac.id/repository/how-to-get-free-roblox-money_GM431946152.pdfIn PDF document text
    • https://lib-stie.yai.ac.id/repository/coin-master-free-coins-and-spins_GM406889139.pdfIn PDF document text
    • https://lib-stie.yai.ac.id/repository/roblox-hack-download_GM431946152.pdfIn PDF document text
    • https://lib-stie.yai.ac.id/repository/minecraft-diamond-finder-hack_GM479516143.pdfIn PDF document text
    • https://lib-stie.yai.ac.id/repository/how-to-get-free-robux-fast-and-easy_GM431946152.pdfIn PDF document text
    • https://lib-stie.yai.ac.id/repository/coin-master-free-spins_GM406889139.pdfIn PDF document text
    • https://lib-stie.yai.ac.id/repository/give-free-robux_GM431946152.pdfIn PDF document text
    • https://lib-stie.yai.ac.id/repository/pokemon-go-free-stardust_GM1094591345.pdfIn PDF document text
    • https://lib-stie.yai.ac.id/repository/free-robux-no-verification-or-survey_GM431946152.pdfIn PDF document text
    • https://lib-stie.yai.ac.id/repository/roblox-fun-com-free-robux_GM431946152.pdfIn PDF document text
    • https://lib-stie.yai.ac.id/repository/hacks-to-get-free-robux_GM431946152.pdfIn PDF document text
    • https://lib-stie.yai.ac.id/repository/free-spin-in-coin-master_GM406889139.pdfIn PDF document text
    • https://lib-stie.yai.ac.id/repository/pokemon-go-free-remote-raid-pass-january-2021_GM1094591345.pdfIn PDF document text
    • https://lib-stie.yai.ac.id/repository/daily-coin-master-free-spins_GM406889139.pdfIn PDF document text
    • https://lib-stie.yai.ac.id/repository/free-robux-generator-2021-no-human-verification-or-survey_GM431946152.pdfIn PDF document text
    • https://lib-stie.yai.ac.id/repository/pubg-uc-zarah_GM1330123889.pdfIn PDF document text
    • https://lib-stie.yai.ac.id/repository/haktuts-coin-master-free-daily-spins_GM406889139.pdfIn PDF document text
    • https://lib-stie.yai.ac.id/repository/how-to-hack-roblox-accounts-for-robux_GM431946152.pdfIn PDF document text
    • https://lib-stie.yai.ac.id/repository/free-minecraft-java-account_GM479516143.pdfIn PDF document text
    • https://lib-stie.yai.ac.id/repository/can-i-get-free-robux_GM431946152.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_004_off000050ca.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x50CA 24696 bytes
SHA-256: 0860f27c2ff9ddf2f39b7ca313a7a89c042d1db1f3674d5566eaa72a68cf69f1
font_01_sfnt_off00008925.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8925 5596 bytes
SHA-256: 9a13c2580265a78e8a7257496a31ee0055738af7e20a5661c2902efe4bf05ce5
font_02_sfnt_off000095cd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x95CD 18940 bytes
SHA-256: 9f20023373d8808542471b9e442569fafa6788957aa2cfb2f02c85fd2f1e0aac

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