Malicious PDF — malware analysis report

Static analysis result for SHA-256 6478b5d67039752e…

MALICIOUS

PDF

36.0 KB Created: 2021-07-01 01:04:58 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: 9662c0c7ec61dbb7d1baacb540099a6e SHA-1: 77b0b01603033f1e7c33cc51267cb1d50b0fcdf9 SHA-256: 6478b5d67039752e6efc24aacd2299b901e3d48c52b82df11bd322673f5aa31e
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document contains multiple links to websites offering 'free generators' or 'game hacks', which is a common lure for malicious content. The heuristic firings confirm these links point to known malicious redirectors and a general ML classifier flagged the PDF as malicious. The document body text reinforces the lure by mentioning 'free Robux' and 'game hack'.

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.co/app/431946152/how-to-get-free-robux-joke-game-hack In PDF document text
    • https://learnwmf.org/image/data/files/bux-gg-robux-free_GM431946152.pdfIn PDF document text
    • https://learnwmf.org/image/data/files/minecraft-hacks-pc_GM479516143.pdfIn PDF document text
    • https://learnwmf.org/image/data/files/coin-master-hack-without-human-verification-2021_GM406889139.pdfIn PDF document text
    • https://learnwmf.org/image/data/files/wizard-hacks_GM479516143.pdfIn PDF document text
    • https://learnwmf.org/image/data/files/free-unlimited-robux_GM431946152.pdfIn PDF document text
    • https://learnwmf.org/image/data/files/minecraft-windows-10-edition-free-with-java_GM479516143.pdfIn PDF document text
    • https://learnwmf.org/image/data/files/free-spins-for-coin-master-app_GM406889139.pdfIn PDF document text
    • https://learnwmf.org/image/data/files/coin-master-game-free_GM406889139.pdfIn PDF document text
    • https://learnwmf.org/image/data/files/how-to-get-a-lue-injector-for-hacking-roblox_GM431946152.pdfIn PDF document text
    • https://learnwmf.org/image/data/files/free-robux-no-apps-no-human-verification_GM431946152.pdfIn PDF document text
    • https://learnwmf.org/image/data/files/free-coins-on-coin-master_GM406889139.pdfIn PDF document text
    • https://learnwmf.org/image/data/files/free-robux-without-any-verification_GM431946152.pdfIn PDF document text
    • https://learnwmf.org/image/data/files/can-you-get-robux-for-free_GM431946152.pdfIn PDF document text
    • https://learnwmf.org/image/data/files/free-robux-scams_GM431946152.pdfIn PDF document text
    • https://learnwmf.org/image/data/files/free-robux-no-human-verification-or-survey-2021_GM431946152.pdfIn PDF document text
    • https://learnwmf.org/image/data/files/roblox-ways-to-cheat-money-on-vehicle-simulater_GM431946152.pdfIn PDF document text
    • https://learnwmf.org/image/data/files/claim-free-robux_GM431946152.pdfIn PDF document text
    • https://learnwmf.org/image/data/files/roblox-cartoony-animation-free_GM431946152.pdfIn PDF document text
    • https://learnwmf.org/image/data/files/good-outfit-ideas-for-free-roblox_GM431946152.pdfIn PDF document text
    • https://learnwmf.org/image/data/files/roblox-imagine_GM431946152.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_off0000338f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x338F 22904 bytes
SHA-256: fc50c1483fc05801afe41b56062a97ac47b3575d79879ddc44fe7529e493c1e4
font_01_sfnt_off000066ee.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x66EE 19320 bytes
SHA-256: cea8a3cd1251f47a20483f7da64e3b86979fd1c1f7cf010ee4cc1c9617adabda

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