Malicious PDF — malware analysis report

Static analysis result for SHA-256 c6381f825e5ec3e9…

MALICIOUS

PDF

34.9 KB Created: 2021-06-28 05:05:29 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-08-25
MD5: 28c924e18dca4c6b7f6cec363b756e42 SHA-1: 8419fbef4dead3818c71788338d463c6168f5575 SHA-256: c6381f825e5ec3e99df144f852fee566c543a45a0b091427fd8da75871548df3
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple links and embedded text promoting 'free Robux' and game hacks, directly leading to a known malicious redirector. The primary lure is to trick users into visiting the malicious URL, likely to deliver a secondary payload or conduct further phishing. No scripts were extracted, but the document's structure and content strongly indicate a phishing or scam attempt.

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-easy-and-quick-game-hack In PDF document text
    • https://elearning.nurulhuda.sch.id/__statics/gudangsoal/files/how-to-make-a-free-roblox-audio_GM431946152.pdfIn PDF document text
    • https://elearning.nurulhuda.sch.id/__statics/gudangsoal/files/free-spin-link-coin-master-today_GM406889139.pdfIn PDF document text
    • https://elearning.nurulhuda.sch.id/__statics/gudangsoal/files/roblox-piano-sheets-hack_GM431946152.pdfIn PDF document text
    • https://elearning.nurulhuda.sch.id/__statics/gudangsoal/files/websites-to-get-free-robux_GM431946152.pdfIn PDF document text
    • https://elearning.nurulhuda.sch.id/__statics/gudangsoal/files/vido-roblox-free-robux-generatorcom_GM431946152.pdfIn PDF document text
    • https://elearning.nurulhuda.sch.id/__statics/gudangsoal/files/lazyblox-com-free-robux_GM431946152.pdfIn PDF document text
    • https://elearning.nurulhuda.sch.id/__statics/gudangsoal/files/free-roblox-accounts-with-robux_GM431946152.pdfIn PDF document text
    • https://elearning.nurulhuda.sch.id/__statics/gudangsoal/files/coin-master-hack-without-human-verification_GM406889139.pdfIn PDF document text
    • https://elearning.nurulhuda.sch.id/__statics/gudangsoal/files/free-robux-generator-2021-no-survey_GM431946152.pdfIn PDF document text
    • https://elearning.nurulhuda.sch.id/__statics/gudangsoal/files/free-coin-master-cards_GM406889139.pdfIn PDF document text
    • https://elearning.nurulhuda.sch.id/__statics/gudangsoal/files/minecraft-server-hacks_GM479516143.pdfIn PDF document text
    • https://elearning.nurulhuda.sch.id/__statics/gudangsoal/files/hackear-coin-master_GM406889139.pdfIn PDF document text
    • https://elearning.nurulhuda.sch.id/__statics/gudangsoal/files/how-to-get-free-robux-not-a-scam_GM431946152.pdfIn PDF document text
    • https://elearning.nurulhuda.sch.id/__statics/gudangsoal/files/roblox-for-robux-free_GM431946152.pdfIn PDF document text
    • https://elearning.nurulhuda.sch.id/__statics/gudangsoal/files/do-coin-master-hacks-work_GM406889139.pdfIn PDF document text
    • https://elearning.nurulhuda.sch.id/__statics/gudangsoal/files/roblox-hack-gui-tutorial_GM431946152.pdfIn PDF document text
    • https://elearning.nurulhuda.sch.id/__statics/gudangsoal/files/roblox-commands-hack-2021_GM431946152.pdfIn PDF document text
    • https://elearning.nurulhuda.sch.id/__statics/gudangsoal/files/minecraft-education-free_GM479516143.pdfIn PDF document text
    • https://elearning.nurulhuda.sch.id/__statics/gudangsoal/files/roblox-com-hack_GM431946152.pdfIn PDF document text
    • https://elearning.nurulhuda.sch.id/__statics/gudangsoal/files/hack-retail-tycoon-roblox_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_off00002fe6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2FE6 22128 bytes
SHA-256: 8a1fc3cd803af1689bb10203bffcaf9d3fd9d31334526095f678b6b3f592b4a1
font_01_sfnt_off000060e0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x60E0 19784 bytes
SHA-256: 947de2f8e583b44caf4bd95a066a4fdb995372dafa1685aed2e1bcd33f50b804

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