Malicious PDF — malware analysis report

Static analysis result for SHA-256 76baaec429a36407…

MALICIOUS

PDF

35.8 KB Created: 2021-07-05 20:01:34 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-11-24
MD5: 4a4dd85dde4d97bb864945b1b6cebc11 SHA-1: 4f8018f9fd6f600b041abe8b08f4f9ba1e0276f2 SHA-256: 76baaec429a36407fbd0be040783f58c232b062f02249a5e1361960cc06f5618
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF document contains a lure for free Robux and game hacks, directing users to a known malicious redirector. The embedded URL `http://netcdn.tw/app/431946152/how-do-i-get-free-robux-game-hack` is identified as malicious. While no scripts were explicitly extracted, the PDF structure and the nature of the lure suggest it's designed to exploit user interest in free in-game currency, likely leading to further malicious activity or credential harvesting.

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/how-do-i-get-free-robux-game-hack In PDF document text
    • https://man1kotasmi.sch.id/__statics/gudangsoal/files/coin-master-email-free-spins_GM406889139.pdfIn PDF document text
    • https://man1kotasmi.sch.id/__statics/gudangsoal/files/hack-para-dragon-ball-rage-roblox-2021-pc_GM431946152.pdfIn PDF document text
    • https://man1kotasmi.sch.id/__statics/gudangsoal/files/actual-free-robux_GM431946152.pdfIn PDF document text
    • https://man1kotasmi.sch.id/__statics/gudangsoal/files/how-to-get-minecraft-for-free-on-iphone_GM479516143.pdfIn PDF document text
    • https://man1kotasmi.sch.id/__statics/gudangsoal/files/ap-get-free-robux-and-tips-for-roblox-2021_GM431946152.pdfIn PDF document text
    • https://man1kotasmi.sch.id/__statics/gudangsoal/files/coin-master-card-collection-link_GM406889139.pdfIn PDF document text
    • https://man1kotasmi.sch.id/__statics/gudangsoal/files/minecraft-mod-menu_GM479516143.pdfIn PDF document text
    • https://man1kotasmi.sch.id/__statics/gudangsoal/files/how-to-hack-kat-roblox_GM431946152.pdfIn PDF document text
    • https://man1kotasmi.sch.id/__statics/gudangsoal/files/freerobux-hack-us_GM431946152.pdfIn PDF document text
    • https://man1kotasmi.sch.id/__statics/gudangsoal/files/how-to-get-free-robux-no-human-verification_GM431946152.pdfIn PDF document text
    • https://man1kotasmi.sch.id/__statics/gudangsoal/files/lazyblocks-com-robux_GM431946152.pdfIn PDF document text
    • https://man1kotasmi.sch.id/__statics/gudangsoal/files/shredder-machine-roblox-free_GM431946152.pdfIn PDF document text
    • https://man1kotasmi.sch.id/__statics/gudangsoal/files/free-roblox-passwords_GM431946152.pdfIn PDF document text
    • https://man1kotasmi.sch.id/__statics/gudangsoal/files/how-to-hack-roblox-jailbreak-on-android_GM431946152.pdfIn PDF document text
    • https://man1kotasmi.sch.id/__statics/gudangsoal/files/coin-master-free-spin-codes_GM406889139.pdfIn PDF document text
    • https://man1kotasmi.sch.id/__statics/gudangsoal/files/free-robux-gift-card_GM431946152.pdfIn PDF document text
    • https://man1kotasmi.sch.id/__statics/gudangsoal/files/coin-master-free-spins-without-human-verification_GM406889139.pdfIn PDF document text
    • https://man1kotasmi.sch.id/__statics/gudangsoal/files/best-minecraft-hacks_GM479516143.pdfIn PDF document text
    • https://man1kotasmi.sch.id/__statics/gudangsoal/files/get-free-spins-coin-master_GM406889139.pdfIn PDF document text
    • https://man1kotasmi.sch.id/__statics/gudangsoal/files/how-to-hack-and-get-free-robux_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_off0000337c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x337C 22792 bytes
SHA-256: 8b5bc6a8330f73b4d2ebbdd16376350084c5048ca21f328c34ff55d2e0146af2
font_01_sfnt_off00006674.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6674 19152 bytes
SHA-256: dbadd7ca2f39853e1d628412f433763acd544662f92d7d1ac8e48e35ccd177e9

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