Malicious PDF — malware analysis report

Static analysis result for SHA-256 7a231be5283eb088…

MALICIOUS

PDF

35.6 KB Created: 2021-06-20 04:49:56 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-11-23
MD5: 4e3ddbd7d715ccaf1afc45e4d517e0f6 SHA-1: c12dc130ded9e7388d05ad7761b595b642362f69 SHA-256: 7a231be5283eb088a6a711ef9b1a00436ce45786b70cb76e4a5486d06882a245
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document contains multiple links to known malicious redirectors and lures users with promises of 'free generators' or 'game hacks'. The document body and embedded links suggest an attempt to trick users into downloading potentially malicious content. The ML classifier also strongly indicated maliciousness.

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/conseguir-robux-gratis-hack-inspeccionar-game-hack In PDF document text
    • http://perpus.stikesphi.ac.id/repository/descargar-roblox-hackeado_GM431946152.pdfIn PDF document text
    • http://perpus.stikesphi.ac.id/repository/how-to-get-free-roblox-for-computer_GM431946152.pdfIn PDF document text
    • http://perpus.stikesphi.ac.id/repository/robux-party-com-for-robux-free_GM431946152.pdfIn PDF document text
    • http://perpus.stikesphi.ac.id/repository/instant-free-spins-coin-master_GM406889139.pdfIn PDF document text
    • http://perpus.stikesphi.ac.id/repository/free-roblox-script-executor_GM431946152.pdfIn PDF document text
    • http://perpus.stikesphi.ac.id/repository/coin-master-free-spin-redeem-code_GM406889139.pdfIn PDF document text
    • http://perpus.stikesphi.ac.id/repository/coin-master-spin-hack-2021_GM406889139.pdfIn PDF document text
    • http://perpus.stikesphi.ac.id/repository/get-free-spins-coin-master-link_GM406889139.pdfIn PDF document text
    • http://perpus.stikesphi.ac.id/repository/free-robux-no-human-verification-and-no-download_GM431946152.pdfIn PDF document text
    • http://perpus.stikesphi.ac.id/repository/wurst-hacked-client-112-2_GM479516143.pdfIn PDF document text
    • http://perpus.stikesphi.ac.id/repository/roblox-girl_GM431946152.pdfIn PDF document text
    • http://perpus.stikesphi.ac.id/repository/coin-master-free-shield_GM406889139.pdfIn PDF document text
    • http://perpus.stikesphi.ac.id/repository/coin-master-daily-free-spins-haktuts_GM406889139.pdfIn PDF document text
    • http://perpus.stikesphi.ac.id/repository/how-to-get-free-robux-without-surveys_GM431946152.pdfIn PDF document text
    • http://perpus.stikesphi.ac.id/repository/roblox-free-rubox_GM431946152.pdfIn PDF document text
    • http://perpus.stikesphi.ac.id/repository/free-robux-websites-no-human-verification_GM431946152.pdfIn PDF document text
    • http://perpus.stikesphi.ac.id/repository/rewardex-robux_GM431946152.pdfIn PDF document text
    • http://perpus.stikesphi.ac.id/repository/mcpe-master-unlimited-coins-free-download_GM406889139.pdfIn PDF document text
    • http://perpus.stikesphi.ac.id/repository/can-you-actually-get-free-robux_GM431946152.pdfIn PDF document text
    • http://perpus.stikesphi.ac.id/repository/free-robux-no-human-verification-no-survey_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_off0000332c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x332C 22880 bytes
SHA-256: b2b1a340027f59cc3aa635807046eb1678365765ff81803a8e25717200905336
font_01_sfnt_off0000660b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x660B 19120 bytes
SHA-256: fbc41cad9e451c1f8869f7a5f6410577ceca700433d2cfa49f9ab59c85668e88

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