Malicious PDF — malware analysis report

Static analysis result for SHA-256 5eb8768fdadb9a05…

MALICIOUS

PDF

34.7 KB Created: 2021-07-06 18:20:45 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-16
MD5: 451e033161e7505004ac3bd2bac38cf5 SHA-1: ad68c4e188ac1523b111263c2a0d105a75aecbd8 SHA-256: 5eb8768fdadb9a05c0cf424d0abe073afa4b68a6460617a7148757637d0ee675
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document contains multiple links, including one identified as a malicious redirector, leading to a 'game hack' lure. The primary link, http://netcdn.tw/app/406889139/coin-master-lucky-patcher-hack-game-hack, is designed to trick users into downloading potentially unwanted or malicious software. The document body and embedded URLs strongly suggest a social engineering tactic to drive traffic to these sites.

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/406889139/coin-master-lucky-patcher-hack-game-hack In PDF document text
    • https://www.ferraroni.net/public/risorse/ck/files/how-to-hack-into-roblox-to-get-robux_GM431946152.pdfIn PDF document text
    • https://www.ferraroni.net/public/risorse/ck/files/free-robux-no-verification-2021_GM431946152.pdfIn PDF document text
    • https://www.ferraroni.net/public/risorse/ck/files/get-free-robux-without-doing-anything_GM431946152.pdfIn PDF document text
    • https://www.ferraroni.net/public/risorse/ck/files/robloxmatchcom-free-robux_GM431946152.pdfIn PDF document text
    • https://www.ferraroni.net/public/risorse/ck/files/coin-master-spins-hack-2021_GM406889139.pdfIn PDF document text
    • https://www.ferraroni.net/public/risorse/ck/files/how-to-get-free-spins-on-coin-master-without-waiting_GM406889139.pdfIn PDF document text
    • https://www.ferraroni.net/public/risorse/ck/files/moonactive-coin-master-free-spins_GM406889139.pdfIn PDF document text
    • https://www.ferraroni.net/public/risorse/ck/files/coin-master-free-coins-amp_GM406889139.pdfIn PDF document text
    • https://www.ferraroni.net/public/risorse/ck/files/free-roblox-accounts-2021-with-pin_GM431946152.pdfIn PDF document text
    • https://www.ferraroni.net/public/risorse/ck/files/hacks-for-mortem-metallum-roblox_GM431946152.pdfIn PDF document text
    • https://www.ferraroni.net/public/risorse/ck/files/daily-coin-master-free-link_GM406889139.pdfIn PDF document text
    • https://www.ferraroni.net/public/risorse/ck/files/how-to-get-more-robux-for-free_GM431946152.pdfIn PDF document text
    • https://www.ferraroni.net/public/risorse/ck/files/coin-master-free-spins-2021_GM406889139.pdfIn PDF document text
    • https://www.ferraroni.net/public/risorse/ck/files/coin-master-gold-cards-free-2021_GM406889139.pdfIn PDF document text
    • https://www.ferraroni.net/public/risorse/ck/files/roblox-free-robux-game-guardian_GM431946152.pdfIn PDF document text
    • https://www.ferraroni.net/public/risorse/ck/files/free-robux-hack-no-human-verification-or-survey_GM431946152.pdfIn PDF document text
    • https://www.ferraroni.net/public/risorse/ck/files/tiktok-download-free-jio-mobile_GM835599320.pdfIn PDF document text
    • https://www.ferraroni.net/public/risorse/ck/files/roblox-free-skin_GM431946152.pdfIn PDF document text
    • https://www.ferraroni.net/public/risorse/ck/files/trigon-roblox-hack-download_GM431946152.pdfIn PDF document text
    • https://www.ferraroni.net/public/risorse/ck/files/v3rmillion-roblox-hack-script-fnaf_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_off000030b8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x30B8 22844 bytes
SHA-256: 00d38a6e27eb78dea99762feb1ee57add076287fac7823ab1374370acaa45420
font_01_sfnt_off000063f2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x63F2 18644 bytes
SHA-256: b50b173be50f9302281c7422bba98a22c41da8c4de65aa2e26468e7f8a175577

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