Malicious PDF — malware analysis report

Static analysis result for SHA-256 0946f291a7f0bca7…

MALICIOUS

PDF

34.2 KB Created: 2021-07-04 20:36:33 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-31
MD5: e666f0faaa60276878f6145f964012a0 SHA-1: b5e98c45415ff82b00acfc367fbaca659f4e3e1e SHA-256: 0946f291a7f0bca791eaf3886e280a782f6870e4b8279ac26fa0c38659fc6aeb
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple links to a known malicious redirector, disguised as a 'free generator' for popular games. The document body and extracted URLs strongly suggest a lure for users seeking game cheats or currency, which is a common tactic for distributing malware or leading to phishing sites. No scripts were extracted, but the presence of malicious redirector links is a high-confidence indicator of malicious intent.

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/free-coin-master-hacks-game-hack In PDF document text
    • http://libsmpn1balongpo.sch.id/repository/roblox-skin-snake-free_GM431946152.pdfIn PDF document text
    • http://libsmpn1balongpo.sch.id//repository/free-spins-coin-master-october-17-2021_GM406889139.pdfIn PDF document text
    • http://libsmpn1balongpo.sch.id//repository/roblox-hack-game_GM431946152.pdfIn PDF document text
    • http://libsmpn1balongpo.sch.id/repository/buy-robux-free-2021_GM431946152.pdfIn PDF document text
    • http://libsmpn1balongpo.sch.id//repository/how-to-get-robux-for-free-2021_GM431946152.pdfIn PDF document text
    • http://libsmpn1balongpo.sch.id//repository/minecraft-java-hacks_GM479516143.pdfIn PDF document text
    • http://libsmpn1balongpo.sch.id//repository/can-lucky-patcher-hack-coin-master_GM406889139.pdfIn PDF document text
    • http://libsmpn1balongpo.sch.id//repository/free-spins-for-coin-master-2021_GM406889139.pdfIn PDF document text
    • http://libsmpn1balongpo.sch.id//repository/coin-master-daily-link_GM406889139.pdfIn PDF document text
    • http://libsmpn1balongpo.sch.id//repository/free-robux-generator-2021-no-human-verification-or-survey_GM431946152.pdfIn PDF document text
    • http://libsmpn1balongpo.sch.id/repository/free-robux-generator-only-enter-password_GM431946152.pdfIn PDF document text
    • http://libsmpn1balongpo.sch.id//repository/freerobuxhack-us_GM431946152.pdfIn PDF document text
    • http://libsmpn1balongpo.sch.id/repository/roblox-pf-hacks_GM431946152.pdfIn PDF document text
    • http://libsmpn1balongpo.sch.id//repository/how-to-get-free-robux-easy-2021_GM431946152.pdfIn PDF document text
    • http://libsmpn1balongpo.sch.id//repository/free-robux-live_GM431946152.pdfIn PDF document text
    • http://libsmpn1balongpo.sch.id//repository/roblox-free-robux-website_GM431946152.pdfIn PDF document text
    • http://libsmpn1balongpo.sch.id/repository/minecraft-realms-free-trial_GM479516143.pdfIn PDF document text
    • http://libsmpn1balongpo.sch.id/repository/free-card-codes-generator-roblox_GM431946152.pdfIn PDF document text
    • http://libsmpn1balongpo.sch.id/repository/how-to-hack-roblox-jailbreak-2021-on-android_GM431946152.pdfIn PDF document text
    • http://libsmpn1balongpo.sch.id//repository/free-roblox-groups-with-funds_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_off00003092.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x3092 22596 bytes
SHA-256: 6c1419602ca79f5cac5f3f95c8a0dd253d543ead86c45d1ebb6c06b20099ccf0
font_01_sfnt_off00006339.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6339 18168 bytes
SHA-256: 0b2a96827142e2704bc3cf92debab539c74e7a066f59150f0464612b64e0e13f

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