Malicious PDF — malware analysis report

Static analysis result for SHA-256 e79f54b073ad640e…

MALICIOUS

PDF

38.0 KB Created: 2021-05-22 20:55:31 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-12
MD5: f1f5653ee14c05256d7af2bf07f6c2e3 SHA-1: 5c60ea07f5816131607c52c9344a1bf8af845759 SHA-256: e79f54b073ad640e93dabb054d69f38ef2f445a990817f5f3cd7ff56e439f6f6
160 Risk Score

Malware Insights

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

The PDF contains embedded links that redirect to a malicious generator site, masquerading as a 'free generator / game hack'. The document body explicitly mentions 'Get Free Tiktok Followers' and includes a call to action to access a 'TIKTOK GENERATOR'. This indicates a social engineering lure designed to lead users to potentially malicious content or further exploits.

Machine Learning

  • Nyx PDF Classifier malicious score 0.7095

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 https://netcdn.xyz/app/835599320/get-free-tiktok-followers-game-hack In PDF document text
    • https://elearning.mtsnmodelpalopo.sch.id/__statics/gudangsoal/files/free-robux-without-human-verification_GM431946152.pdfIn PDF document text
    • https://elearning.mtsnmodelpalopo.sch.id/__statics/gudangsoal/files/coin-master-free-spins-for-iphone_GM406889139.pdfIn PDF document text
    • https://elearning.mtsnmodelpalopo.sch.id/__statics/gudangsoal/files/www-roblox-robux_GM431946152.pdfIn PDF document text
    • https://elearning.mtsnmodelpalopo.sch.id/__statics/gudangsoal/files/coin-master-hack-download-2021_GM406889139.pdfIn PDF document text
    • https://elearning.mtsnmodelpalopo.sch.id/__statics/gudangsoal/files/hack-coin-master-apk_GM406889139.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_002_off00002fa4.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x2FA4 25908 bytes
SHA-256: 336ee4a0fa40abd2310de40eb4228b19ad97393b310152d1dcf6a14821a1de1f
font_01_sfnt_off00006a69.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6A69 3056 bytes
SHA-256: 0432d15cacd13b5a5bf0bf04f3d71617a106c5603bf9a3bf3700862b55413bdd
font_02_sfnt_off000074e0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x74E0 17692 bytes
SHA-256: 02c3cedea4a2807b323b614e41e6797ad921ddb65350057b59541dca36dbbb9a

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