Malicious PDF — malware analysis report

Static analysis result for SHA-256 d1160f96e816e428…

MALICIOUS

PDF

33.6 KB Created: 2021-07-06 02:21:05 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-16
MD5: c8029f0830f72d02f4b67a42bc752fe3 SHA-1: 2536e3574757438518bcb54bfe1f018bf478b4c0 SHA-256: d1160f96e816e428732a9da0a45c18a5940ffea975985ec6458dee3edfdc8112
160 Risk Score

Malware Insights

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

The PDF contains multiple links to known malicious redirectors, specifically advertising 'free generator / game hack' content. The ML classifier strongly flagged this PDF as malicious. The embedded URLs and the document body content indicate a lure for free in-game currency or account-related services, which is a common phishing or scam tactic.

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/835599320/i-want-to-grow-my-account-tiktok-free-game-hack In PDF document text
    • http://library.smpn2-byl.sch.id//repository/heroes-online-roblox_GM431946152.pdfIn PDF document text
    • http://library.smpn2-byl.sch.id/repository/free-robux-scams_GM431946152.pdfIn PDF document text
    • http://library.smpn2-byl.sch.id//repository/pubg-uc-kuwait_GM1330123889.pdfIn PDF document text
    • http://library.smpn2-byl.sch.id//repository/daily-coin-master-free-spins_GM406889139.pdfIn PDF document text
    • http://library.smpn2-byl.sch.id//repository/coin-master-daily-rewards-link_GM406889139.pdfIn PDF document text
    • http://library.smpn2-byl.sch.id/repository/backpaking-roblox-free-generator_GM431946152.pdfIn PDF document text
    • http://library.smpn2-byl.sch.id//repository/coin-master-free-spins-link-today-new-2021_GM406889139.pdfIn PDF document text
    • http://library.smpn2-byl.sch.id/repository/how-to-get-free-items-on-roblox-without-robux_GM431946152.pdfIn PDF document text
    • http://library.smpn2-byl.sch.id//repository/robux-free-promo-codes_GM431946152.pdfIn PDF document text
    • http://library.smpn2-byl.sch.id//repository/coin-master-free-link-today_GM406889139.pdfIn PDF document text
    • http://library.smpn2-byl.sch.id//repository/how-to-get-free-robux-for-real_GM431946152.pdfIn PDF document text
    • http://library.smpn2-byl.sch.id//repository/free-robux-generator-com-roblox-hack_GM431946152.pdfIn PDF document text
    • http://library.smpn2-byl.sch.id//repository/free-robux-no-verification-required_GM431946152.pdfIn PDF document text
    • http://library.smpn2-byl.sch.id//repository/roblox-avatar-maker-free_GM431946152.pdfIn PDF document text
    • http://library.smpn2-byl.sch.id/repository/games-on-roblox-that-you-can-play-music-free_GM431946152.pdfIn PDF document text
    • http://library.smpn2-byl.sch.id//repository/robux-hack-generator_GM431946152.pdfIn PDF document text
    • http://library.smpn2-byl.sch.id//repository/minecraft-redeem-code-free_GM479516143.pdfIn PDF document text
    • http://library.smpn2-byl.sch.id//repository/how-to-buy-robux-for-free_GM431946152.pdfIn PDF document text
    • http://library.smpn2-byl.sch.id//repository/pubg-uc-icon_GM1330123889.pdfIn PDF document text
    • http://library.smpn2-byl.sch.id/repository/how-to-make-your-game-in-roblox-hack-proof_GM431946152.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Related samples 7

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00002f4f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2F4F 21692 bytes
SHA-256: 5f6ed7af2c699e6aa810cccc64206127ecb00dc5b12d4df3463b224d80126fe6
font_01_sfnt_off00005ee4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5EE4 18852 bytes
SHA-256: afd4740976691aee688cb61da886b600e3d8d1e6aa085b2f5949a759eb1851db

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