Malicious PDF — malware analysis report

Static analysis result for SHA-256 c974662e65f611af…

MALICIOUS

PDF

38.7 KB Created: 2021-05-25 07:34:28 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-13
MD5: 411d1c561f2c7e35cf597f55d29ab1f7 SHA-1: 0b586dccb023cf3e8ec599af22a5eae42514e532 SHA-256: c974662e65f611afadd17cc803efecf407823b227a5a1f7a44f12a1c17bd18dc
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 and lures users with promises of game hacks and generators. The ML classifier also flagged this PDF as malicious. While no scripts were directly extracted, the PDF structure and embedded links suggest an attempt to redirect the user to a malicious site, likely to download a second-stage payload or engage in a scam.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8060

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/479516143/minecraft-account-hacked-game-hack In PDF document text
    • https://bali.kpu.go.id/new/public/ckfinder/userfiles/files/clients-minecraft_GM479516143.pdfIn PDF document text
    • https://bali.kpu.go.id/new/public/ckfinder/userfiles/files/free-spin-generator-for-coin-master_GM406889139.pdfIn PDF document text
    • https://bali.kpu.go.id/new/public/ckfinder/userfiles/files/microsoft-bing-free-robux_GM431946152.pdfIn PDF document text
    • https://bali.kpu.go.id/new/public/ckfinder/userfiles/files/how-to-get-free-roblox-money_GM431946152.pdfIn PDF document text
    • https://bali.kpu.go.id/new/public/ckfinder/userfiles/files/free-tiktok-likes-and-followers_GM835599320.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Related samples 8

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

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_002_off00003372.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x3372 25348 bytes
SHA-256: 1ffd9f3bc461f98167ecaf959b5fee89ee97b1cae50d88ab849e495d1e9f6dfe
font_01_sfnt_off00006c71.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6C71 2840 bytes
SHA-256: 3fb127b764b9d10f5525bc4de5ec8316de704409ccb0cf21cff3ad8a30d11676
font_02_sfnt_off00007622.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7622 18192 bytes
SHA-256: 008244ed49e44a6e3f1c26538d212edbe60ea445ab612c7727f56c46dc3d0edb

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