Malicious PDF — malware analysis report

Static analysis result for SHA-256 c15710d8add632bf…

MALICIOUS

PDF

34.2 KB Created: 2021-07-06 08:51:38 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-15
MD5: 21c12afd60110597a1b6419f43b804f2 SHA-1: b36f548dfe6b2a9f7a544f7372075e4c3d957b5b SHA-256: c15710d8add632bfa73623dbc9de56b247e71e69fb7c7d54eeb832242ee57870
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple links to redirector infrastructure, masquerading as game hacks and generators. The primary lure is for 'Coin Master' free spins, directing users to http://netcdn.tw/app/406889139/how-do-i-get-free-spins-in-coin-master-game-hack. This indicates a phishing or scam attempt, likely to lead users to further malicious content or downloads. No scripts were extracted, but the embedded URLs and lure text strongly suggest a social engineering attack.

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/how-do-i-get-free-spins-in-coin-master-game-hack In PDF document text
    • http://opac.salatigakota.go.id/slims7//repository/free-links-coin-master_GM406889139.pdfIn PDF document text
    • http://opac.salatigakota.go.id/slims7/repository/free-roblox-hacks-for-jailbreak-2021_GM431946152.pdfIn PDF document text
    • http://opac.salatigakota.go.id/slims7//repository/robux-hacks-2021_GM431946152.pdfIn PDF document text
    • http://opac.salatigakota.go.id/slims7//repository/free-role-in-coin-master_GM406889139.pdfIn PDF document text
    • http://opac.salatigakota.go.id/slims7/repository/how-to-get-free-robux-on-roblox-in-2021-pyckel_GM431946152.pdfIn PDF document text
    • http://opac.salatigakota.go.id/slims7/repository/roblox-high-school-cheats-horror_GM431946152.pdfIn PDF document text
    • http://opac.salatigakota.go.id/slims7//repository/free-tiktok-foryoupage_GM835599320.pdfIn PDF document text
    • http://opac.salatigakota.go.id/slims7/repository/me-hackearon-roblox_GM431946152.pdfIn PDF document text
    • http://opac.salatigakota.go.id/slims7//repository/coin-master-free-spins-and-coins-2021_GM406889139.pdfIn PDF document text
    • http://opac.salatigakota.go.id/slims7//repository/free-old-roblox-accounts_GM431946152.pdfIn PDF document text
    • http://opac.salatigakota.go.id/slims7/repository/como-hackear-roblox-cuentas_GM431946152.pdfIn PDF document text
    • http://opac.salatigakota.go.id/slims7/repository/how-to-make-a-roblox-hack-in-visual-studio_GM431946152.pdfIn PDF document text
    • http://opac.salatigakota.go.id/slims7/repository/free-geaar-roblox_GM431946152.pdfIn PDF document text
    • http://opac.salatigakota.go.id/slims7//repository/free-spins-coin-master-links-blogspot_GM406889139.pdfIn PDF document text
    • http://opac.salatigakota.go.id/slims7//repository/coin-master-daily-free-spins-25_GM406889139.pdfIn PDF document text
    • http://opac.salatigakota.go.id/slims7/repository/roblox-walls-hack_GM431946152.pdfIn PDF document text
    • http://opac.salatigakota.go.id/slims7/repository/free-roblox-pikachu_GM431946152.pdfIn PDF document text
    • http://opac.salatigakota.go.id/slims7/repository/roblox-free-admin-powers-game_GM431946152.pdfIn PDF document text
    • http://opac.salatigakota.go.id/slims7/repository/ar-hacks-roblox_GM431946152.pdfIn PDF document text
    • http://opac.salatigakota.go.id/slims7/repository/roblox-and-hacking_GM431946152.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_002_off000030b1.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x30B1 22336 bytes
SHA-256: 7043e53765fc2809afe898fe988e2eaa3734807d257463e577449983bc3353a4
font_01_sfnt_off00006278.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6278 18508 bytes
SHA-256: 5fa4adbbb2c865a19aa6c2d7661c2270d24b48d73078d2e2d8c4fb61005cd4a1

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