Malicious PDF — malware analysis report

Static analysis result for SHA-256 8842649275fe0915…

MALICIOUS

PDF

48.3 KB Created: 2021-06-10 21:26:18 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-13
MD5: a27563968ec5a416a8944dd0c8495806 SHA-1: 6a171b8ce7b583b4cf51ae093608bb1253a1e682 SHA-256: 8842649275fe091585c03676082908b9e9d968f639524c6e132d1d3624ddcbf9
200 Risk Score

Malware Insights

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

This PDF document employs a fake CAPTCHA lure to trick users into clicking a malicious link, specifically promoting 'free generator / game hack' content. The embedded URL leads to a known malicious redirector, likely intended to deliver a second-stage payload or phish for credentials. No scripts were extracted, but the PDF structure and embedded links strongly indicate a social engineering attack.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9796

Heuristics 5

  • 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.
  • Fake CAPTCHA / human verification prompt high SE_FAKE_CAPTCHA
    Document displays a fake CAPTCHA or human-verification prompt — used to trick users into running commands or pressing keyboard shortcuts
  • 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.tw/app/431946152/how-to-get-free-robux-2021-pc-game-hack In PDF document text
    • http://pustaka.manajemen.fekon.unand.ac.id/repository/hacks-roblox-royall-jely_GM431946152.pdfIn PDF document text
    • http://pustaka.manajemen.fekon.unand.ac.id/repository/lazyblox-com-free-robux_GM431946152.pdfIn PDF document text
    • http://pustaka.manajemen.fekon.unand.ac.id/repository/tiktok-for-free_GM835599320.pdfIn PDF document text
    • http://pustaka.manajemen.fekon.unand.ac.id/repository/microsoft-free-robux_GM431946152.pdfIn PDF document text
    • http://pustaka.manajemen.fekon.unand.ac.id/repository/free-robux-generator-no-human-verification-2021_GM431946152.pdfIn PDF document text
    • http://pustaka.manajemen.fekon.unand.ac.id/repository/free-robux-com-real_GM431946152.pdfIn PDF document text
    • http://pustaka.manajemen.fekon.unand.ac.id/repository/free-robux-no-verify_GM431946152.pdfIn PDF document text
    • http://pustaka.manajemen.fekon.unand.ac.id/repository/how-to-get-minecraft-coins-for-free_GM479516143.pdfIn PDF document text
    • http://pustaka.manajemen.fekon.unand.ac.id/repository/master-coin-free-link_GM406889139.pdfIn PDF document text
    • http://pustaka.manajemen.fekon.unand.ac.id/repository/roblox-free-clothes-hack-2021_GM431946152.pdfIn PDF document text
    • http://pustaka.manajemen.fekon.unand.ac.id/repository/robux-hack-gratuits-apk-mods_GM431946152.pdfIn PDF document text
    • http://pustaka.manajemen.fekon.unand.ac.id/repository/free-unused-roblox-card-codes-2021_GM431946152.pdfIn PDF document text
    • http://pustaka.manajemen.fekon.unand.ac.id/repository/free-robux-website_GM431946152.pdfIn PDF document text
    • http://pustaka.manajemen.fekon.unand.ac.id/repository/free-robux-generator-no-survey-no-download-no-human-verification_GM431946152.pdfIn PDF document text
    • http://pustaka.manajemen.fekon.unand.ac.id/repository/royale-high-roblox-outfit-hacks_GM431946152.pdfIn PDF document text
    • http://pustaka.manajemen.fekon.unand.ac.id/repository/free-robux-hack-no-human-verification-and-no-download_GM431946152.pdfIn PDF document text
    • http://pustaka.manajemen.fekon.unand.ac.id/repository/ajc-tech-free-roblox_GM431946152.pdfIn PDF document text
    • http://pustaka.manajemen.fekon.unand.ac.id/repository/roblox-free-login_GM431946152.pdfIn PDF document text
    • http://pustaka.manajemen.fekon.unand.ac.id/repository/free-coin-master-cards_GM406889139.pdfIn PDF document text
    • http://pustaka.manajemen.fekon.unand.ac.id/repository/mobihack-roblox-hack_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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_004_off00005498.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x5498 26224 bytes
SHA-256: 128ad3a34c94e832ce68481907797841dd19a4459a6f7f84dd41f1c2339b93b2
font_01_sfnt_off00008e84.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8E84 2880 bytes
SHA-256: 10d025f04f706eb71cdda4f99784df1b9ccb52e48080e43095e0398eaef6f132
font_02_sfnt_off0000986f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x986F 18836 bytes
SHA-256: 6cc091809f3d93526c461b7869a49f73cfaf0c1f7200f06bd27040e5131768d4

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