Malicious PDF — malware analysis report

Static analysis result for SHA-256 180b816fc684a138…

MALICIOUS

PDF

46.4 KB Created: 2021-06-07 10:05:35 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-15
MD5: 495c82bd934ba89582e6cca8eed7ba94 SHA-1: 0b5ffb9e2cccaaacf0075013b58d0e59292f9f1e SHA-256: 180b816fc684a1388c6ddc7691dd9cff7630cfe9dbd82f501816067267d517ba
200 Risk Score

Malware Insights

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

The PDF contains a link disguised as a game hack, which redirects to known malicious infrastructure. This infrastructure hosts further PDF documents, suggesting a multi-stage lure designed to trick users into downloading potentially malicious content. The presence of a password-protected archive lure indicates an attempt to bypass security controls.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9832

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.
  • Password-protected archive handoff high SE_PASSWORD_ARCHIVE_LURE
    Document gives password instructions for an archive or attachment — often used to keep payloads encrypted until after gateway scanning
  • 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/roblox-cheat-codes-for-robux-2021-on-tablet-game-hack In PDF document text
    • https://kierowcyhgv.uk/images/minecraft-free-download-mac_GM479516143.pdfIn PDF document text
    • https://kierowcyhgv.uk/images/free-spin-in-coin-master_GM406889139.pdfIn PDF document text
    • https://kierowcyhgv.uk/images/today-free-spin-coin-master_GM406889139.pdfIn PDF document text
    • https://kierowcyhgv.uk/images/minecraft-aimbot_GM479516143.pdfIn PDF document text
    • https://kierowcyhgv.uk/images/blox-fish-free-robux_GM431946152.pdfIn PDF document text
    • https://kierowcyhgv.uk/images/free-robux-no-verification-2021_GM431946152.pdfIn PDF document text
    • https://kierowcyhgv.uk/images/free-tiktok-likes-and-followers_GM835599320.pdfIn PDF document text
    • https://kierowcyhgv.uk/images/free-robux-microsoft_GM431946152.pdfIn PDF document text
    • https://kierowcyhgv.uk/images/is-pokemon-go-free-on-ipad_GM1094591345.pdfIn PDF document text
    • https://kierowcyhgv.uk/images/free-minecraft-server-hosting_GM479516143.pdfIn PDF document text
    • https://kierowcyhgv.uk/images/rblx-city-free-robux_GM431946152.pdfIn PDF document text
    • https://kierowcyhgv.uk/images/tiktok-minecraft-hacks_GM479516143.pdfIn PDF document text
    • https://kierowcyhgv.uk/images/coin-master-free-spins-activegamer_GM406889139.pdfIn PDF document text
    • https://kierowcyhgv.uk/images/coin-spin-link_GM406889139.pdfIn PDF document text
    • https://kierowcyhgv.uk/images/roblox-earn_GM431946152.pdfIn PDF document text
    • https://kierowcyhgv.uk/images/free-roblox-groups-with-funds_GM431946152.pdfIn PDF document text
    • https://kierowcyhgv.uk/images/how-to-get-free-robux-without-doing-anything_GM431946152.pdfIn PDF document text
    • https://kierowcyhgv.uk/images/roblox-com-redeem_GM431946152.pdfIn PDF document text
    • https://kierowcyhgv.uk/images/how-to-get-free-robux-on-phone-2021_GM431946152.pdfIn PDF document text
    • https://kierowcyhgv.uk/images/free-robux-no-verification-needed_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_004_off00005208.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x5208 26612 bytes
SHA-256: ee316fed9398205dff860c514a7c5df448be96576512339dab96a7ce56b6289b
font_01_sfnt_off00008ffc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8FFC 19160 bytes
SHA-256: 2059b9f416bf133ed9e73edf2dfbfdeede621ccd8e384452629d64536923a541

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