Malicious PDF — malware analysis report

Static analysis result for SHA-256 8440fedce9894506…

MALICIOUS

PDF

46.7 KB Created: 2021-06-10 15:16:09 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-13
MD5: be85ee6490d2d88c1538ceed081b88ee SHA-1: ad0eb700307313372346aff57b8941b4e2597fa0 SHA-256: 8440fedce989450610a6086a1af4d74e38c88eca6ca330c0cb8dd641d49b769c
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document employs a lure of free game items and generators to trick users into clicking malicious links. The primary link directs to a known malicious redirector infrastructure, which likely serves as a gateway to further malicious content or exploits. While no scripts were explicitly extracted, the PDF structure and embedded URLs strongly suggest a phishing or scamming attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9832

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.tw/app/431946152/free-roblox-pants-templates-game-hack In PDF document text
    • http://smpn1sda.sch.id/slims/repository/free-coin-master-spins-link_GM406889139.pdfIn PDF document text
    • http://smpn1sda.sch.id/slims/repository/coin-master-hack_GM406889139.pdfIn PDF document text
    • http://smpn1sda.sch.id/slims/repository/real-coin-master-hack_GM406889139.pdfIn PDF document text
    • http://smpn1sda.sch.id/slims/repository/free-robux-really-easy_GM431946152.pdfIn PDF document text
    • http://smpn1sda.sch.id/slims/repository/how-do-you-download-minecraft-for-free_GM479516143.pdfIn PDF document text
    • http://smpn1sda.sch.id/slims/repository/free-roblox-acc_GM431946152.pdfIn PDF document text
    • http://smpn1sda.sch.id/slims/repository/how-to-get-free-robux-2021-no-human-verification_GM431946152.pdfIn PDF document text
    • http://smpn1sda.sch.id/slims/repository/roblox-t-shirt-template-free-shipping_GM431946152.pdfIn PDF document text
    • http://smpn1sda.sch.id/slims/repository/coin-master-free-spins-link-today-facebook_GM406889139.pdfIn PDF document text
    • http://smpn1sda.sch.id/slims/repository/roblox-com-r_GM431946152.pdfIn PDF document text
    • http://smpn1sda.sch.id/slims/repository/coinmaster-spins_GM406889139.pdfIn PDF document text
    • http://smpn1sda.sch.id/slims/repository/minecraft-pe-apk-download_GM479516143.pdfIn PDF document text
    • http://smpn1sda.sch.id/slims/repository/you-promised-my-son-free-robux_GM431946152.pdfIn PDF document text
    • http://smpn1sda.sch.id/slims/repository/how-to-get-free-robux-without-doing-anything_GM431946152.pdfIn PDF document text
    • http://smpn1sda.sch.id/slims/repository/mcpe-free-download_GM479516143.pdfIn PDF document text
    • http://smpn1sda.sch.id/slims/repository/free-robux-generator-2021-no-survey_GM431946152.pdfIn PDF document text
    • http://smpn1sda.sch.id/slims/repository/free-robux-no-human-verification-or-survey-2021_GM431946152.pdfIn PDF document text
    • http://smpn1sda.sch.id/slims/repository/freer-pro-tiktok-fans_GM835599320.pdfIn PDF document text
    • http://smpn1sda.sch.id/slims/repository/hack-para-coin-master-sin-verification_GM406889139.pdfIn PDF document text
    • http://smpn1sda.sch.id/slims/repository/hacks-to-get-free-robux_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_off0000526c.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x526C 27876 bytes
SHA-256: 1761cfe180b382b3c3c9d79a589d6fcb47220e2d49f726d5cc5def8e0031b69d
font_01_sfnt_off00009251.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9251 18872 bytes
SHA-256: 1c4a93c4af9b400e40cb924de81aa6970eb6a5ad64ee0af78e5d476f50d3593e

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