Malicious PDF — malware analysis report

Static analysis result for SHA-256 51faa51e91898d22…

MALICIOUS

PDF

34.1 KB Created: 2021-07-03 19:59:35 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-18
MD5: f43b5498dab4f01981da70cec4a8b9a3 SHA-1: a9aad20e3c55072b8e531c1e29f0bf90847602f8 SHA-256: 51faa51e91898d224872a221ff02d3797acd547aa877b9ec7d9fd60a019204d1
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document was flagged as malicious by an ML classifier. The file routes users through malicious redirector infrastructure and presents a deceptive download button. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

Heuristics 4

  • PDF links to a 'free generator / game hack' redirector high 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.
  • 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
  • External URI info PDF_URI
    PDF contains an external URL action
  • 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/479516143/wurst-mc-game-hack PDF link annotation
    • https://elearningmtsn1tanggamus.sch.id/__statics/gudangsoal/files/coin-master-daily-free-spin-app_GM406889139.pdfIn PDF document text
    • https://www.elearningmtsn1tanggamus.sch.id/__statics/gudangsoal/files/coin-master-daily-free-spins-2021_GM406889139.pdfIn PDF document text
    • https://www.elearningmtsn1tanggamus.sch.id/__statics/gudangsoal/files/free-robux-codes-twitter_GM431946152.pdfIn PDF document text
    • https://www.elearningmtsn1tanggamus.sch.id/__statics/gudangsoal/files/block-best-robux_GM431946152.pdfIn PDF document text
    • https://elearningmtsn1tanggamus.sch.id/__statics/gudangsoal/files/minecraft-ps4-free_GM479516143.pdfIn PDF document text
    • https://www.elearningmtsn1tanggamus.sch.id/__statics/gudangsoal/files/roblox-prisoner-life-speed-hack_GM431946152.pdfIn PDF document text
    • https://www.elearningmtsn1tanggamus.sch.id/__statics/gudangsoal/files/free-coin-master-spins_GM406889139.pdfIn PDF document text
    • https://www.elearningmtsn1tanggamus.sch.id/__statics/gudangsoal/files/what-is-coin-master_GM406889139.pdfIn PDF document text
    • https://www.elearningmtsn1tanggamus.sch.id/__statics/gudangsoal/files/free-red-scarf-roblox_GM431946152.pdfIn PDF document text
    • https://www.elearningmtsn1tanggamus.sch.id/__statics/gudangsoal/files/robux-gainer_GM431946152.pdfIn PDF document text
    • https://elearningmtsn1tanggamus.sch.id/__statics/gudangsoal/files/free-robux-hack-club_GM431946152.pdfIn PDF document text
    • https://elearningmtsn1tanggamus.sch.id/__statics/gudangsoal/files/how-to-make-a-minecraft-server-for-free-java_GM479516143.pdfIn PDF document text
    • https://elearningmtsn1tanggamus.sch.id/__statics/gudangsoal/files/free-robux-and-tix-generator-2021-no-download_GM431946152.pdfIn PDF document text
    • https://www.elearningmtsn1tanggamus.sch.id/__statics/gudangsoal/files/free-online-games-like-minecraft_GM479516143.pdfIn PDF document text
    • https://elearningmtsn1tanggamus.sch.id/__statics/gudangsoal/files/rbx-roblox-robux_GM431946152.pdfIn PDF document text
    • https://elearningmtsn1tanggamus.sch.id/__statics/gudangsoal/files/roblox-tower-defense-hacks_GM431946152.pdfIn PDF document text
    • https://elearningmtsn1tanggamus.sch.id/__statics/gudangsoal/files/roblox-free-club_GM431946152.pdfIn PDF document text
    • https://elearningmtsn1tanggamus.sch.id/__statics/gudangsoal/files/coin-master-free-coins-generator_GM406889139.pdfIn PDF document text
    • https://elearningmtsn1tanggamus.sch.id/__statics/gudangsoal/files/coin-master-cheats-free_GM406889139.pdfIn PDF document text
    • https://www.elearningmtsn1tanggamus.sch.id/__statics/gudangsoal/files/robux-hack-no-human-verification-2021_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
font_00_sfnt_off0000337a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x337A 21972 bytes
SHA-256: 12f96e3d0f757f7d2a3c1e10e8bf92a39b5a0170d8d73a56a8670c6543c2c0fd
font_01_sfnt_off00006362.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6362 18072 bytes
SHA-256: f2e49008d51297eeb1fc8be2ba2f15def21feb23153b94f58eb81aee8282afc5

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