Malicious PDF — malware analysis report

Static analysis result for SHA-256 7138942477e4e7e2…

MALICIOUS

PDF

34.5 KB Created: 2021-06-25 23:36:18 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-15
MD5: d588ed3c40731c0c6263d748e010402b SHA-1: 9478229e78f2df024a79a7d4d1cdcdcd549a647b SHA-256: 7138942477e4e7e2dceba7e0df3c4ea0e2d50ad97c227aa379d0f5b9caf83a67
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a critical heuristic firing for a game hack redirect lure, pointing to malicious infrastructure. The document body also contains the same URL, reinforcing the lure. The ML classifier strongly flagged this PDF as malicious. No scripts were extracted, but the primary attack pattern involves directing the user to a malicious URL under the guise of providing game hacks.

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.co/app/431946152/how-to-make-a-hack-for-roblox-game-hack In PDF document text
    • http://library.apsidoarjo.ac.id/repository/coin-master-heaven-free-daily-spins_GM406889139.pdfIn PDF document text
    • http://library.apsidoarjo.ac.id/repository/pubg-uc-with-jazz-cash_GM1330123889.pdfIn PDF document text
    • http://library.apsidoarjo.ac.id/repository/site-robux-free_GM431946152.pdfIn PDF document text
    • http://library.apsidoarjo.ac.id/repository/free-empty-roblox-accounts_GM431946152.pdfIn PDF document text
    • http://library.apsidoarjo.ac.id/repository/roblox-speed-hack-cheat-engine-2021_GM431946152.pdfIn PDF document text
    • http://library.apsidoarjo.ac.id/repository/free-minecraft-alts_GM479516143.pdfIn PDF document text
    • http://library.apsidoarjo.ac.id/repository/elysian-hack-roblox_GM431946152.pdfIn PDF document text
    • http://library.apsidoarjo.ac.id/repository/roblox-parkour-hack-2021-script_GM431946152.pdfIn PDF document text
    • http://library.apsidoarjo.ac.id/repository/can-you-really-hack-coin-master_GM406889139.pdfIn PDF document text
    • http://library.apsidoarjo.ac.id/repository/how-to-make-clothes-on-roblox-free_GM431946152.pdfIn PDF document text
    • http://library.apsidoarjo.ac.id//repository/coin-master-deals_GM406889139.pdfIn PDF document text
    • http://library.apsidoarjo.ac.id/repository/how-to-hack-roblox-accounts-2021_GM431946152.pdfIn PDF document text
    • http://library.apsidoarjo.ac.id//repository/coinmaster-gps-user-review-coinmaster-coin-master-hack-pagedemo-index_GM406889139.pdfIn PDF document text
    • http://library.apsidoarjo.ac.id//repository/free-robux-gift-card-generator_GM431946152.pdfIn PDF document text
    • http://library.apsidoarjo.ac.id/repository/how-to-download-minecraft-java-edition-for-free_GM479516143.pdfIn PDF document text
    • http://library.apsidoarjo.ac.id/repository/tiktok-free-liker-apk-download_GM835599320.pdfIn PDF document text
    • http://library.apsidoarjo.ac.id/repository/how-to-download-hacks-for-roblox_GM431946152.pdfIn PDF document text
    • http://library.apsidoarjo.ac.id/repository/xray-mod-minecraft-114_GM479516143.pdfIn PDF document text
    • http://library.apsidoarjo.ac.id//repository/coin-master-how-to-get-free-pet-food_GM406889139.pdfIn PDF document text
    • http://library.apsidoarjo.ac.id/repository/robux-command-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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00003075.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x3075 22136 bytes
SHA-256: 1cf4606fa519cde00160ce8b5c5ab2d04a3290056f52d5b892766f979f2dcacb
font_01_sfnt_off00006188.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6188 19180 bytes
SHA-256: 525c4a70ead5bdbdfad20d762023757a88ced6904dc93a92689df43538960f28

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