Malicious PDF — malware analysis report

Static analysis result for SHA-256 58b5f220a8d9eda8…

MALICIOUS

PDF

34.3 KB Created: 2021-07-03 16:03:22 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-15
MD5: b78d7be417fcd77f0bf927461ed8a42b SHA-1: bc7cad2d105b064527b96b5cb3308cc1f4ebc7ee SHA-256: 58b5f220a8d9eda870ecdab6a297878c93636b2369e6e986b68247c6e4fad3b2
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple links to a known malicious redirector, disguised as offers for free Robux and game hacks. The heuristic firings indicate that the document is designed to lure users into clicking these links, which likely leads to a second-stage payload download or further malicious redirection. No scripts were extracted, but the embedded URLs and the nature of the lure strongly suggest a phishing or malware distribution attempt.

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.tw/app/431946152/free-robux-promo-codes-game-hack In PDF document text
    • http://learning.mtsn6kotapdg.sch.id/__statics/gudangsoal/files/free-roblox-redeem-codes-that-haven-39_GM431946152.pdfIn PDF document text
    • http://learning.mtsn6kotapdg.sch.id/__statics/gudangsoal/files/free-roam-open-world-roblox-games_GM431946152.pdfIn PDF document text
    • http://learning.mtsn6kotapdg.sch.id/__statics/gudangsoal/files/coin-master-hack-https-coinms-net_GM406889139.pdfIn PDF document text
    • http://learning.mtsn6kotapdg.sch.id/__statics/gudangsoal/files/free-robux-no-offers_GM431946152.pdfIn PDF document text
    • http://learning.mtsn6kotapdg.sch.id/__statics/gudangsoal/files/free-spin-coin-master-2021-link_GM406889139.pdfIn PDF document text
    • http://learning.mtsn6kotapdg.sch.id/__statics/gudangsoal/files/free-stuff-on-roblox-pastebin_GM431946152.pdfIn PDF document text
    • http://learning.mtsn6kotapdg.sch.id/__statics/gudangsoal/files/how-to-get-free-robux-without-verifying_GM431946152.pdfIn PDF document text
    • http://learning.mtsn6kotapdg.sch.id/__statics/gudangsoal/files/hack-roblox-pro_GM431946152.pdfIn PDF document text
    • http://learning.mtsn6kotapdg.sch.id/__statics/gudangsoal/files/is-there-any-working-robux-hacks-roblox_GM431946152.pdfIn PDF document text
    • http://learning.mtsn6kotapdg.sch.id/__statics/gudangsoal/files/free-robux-download-apps_GM431946152.pdfIn PDF document text
    • http://learning.mtsn6kotapdg.sch.id/__statics/gudangsoal/files/fly-hacks-roblox-2021_GM431946152.pdfIn PDF document text
    • http://learning.mtsn6kotapdg.sch.id/__statics/gudangsoal/files/roblox-robux-hack-134_GM431946152.pdfIn PDF document text
    • http://learning.mtsn6kotapdg.sch.id/__statics/gudangsoal/files/how-to-get-free-outfits-on-roblox_GM431946152.pdfIn PDF document text
    • http://learning.mtsn6kotapdg.sch.id/__statics/gudangsoal/files/how-do-you-get-free-robux-on-pc_GM431946152.pdfIn PDF document text
    • http://learning.mtsn6kotapdg.sch.id/__statics/gudangsoal/files/free-roblox-fedora_GM431946152.pdfIn PDF document text
    • http://learning.mtsn6kotapdg.sch.id/__statics/gudangsoal/files/best-free-minecraft-server-hosting_GM479516143.pdfIn PDF document text
    • http://learning.mtsn6kotapdg.sch.id/__statics/gudangsoal/files/8-bit-speed-hack-roblox_GM431946152.pdfIn PDF document text
    • http://learning.mtsn6kotapdg.sch.id/__statics/gudangsoal/files/free-tiktok-followers-no-downloads_GM835599320.pdfIn PDF document text
    • http://learning.mtsn6kotapdg.sch.id/__statics/gudangsoal/files/free-college-textbooks-tiktok_GM835599320.pdfIn PDF document text
    • http://learning.mtsn6kotapdg.sch.id/__statics/gudangsoal/files/try-minecraft-free_GM479516143.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_off000030a4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x30A4 21780 bytes
SHA-256: 5291992e86ed7384143cd358630265107040a41c0d8dcbed7c5993539b43f074
font_01_sfnt_off00006043.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6043 19304 bytes
SHA-256: b8217d46ff736f49d3e7fbbf4ad016b5c147b05ee0ff1e8951011688dc8d1bae

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