Malicious PDF — malware analysis report

Static analysis result for SHA-256 f391f9243f7ad8f9…

MALICIOUS

PDF

33.4 KB Created: 2021-07-03 12:31:27 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-07
MD5: 055abe3f5e8d22391a8eccef406f7f6c SHA-1: eef851ee0e7fce5f53a4b98d5df31712e8bac5a1 SHA-256: f391f9243f7ad8f9ee7ca5469ef18ee87b96d1fa3bc553655f82d4d0b8218952
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains embedded links and lures related to 'free Robux' and game hacks, directing users to a suspicious URL. The ML classifier also flagged this PDF as malicious. The primary attack pattern involves social engineering through a fake offer to entice users to click the malicious link, likely leading to a further stage of compromise.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9824

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/431946152/free-robux-codes-2021-game-hack PDF link annotation
    • https://elearning.mtsn1bandarlampung.sch.id/__statics/gudangsoal/files/free-roblox-groups_GM431946152.pdfIn PDF document text
    • https://elearning.mtsn1bandarlampung.sch.id/__statics/gudangsoal/files/roblox-hack-download-pc_GM431946152.pdfIn PDF document text
    • https://elearning.mtsn1bandarlampung.sch.id/__statics/gudangsoal/files/roblox-mad-city-hack-pastebin_GM431946152.pdfIn PDF document text
    • https://elearning.mtsn1bandarlampung.sch.id/__statics/gudangsoal/files/robux-free-com_GM431946152.pdfIn PDF document text
    • https://elearning.mtsn1bandarlampung.sch.id/__statics/gudangsoal/files/minecraft-name-tag-hacks_GM479516143.pdfIn PDF document text
    • https://elearning.mtsn1bandarlampung.sch.id/__statics/gudangsoal/files/free-coin-master-spins-blog_GM406889139.pdfIn PDF document text
    • https://elearning.mtsn1bandarlampung.sch.id/__statics/gudangsoal/files/how-to-get-free-robux-instantly_GM431946152.pdfIn PDF document text
    • https://elearning.mtsn1bandarlampung.sch.id/__statics/gudangsoal/files/free-spins-coin-master-app_GM406889139.pdfIn PDF document text
    • https://elearning.mtsn1bandarlampung.sch.id/__statics/gudangsoal/files/free-adidas-roblox_GM431946152.pdfIn PDF document text
    • https://elearning.mtsn1bandarlampung.sch.id/__statics/gudangsoal/files/feb-23-2021-free-coin-master-spins_GM406889139.pdfIn PDF document text
    • https://elearning.mtsn1bandarlampung.sch.id/__statics/gudangsoal/files/coin-master-hacks-2021_GM406889139.pdfIn PDF document text
    • https://elearning.mtsn1bandarlampung.sch.id/__statics/gudangsoal/files/boxing-simulator-roblox-hack_GM431946152.pdfIn PDF document text
    • https://elearning.mtsn1bandarlampung.sch.id/__statics/gudangsoal/files/free-tiktok-followers-without-verification_GM835599320.pdfIn PDF document text
    • https://elearning.mtsn1bandarlampung.sch.id/__statics/gudangsoal/files/free-girl-hair-roblox_GM431946152.pdfIn PDF document text
    • https://elearning.mtsn1bandarlampung.sch.id/__statics/gudangsoal/files/get-free-cards-for-coin-master_GM406889139.pdfIn PDF document text
    • https://elearning.mtsn1bandarlampung.sch.id/__statics/gudangsoal/files/roblox-redeem-card-codes-free_GM431946152.pdfIn PDF document text
    • https://elearning.mtsn1bandarlampung.sch.id/__statics/gudangsoal/files/how-to-get-free-robux-on-roblox_GM431946152.pdfIn PDF document text
    • https://elearning.mtsn1bandarlampung.sch.id/__statics/gudangsoal/files/red-valk-roblox-free_GM431946152.pdfIn PDF document text
    • https://elearning.mtsn1bandarlampung.sch.id/__statics/gudangsoal/files/daily-free-spins-coin-master-2021_GM406889139.pdfIn PDF document text
    • https://elearning.mtsn1bandarlampung.sch.id/__statics/gudangsoal/files/tiktok-for-free-movies_GM835599320.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00002c07.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2C07 22020 bytes
SHA-256: ef307734c956d78525e5bc7c90094a20b93fb22797b5aab2b0b96175a9af774e
font_01_sfnt_off00005cc4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5CC4 19292 bytes
SHA-256: a06e109f4742255b3e3bb25118cfd4c6c94882922bdfaa475a115917b157a644

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