Malicious PDF — malware analysis report

Static analysis result for SHA-256 c4ca8f6f8ae7bc5c…

MALICIOUS

PDF

34.9 KB Created: 2021-07-03 21:59:53 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-29
MD5: c9c108b2220d4f3514159b9234ac1c05 SHA-1: a43ce92ea960f7cbc89578c9b6a11030d40d71f5 SHA-256: c4ca8f6f8ae7bc5c26e84e3b7b093047517b5ef069f9c405a777d0446f8fdcda
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/431946152/roblox-robux-game-hack PDF link annotation
    • https://elearning.min5bandarlampung.sch.id/__statics/gudangsoal/files/roblox-free-tbc-twitter_GM431946152.pdfIn PDF document text
    • https://elearning.min5bandarlampung.sch.id/__statics/gudangsoal/files/free-spins-coin-master-app_GM406889139.pdfIn PDF document text
    • https://elearning.min5bandarlampung.sch.id/__statics/gudangsoal/files/free-robux-no-download_GM431946152.pdfIn PDF document text
    • https://elearning.min5bandarlampung.sch.id/__statics/gudangsoal/files/hack-my-spins-coin-master_GM406889139.pdfIn PDF document text
    • https://elearning.min5bandarlampung.sch.id/__statics/gudangsoal/files/coin-master-free-spin-and-coins-links_GM406889139.pdfIn PDF document text
    • https://elearning.min5bandarlampung.sch.id/__statics/gudangsoal/files/links-for-free-spins-for-coin-master_GM406889139.pdfIn PDF document text
    • https://elearning.min5bandarlampung.sch.id/__statics/gudangsoal/files/dominus-hack-roblox_GM431946152.pdfIn PDF document text
    • https://elearning.min5bandarlampung.sch.id/__statics/gudangsoal/files/free-spins-for-coin-master-game_GM406889139.pdfIn PDF document text
    • https://elearning.min5bandarlampung.sch.id/__statics/gudangsoal/files/free-printable-minecraft-coloring-pages_GM479516143.pdfIn PDF document text
    • https://elearning.min5bandarlampung.sch.id/__statics/gudangsoal/files/coin-and-spin-link_GM406889139.pdfIn PDF document text
    • https://elearning.min5bandarlampung.sch.id/__statics/gudangsoal/files/toolbox-premium-apk_GM479516143.pdfIn PDF document text
    • https://elearning.min5bandarlampung.sch.id/__statics/gudangsoal/files/free-robux-generator-no-human-verification-or-survey-2021_GM431946152.pdfIn PDF document text
    • https://elearning.min5bandarlampung.sch.id/__statics/gudangsoal/files/free-robux-on-phone_GM431946152.pdfIn PDF document text
    • https://elearning.min5bandarlampung.sch.id/__statics/gudangsoal/files/roblox-2021-cheat-engine_GM431946152.pdfIn PDF document text
    • https://elearning.min5bandarlampung.sch.id/__statics/gudangsoal/files/free-robux-earn_GM431946152.pdfIn PDF document text
    • https://elearning.min5bandarlampung.sch.id/__statics/gudangsoal/files/get-gold-coin-master-village-hack_GM406889139.pdfIn PDF document text
    • https://elearning.min5bandarlampung.sch.id/__statics/gudangsoal/files/minecraft-client_GM479516143.pdfIn PDF document text
    • https://elearning.min5bandarlampung.sch.id/__statics/gudangsoal/files/how-to-hack-coin-master-without-root_GM406889139.pdfIn PDF document text
    • https://elearning.min5bandarlampung.sch.id/__statics/gudangsoal/files/free-coins-coin-master-no-human-verification_GM406889139.pdfIn PDF document text
    • https://elearning.min5bandarlampung.sch.id/__statics/gudangsoal/files/spin-link_GM406889139.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_off000031c2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x31C2 22736 bytes
SHA-256: b6392b289b33e309491a83d98d046714e6dea07dc6d3566838136a98975ddf49
font_01_sfnt_off000064a9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x64A9 18628 bytes
SHA-256: 91fe40ca7b1c63e097b3ed98f551f0053b3fa477182f2dddb1f8374deacdf7be

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