Malicious PDF — malware analysis report

Static analysis result for SHA-256 f5b785a38f412a90…

MALICIOUS

PDF

53.5 KB Created: 2021-06-02 07:42:14 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-01
MD5: dc4c72676eb4075551e125c5d5f2d5bb SHA-1: add7e8761f78fb44db475f4134411e5383ec0716 SHA-256: f5b785a38f412a9066b329d73af3bdb12f3362c39bd379d5b4d4353c184ab1d3
122 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF document was flagged as malicious by an ML classifier. It uses brand-impersonation credential phishing. 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 0.9577

Heuristics 5

  • 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.
  • Brand-impersonation credential phishing lure high SE_BRAND_CREDENTIAL_PHISH
    Document impersonates a well-known consumer brand and uses account-security / verification language ('unusual activity', 'account on hold', 'verify your account') to steer the reader to a credential-harvesting link. Corroborated by: call-to-action link host does not match the impersonated brand: https://netcdn.xyz/app/431946152/how-to-hack-roblox-on-a-phone-game-hack.
  • 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 https://netcdn.xyz/app/431946152/how-to-hack-roblox-on-a-phone-game-hack PDF link annotation
    • https://elearning.alhurriyah1.sch.id/__statics/gudangsoal/files/get-free-robux-com_GM431946152.pdfIn PDF document text
    • https://elearning.alhurriyah1.sch.id/__statics/gudangsoal/files/free-spin-coin-master-2021-link_GM406889139.pdfIn PDF document text
    • https://elearning.alhurriyah1.sch.id/__statics/gudangsoal/files/get-free-robux-2021_GM431946152.pdfIn PDF document text
    • https://elearning.alhurriyah1.sch.id/__statics/gudangsoal/files/coin-master-free-online-game_GM406889139.pdfIn PDF document text
    • https://elearning.alhurriyah1.sch.id/__statics/gudangsoal/files/como-hackear-coin-master-en-espaol_GM406889139.pdfIn PDF document text
    • https://elearning.alhurriyah1.sch.id/__statics/gudangsoal/files/free-robux-com-2021_GM431946152.pdfIn PDF document text
    • https://elearning.alhurriyah1.sch.id/__statics/gudangsoal/files/free-spin-coin-master-game_GM406889139.pdfIn PDF document text
    • https://elearning.alhurriyah1.sch.id/__statics/gudangsoal/files/coin-master-hacks-for-android_GM406889139.pdfIn PDF document text
    • https://elearning.alhurriyah1.sch.id/__statics/gudangsoal/files/picture-roblox_GM431946152.pdfIn PDF document text
    • https://elearning.alhurriyah1.sch.id/__statics/gudangsoal/files/minecraft-online-free-no-download_GM479516143.pdfIn PDF document text
    • https://elearning.alhurriyah1.sch.id/__statics/gudangsoal/files/coin-master-cards-for-free_GM406889139.pdfIn PDF document text
    • https://elearning.alhurriyah1.sch.id/__statics/gudangsoal/files/free-robux-pins_GM431946152.pdfIn PDF document text
    • https://elearning.alhurriyah1.sch.id/__statics/gudangsoal/files/minecraft-for-laptop-free_GM479516143.pdfIn PDF document text
    • https://elearning.alhurriyah1.sch.id/__statics/gudangsoal/files/how-to-get-free-coins-and-free-spins-coin-master_GM406889139.pdfIn PDF document text
    • https://elearning.alhurriyah1.sch.id/__statics/gudangsoal/files/how-to-hack-roblox-to-get-free-robux_GM431946152.pdfIn PDF document text
    • https://elearning.alhurriyah1.sch.id/__statics/gudangsoal/files/coin-master-online-hack-no-human-verification_GM406889139.pdfIn PDF document text
    • https://elearning.alhurriyah1.sch.id/__statics/gudangsoal/files/minecraft-bedrock-edition-hacks_GM479516143.pdfIn PDF document text
    • https://elearning.alhurriyah1.sch.id/__statics/gudangsoal/files/free-spin-in-coin-master_GM406889139.pdfIn PDF document text
    • https://elearning.alhurriyah1.sch.id/__statics/gudangsoal/files/how-to-hack-a-minecraft-server_GM479516143.pdfIn PDF document text
    • https://elearning.alhurriyah1.sch.id/__statics/gudangsoal/files/100-hack-coin-master_GM406889139.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00005646.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5646 27696 bytes
SHA-256: 1eebb67d24dc5d87f3efe4a484a3e3212d1a68536681a71ed07091ef9d0d5f05
font_01_sfnt_off00009502.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9502 2824 bytes
SHA-256: 94c1b019735d7e491765340abe50b2897410e2ec65ecf141c08bd9f2220897c4
font_02_sfnt_off00009eab.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9EAB 6100 bytes
SHA-256: f866077ce59d6ea276f75e4af76daa2aab5f3a1a679df144776123d85664d65c
font_03_sfnt_off0000ad37.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xAD37 18664 bytes
SHA-256: b9ba5c97ec590e118dae4d377b52945502b2a3bbb42763646fe88cd78639c198