Malicious PDF — malware analysis report

Static analysis result for SHA-256 ba507fab7e0d7a8c…

MALICIOUS

PDF

45.2 KB Created: 2021-05-11 00:32:29 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-01
MD5: 91684988bdb7f2b56c224d9f78033a2d SHA-1: c6d0bf00880298e65ab51a2dfb53b30eb1e4f100 SHA-256: ba507fab7e0d7a8c8382fd449efce8905fc30ca37204e8e5583eecb6f57a5f43
142 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 and a callback-phone (TOAD) lure. 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 0.9621

Heuristics 6

  • 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/479516143/minecraft-pe-server-hosting-free-game-hack.
  • Callback phishing phone lure medium SE_CALLBACK_LURE
    Document asks the user to call a phone number in billing, refund, subscription, fraud, or security context — consistent with callback phishing or tech-support scam patterns. Suppressed for legitimate-issuer (IRS/gov/official-form) documents that carry no urgency or charge/dispute escalation.
  • 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/479516143/minecraft-pe-server-hosting-free-game-hack PDF link annotation
    • http://elib-sd.msj.mis.sch.id/library/repository/coin-master-daily-free-spins_GM406889139.pdfIn PDF document text
    • http://elib-sd.msj.mis.sch.id/library/repository/coin-master-hack-android-root_GM406889139.pdfIn PDF document text
    • http://elib-sd.msj.mis.sch.id/library/repository/coin-master-hack-blog_GM406889139.pdfIn PDF document text
    • http://elib-sd.msj.mis.sch.id/library/repository/coin-master-hack-app-download-free_GM406889139.pdfIn PDF document text
    • http://elib-sd.msj.mis.sch.id/library/repository/coin-master-hack-apk-35-13_GM406889139.pdfIn PDF document text
    • http://elib-sd.msj.mis.sch.id/library/repository/coin-master-free-spins-cheat_GM406889139.pdfIn PDF document text
    • http://elib-sd.msj.mis.sch.id/library/repository/free-spin-hack-coin-master-2021_GM406889139.pdfIn PDF document text
    • http://elib-sd.msj.mis.sch.id/library/repository/roblox36com-free-robux_GM431946152.pdfIn PDF document text
    • http://elib-sd.msj.mis.sch.id/library/repository/minecraft-pe-hacks-2021_GM479516143.pdfIn PDF document text
    • http://elib-sd.msj.mis.sch.id/library/repository/coin-master-extra-spins_GM406889139.pdfIn PDF document text
    • http://elib-sd.msj.mis.sch.id/library/repository/how-do-i-get-free-spins-in-coin-master_GM406889139.pdfIn PDF document text
    • http://elib-sd.msj.mis.sch.id/library/repository/free-daily-spins-coin-master-2021_GM406889139.pdfIn PDF document text
    • http://elib-sd.msj.mis.sch.id/library/repository/old-roblox-accounts-for-free_GM431946152.pdfIn PDF document text
    • http://elib-sd.msj.mis.sch.id/library/repository/hack-coin-master-download_GM406889139.pdfIn PDF document text
    • http://elib-sd.msj.mis.sch.id/library/repository/coin-master-heaven-free-spins-today_GM406889139.pdfIn PDF document text
    • http://elib-sd.msj.mis.sch.id/library/repository/coin-master-200-spin-link_GM406889139.pdfIn PDF document text
    • http://elib-sd.msj.mis.sch.id/library/repository/how-to-free-robux_GM431946152.pdfIn PDF document text
    • http://elib-sd.msj.mis.sch.id/library/repository/how-to-hack-roblox-accounts-on-phone_GM431946152.pdfIn PDF document text
    • http://elib-sd.msj.mis.sch.id/library/repository/free-robux-hack_GM431946152.pdfIn PDF document text
    • http://elib-sd.msj.mis.sch.id/library/repository/how-to-get-free-hats-on-roblox_GM431946152.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_003_off00004c1f.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4C1F 25148 bytes
SHA-256: 4bfe2b5c22fe1eacd6d80df13a201233140df0c9a224946bd5798224776b5de1
font_01_sfnt_off00008497.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8497 2820 bytes
SHA-256: 96a70491b0783ad8c6fc9b11a18f021aa22c69ac41ee4499b781d16a1b99b689
font_02_sfnt_off00008e38.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8E38 18264 bytes
SHA-256: 5ec3f0b561cebc5d47f64e939320a46a649b92723dcace5f5f230f044584545d

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