Malicious PDF — malware analysis report

Static analysis result for SHA-256 0faf74a2b42e2c1e…

MALICIOUS

PDF

45.1 KB Created: 2021-05-11 09:38:00 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-02
MD5: d5dd35b27fbc11ff2f47847b0fd3b2f2 SHA-1: fbaefe97cf82eef77dfe898549620a355cd636f8 SHA-256: 0faf74a2b42e2c1e3bc6e2e6be481cb3011ca2cb6091b04e6a362e08794d9f7c
130 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 an urgency-based 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/431946152/roblox-robux-generator-http-freerobuxgenerator-xyz-game-hack.
  • Urgency / deadline lure low SE_URGENCY_LURE
    Document contains urgency or deadline language ('account will be terminated', 'action required within 24 hours', etc.) — useful context, but low-signal without other findings
  • 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/roblox-robux-generator-http-freerobuxgenerator-xyz-game-hack PDF link annotation
    • http://parsbaft.com/images/free-robux-exe_GM431946152.pdfIn PDF document text
    • http://parsbaft.com/images/roblox-free-hats_GM431946152.pdfIn PDF document text
    • http://parsbaft.com/images/free-daily-spins-coin-master_GM406889139.pdfIn PDF document text
    • http://parsbaft.com/images/hacks-for-minecraft-bedrock_GM479516143.pdfIn PDF document text
    • http://parsbaft.com/images/roblox-2021-hack_GM431946152.pdfIn PDF document text
    • http://parsbaft.com/images/coin-master-level-4_GM406889139.pdfIn PDF document text
    • http://parsbaft.com/images/roblox-free-robux-hack_GM431946152.pdfIn PDF document text
    • http://parsbaft.com/images/coin-master-mod-apk_GM406889139.pdfIn PDF document text
    • http://parsbaft.com/images/is-minecraft-java-edition-free_GM479516143.pdfIn PDF document text
    • http://parsbaft.com/images/free-robux-no-generator_GM431946152.pdfIn PDF document text
    • http://parsbaft.com/images/how-to-get-free-robux-codes-2021_GM431946152.pdfIn PDF document text
    • http://parsbaft.com/images/roblox-premium-free_GM431946152.pdfIn PDF document text
    • http://parsbaft.com/images/https-oprewards-com-roblox_GM431946152.pdfIn PDF document text
    • http://parsbaft.com/images/how-do-u-get-free-robux-2021_GM431946152.pdfIn PDF document text
    • http://parsbaft.com/images/coin-master-time-hack_GM406889139.pdfIn PDF document text
    • http://parsbaft.com/images/minecraft-free-school_GM479516143.pdfIn PDF document text
    • http://parsbaft.com/images/free-limiteds-roblox_GM431946152.pdfIn PDF document text
    • http://parsbaft.com/images/free-robux-images_GM431946152.pdfIn PDF document text
    • http://parsbaft.com/images/how-to-hack-to-get-robux_GM431946152.pdfIn PDF document text
    • http://parsbaft.com/images/coin-master-heaven-daily-free-spins-link-today_GM406889139.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_off00004949.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4949 25504 bytes
SHA-256: a7b4ce9c1e4d512d830b453b190a5ab2458d519ad0370d30f3bb3768463c68a7
font_01_sfnt_off00008138.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8138 2840 bytes
SHA-256: 3fb127b764b9d10f5525bc4de5ec8316de704409ccb0cf21cff3ad8a30d11676
font_02_sfnt_off00008ae9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8AE9 19148 bytes
SHA-256: ca12ce3d7dfc1e8f594ff16b8d50f9174b7c57a2d485e52127105fd2973060c9

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