Malicious PDF — malware analysis report

Static analysis result for SHA-256 6b018c9b8319153e…

MALICIOUS

PDF

39.2 KB Created: 2021-05-10 11:22:31 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-05
MD5: 9ff76f33c41b48c01dd0f5a78d205cea SHA-1: 0a06582a3a70253848519a3131f7754f2c16a956 SHA-256: 6b018c9b8319153ecb8bd79081a341a6e35dcbfd634dabbc2e486f05227561fd
92 Risk Score

Malware Insights

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

This PDF document was flagged as malicious. 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 clean score 0.0128

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/ww-roblox-come-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/ww-roblox-come-game-hack PDF link annotation
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_003_off0000336b.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x336B 25044 bytes
SHA-256: 34b204a19f38d85a19074247a9689bb9ac361ec594632473f6f06debd23fd0f1
font_01_sfnt_off00006d8f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6D8F 2840 bytes
SHA-256: 3fb127b764b9d10f5525bc4de5ec8316de704409ccb0cf21cff3ad8a30d11676
font_02_sfnt_off00007741.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7741 18404 bytes
SHA-256: 888324a908a3e314fa586c71b84bf0ea365017427310ce851cb3785b25609904

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