Malicious PDF — malware analysis report

Static analysis result for SHA-256 34f7693fd5011d3f…

MALICIOUS

PDF

40.7 KB Created: 2021-05-04 23:51:05 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-29
MD5: 924c0d1dcfa210ca65482e421462f9c6 SHA-1: f2b56b94afa1452c73c3f0fe4f3f1df6ec6d034d SHA-256: 34f7693fd5011d3f235691be164a36e0fffdf3624c1e09bffd9e5e4a6b0f33c1
122 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.001 User Execution: Malicious Link

The PDF document contains a lure for a 'free Robux generator' and impersonates PayPal, directing users to a suspicious URL. The presence of multiple embedded URLs and the ML classifier's high confidence score indicate a malicious intent, likely for credential phishing or to serve a secondary payload.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9954

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/roblox-robux-hack-free-robux-generator-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/roblox-robux-hack-free-robux-generator-game-hack PDF link annotation
    • http://www.technibuild-group.com/uploaded_files/userfiles/files/roblox-apocalypse-rising-cheat-engine-codes.pdfIn PDF document text
    • http://technibuild-group.com/uploaded_files/userfiles/files/roblox-hack-no-survey-or-human-verification.pdfIn PDF document text
    • http://www.technibuild-group.com/uploaded_files/userfiles/files/trailer-roblox-hack.pdfIn PDF document text
    • http://www.technibuild-group.com/uploaded_files/userfiles/files/how-to-get-a-free-dominus-in-roblox-mobile.pdfIn PDF document text
    • http://www.technibuild-group.com/uploaded_files/userfiles/files/how-to-get-free-robux-no-inspect-2021.pdfIn PDF document text
    • http://www.technibuild-group.com/uploaded_files/userfiles/files/2021-robux-free-generator-no-survay-no-human-verification.pdfIn PDF document text
    • http://www.technibuild-group.com/uploaded_files/userfiles/files/extreme-injector-roblox-hack.pdfIn PDF document text
    • http://www.technibuild-group.com/uploaded_files/userfiles/files/free-robux-without-human-verification-android.pdfIn PDF document text
    • http://www.technibuild-group.com/uploaded_files/userfiles/files/roblox-free-robux-2021-hack.pdfIn PDF document text
    • http://www.technibuild-group.com/uploaded_files/userfiles/files/free-robux-generator-website.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_003_off00004244.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4244 25556 bytes
SHA-256: 06932bbdfe89d30b0c003e321a280b63fc98011b2a637953c5ef0cdf6a1f9cb8
font_01_sfnt_off00007c5b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7C5B 18588 bytes
SHA-256: 290481c489072d1a9609c819104e1f059c7bf6d78f63d2ebefddca61b8060bae

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