Malicious PDF — malware analysis report

Static analysis result for SHA-256 3a1d7c296a222504…

MALICIOUS

PDF

34.1 KB Created: 2021-05-21 17:09:02 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-17
MD5: 7dcee4f9266e443f20538609ad8ea2ef SHA-1: f912fc027d7290f887d169f37ac1c4b9587dc4fe SHA-256: 3a1d7c296a2225046d3fcf8fc3a1c65168b4978b9fb30f5707631f9aeb5bc1d5
132 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF document impersonates Microsoft and uses a fake CAPTCHA lure to trick the user into clicking a link. This link, 'https://netcdn.xyz/app/431946152/free-old-roblox-accounts-game-hack', promises free game accounts, which is a common tactic for credential phishing or distributing malware. No scripts were extracted, but the PDF structure and embedded URI strongly suggest a malicious intent to deceive the user.

Machine Learning

  • Nyx PDF Classifier clean score 0.0718

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.
  • Fake CAPTCHA / human verification prompt high SE_FAKE_CAPTCHA
    Document displays a fake CAPTCHA or human-verification prompt — used to trick users into running commands or pressing keyboard shortcuts
  • 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/free-old-roblox-accounts-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/free-old-roblox-accounts-game-hack PDF link annotation
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_002_off00002ba8.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x2BA8 24944 bytes
SHA-256: 9811217a4293db54b060e1006904984c9e9c8b50f2840fddd1acd759b560cabf
font_01_sfnt_off000063f1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x63F1 18368 bytes
SHA-256: ba2f6d3da4eaca6d1fdd270dc574262566f59b0810be26bac781a581096b393b

Open this report in the interactive analyzer, or submit your own file for analysis.