Malicious PDF — malware analysis report

Static analysis result for SHA-256 fe06b6b218179c5d…

MALICIOUS

PDF

38.9 KB Created: 2021-05-13 09:05:31 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-07
MD5: 519f4a30fac0df057865a2fea2a71217 SHA-1: 39bebcee1c59e317a7a0055c49ddfe1c35ab0e45 SHA-256: fe06b6b218179c5d0942003dd1a6306dde417b673d99953a0789394fadd78803
170 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains a fake CAPTCHA and a "Click here to download" call-to-action, which are common lures for phishing or scamming. It embeds URLs pointing to malicious redirectors, specifically `https://netcdn.xyz/app/431946152/best-roblox-hacks-game-hack` and `https://rblx.land`, which are associated with malicious redirector infrastructure. The document's content and embedded links suggest an attempt to trick users into downloading potentially harmful content or engaging in a scam.

Machine Learning

  • Nyx PDF Classifier clean score 0.0127

Heuristics 5

  • PDF links to a 'free generator / game hack' redirector critical 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. CRITICAL on its own: the /app/<id>/<slug>-game-hack path shape is unambiguous scam infra, and the host rotates so a host-list match can't be relied on.
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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
  • 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
  • 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/best-roblox-hacks-game-hack In PDF document text
    • https://rblx.landIn 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_off00003031.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x3031 25876 bytes
SHA-256: 2f6d73e1b4a33ac06babb9103c33b586cef9112cabc43a231441e7f2dadabf42
font_01_sfnt_off00006c57.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6C57 2888 bytes
SHA-256: dcdd98ee8e25436a83587ccb4027347dd2c3fcec95f3413942edd4086125bcca
font_02_sfnt_off0000762a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x762A 18284 bytes
SHA-256: 94dd9c95e592a650c73b90ca092c2767a8462919e19feedd0474aea1e75e19d3

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