Malicious PDF — malware analysis report

Static analysis result for SHA-256 db0ebc26f6bfb390…

MALICIOUS

PDF

40.4 KB Created: 2021-05-17 01:04:25 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-17
MD5: fbf3935282b6144ee0ed1ce0a6dc58c3 SHA-1: c7bce12b03f62e490391897cd79c6de68dc4a876 SHA-256: db0ebc26f6bfb390f0ae838588d862908662655a9cf107bd8fc5396b369bc32f
130 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains a critical heuristic firing for a game hack redirect lure, pointing to a URL associated with malicious redirector infrastructure. The document body explicitly contains the lure text 'How Do I Get Free Robux On Roblox' and a call to action 'CLICK HERE TO ACCESS ROBLOX GENERATOR', further supporting the phishing pretext. The embedded URL is the primary indicator of compromise.

Machine Learning

  • Nyx PDF Classifier clean score 0.0128

Heuristics 4

  • 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.
  • 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/how-do-i-get-free-robux-on-roblox-game-hack In 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_off000033bc.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x33BC 26676 bytes
SHA-256: d8fbc47daf99a356237b4c52027a87d625fedcbf19515f1a1c697f9e2e938b37
font_01_sfnt_off00007221.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7221 2824 bytes
SHA-256: 94c1b019735d7e491765340abe50b2897410e2ec65ecf141c08bd9f2220897c4
font_02_sfnt_off00007bd0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7BD0 18524 bytes
SHA-256: 4ccd670e6a0bad46446eeab730d71d218c542e1f5d690955267ad9a8693a3722

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