Malicious PDF — malware analysis report

Static analysis result for SHA-256 6c11eb2d3ec1a95d…

MALICIOUS

PDF

41.2 KB Created: 2021-05-20 14:19:14 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-24
MD5: b3b7e292549fc6d6abb6781cc0666ada SHA-1: dcd7d1f9cc3151630c9d16187db248bcd3843cf6 SHA-256: 6c11eb2d3ec1a95d80d83f45dc2cdddca44b0d7603ceccdfb2ea3bb63fd9353d
170 Risk Score

Malware Insights

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

The PDF document contains multiple heuristics indicating malicious intent, including links to known malicious redirectors and a lure for harvesting MFA codes. The document body explicitly mentions 'Synapse Roblox Free Download' and 'CLICK HERE TO ACCESS ROBLOX GENERATOR', directing users to a suspicious URL. The presence of these elements strongly suggests a phishing or credential harvesting attempt disguised as a game hack generator.

Machine Learning

  • Nyx PDF Classifier clean score 0.0133

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.
  • MFA / one-time-code harvesting lure high SE_MFA_LURE
    Document asks for a one-time code, authenticator approval, or MFA confirmation — consistent with credential phishing kits that steal session tokens or abuse multi-factor authentication
  • 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/synapse-roblox-free-download-game-hack In PDF document text
    • https://www.roblox.comIn 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_002_off00002fa2.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x2FA2 29132 bytes
SHA-256: 288883accb1f3f773afff3ef47bd54e3a905e663658f28117438288ac9ab5d6f
font_01_sfnt_off00007282.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7282 3400 bytes
SHA-256: 4b3e0f36ad1e0c7e3ea5c178fd2b4f097d1e01575fc6a4101a8b520db34dfe07
font_02_sfnt_off00007dac.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7DAC 19036 bytes
SHA-256: 893248d405b3cd6ab4cc16169dbaa725a15df4f046ef9721aa1aaf04f233e0f3

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