Malicious PDF — malware analysis report

Static analysis result for SHA-256 a301aefb05196339…

MALICIOUS

PDF

41.2 KB Created: 2021-06-03 06:35:23 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-11
MD5: 9ca817961bd4448865509c2fd70bef63 SHA-1: bccf3b135b562c06f5c097fe96b6c82658e1fccd SHA-256: a301aefb05196339cc6009ec17a27ae586b8f4cf47fde9cc023a2fd2dcf41914
130 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains heuristics indicating it links to a malicious redirector disguised as a game hack generator. The document body also contains a prominent call to action with a URL pointing to this malicious infrastructure. This suggests a phishing attempt to trick users into visiting a potentially harmful site.

Machine Learning

  • Nyx PDF Classifier clean score 0.0106

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.online/app/431946152/how-to-hack-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
font_00_sfnt_off00002247.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2247 25068 bytes
SHA-256: ef876653b283f773066c857bb192e3a369414d8f3cac5e3beb3506a5ac739ca8
font_01_sfnt_off00005a91.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5A91 12800 bytes
SHA-256: 101f6334f34a1af3279f2f5abd84d35f0880b215ceba589c816f962dafffd9db
font_02_sfnt_off0000826e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x826E 17432 bytes
SHA-256: d8fbaffeeb120c3aa2595d278d4eeb3b626c3334ca505327b8c205699fc4fb37

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