Malicious PDF — malware analysis report

Static analysis result for SHA-256 f2a8d069171b175c…

MALICIOUS

PDF

28.1 KB Created: 2021-07-05 12:11:49 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-27
MD5: d0fb025db5b19ff3cc88f1ba04be9cc6 SHA-1: 6b66b453dd4a6cb4c42f149e9b0218818261228c SHA-256: f2a8d069171b175cf82a0c0c203ca84338546ab420c5194d95085bb720a29448
130 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains a link that redirects to known malicious infrastructure, disguised as a 'free generator / game hack'. The document body also contains a call-to-action phrase, reinforcing the lure. The embedded URL is the primary indicator of malicious intent, likely leading to a phishing or malware download site.

Machine Learning

  • Nyx PDF Classifier clean score 0.0328

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 http://netcdn.tw/app/406889139/free-spins-coin-master-links-no-human-verification-game-hack In PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000176e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x176E 22888 bytes
SHA-256: a802cc8ce4fcfdeb257d2709412fc8f10eb5efb847917e4bf8f4ba42943142c6
font_01_sfnt_off00004ac1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x4AC1 18880 bytes
SHA-256: bae7cc3adddbb08ac14a4132461e215e64c81c27f71b43f07da60d570db63156