Malicious PDF — malware analysis report

Static analysis result for SHA-256 9aba61e3be028d83…

MALICIOUS

PDF

31.1 KB Created: 2021-07-18 23:10:55 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-16
MD5: 4e37a0986b679e5bbec454dda78a71a9 SHA-1: fe5c11fa71d04ed3bb25556b8370d6e632e5ad4f SHA-256: 9aba61e3be028d83252024f94a9578dd51c80144872815efa3d5c6c7475f25c2
130 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF document contains a critical heuristic firing for a malicious redirector link, specifically pointing to 'http://netcdn.tw/app/479516143/free-texture-packs-for-minecraft-pe-game-hack'. This URL is presented as a lure for a 'free generator / game hack', indicating a social engineering tactic to trick users into visiting malicious infrastructure. The presence of embedded URLs and a download button lure further supports this attack pattern.

Machine Learning

  • Nyx PDF Classifier clean score 0.0580

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/479516143/free-texture-packs-for-minecraft-pe-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_off00002515.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2515 22784 bytes
SHA-256: 5c23660de3350664f2c63ecb9a1df4b4c340e05b00469a3d9b26753c8c92396a
font_01_sfnt_off00005821.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5821 18384 bytes
SHA-256: 4bd922cb808520f712e6f68915d55ea385c9bd17e049420b207e71ca6d562f93