Malicious PDF — malware analysis report

Static analysis result for SHA-256 e6f30897eb0c1e3b…

MALICIOUS

PDF

39.7 KB Created: 2021-05-11 01:51:40 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-31
MD5: 63a856360f737a5fe17b88873ce65836 SHA-1: 4dcec5cfad8042ec4f053cf29d64e44a7c1016b6 SHA-256: e6f30897eb0c1e3b546e23568e96868412ea6a7c0245310e875a2fa03e01eea0
130 Risk Score

Malware Insights

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

The PDF document contains text and a prominent "CLICK HERE TO ACCESS COIN MASTER GENERATOR" call-to-action, which is a common lure for phishing or scamming. The embedded URL, https://netcdn.xyz/app/406889139/coin-master-hack-apk-april-12-2021-game-hack, is flagged as a malicious redirector, indicating it likely leads to a further stage of infection or a scam. While no scripts were explicitly extracted, the PDF structure and the nature of the lure suggest potential for embedded exploits or malicious JavaScript, hence the inclusion of T1059.007 and T1203.

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/406889139/coin-master-hack-apk-april-12-2021-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_off000035de.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x35DE 25336 bytes
SHA-256: fca02380a0bfc805a44c76aa900e489d8129c2818489f22a8cb3bc350c6bb5ea
font_01_sfnt_off00006f84.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6F84 2896 bytes
SHA-256: c1a618813a64314343402b2ec738fc11c4c912460a4c7ae3029924d2f9a229cd
font_02_sfnt_off00007969.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7969 18368 bytes
SHA-256: 3b30659feb21661d356217d8966cbd258fac2e7fc1ab43a41212753c361910ee

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