Malicious PDF — malware analysis report

Static analysis result for SHA-256 a2107065f04bee6c…

MALICIOUS

PDF

37.8 KB Created: 2021-05-22 11:38:03 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-23
MD5: d239e31cddbae5252a4b612d70aa24cc SHA-1: 5fa26177d734b1a0533ddac503c0ce026a296a59 SHA-256: a2107065f04bee6c3a41074dc0ae843193125879fa16b3b98e9b13abfd123a42
130 Risk Score

Malware Insights

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

The PDF file contains multiple heuristics indicating it is a malicious redirector lure, specifically referencing a 'game hack' and 'generator'. The document body and embedded links point to a URL known to host malicious redirector infrastructure. The primary purpose appears to be tricking users into clicking a link that leads to further malicious content or downloads.

Machine Learning

  • Nyx PDF Classifier clean score 0.0076

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/479516143/minecraft-xray-hack-game-hack In PDF document text
    • https://sigmaclient.info#2In PDF document text
    • https://flux.today#3In 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_off00002ef1.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x2EF1 25324 bytes
SHA-256: 093f5f6e161dbaaefa50e2ecb748bc032a34485b67ca96cd4cd95059ff145ef4
font_01_sfnt_off000068cc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x68CC 3128 bytes
SHA-256: 801f6fa60decd1add2f223f91580103c35e150c924465f86a7a572b3e00674f9
font_02_sfnt_off0000730b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x730B 18148 bytes
SHA-256: 9c34fd0c8743bea94cd185a71bc4ab0a09a2a7e1733d3a0e648e48e4699e62a4

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