Malicious PDF — malware analysis report

Static analysis result for SHA-256 4e8213673d088764…

MALICIOUS

PDF

37.8 KB Created: 2021-05-13 09:08:02 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-11-22
MD5: 1e1a4f0316a9489a12ef8ddfa59924ee SHA-1: e89079d921996f41ed2f323b201a514e2d7032a8 SHA-256: 4e8213673d088764660fd1a351847e5d8dea90bcb5732a003af7c73191400f28
150 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 game hack lure, directing users to a known malicious redirector. The document body text, though partially obfuscated, contains phrases like 'CLICK HERE TO ACCESS MINECRAFT GENERATOR' and the malicious URL, reinforcing the phishing and redirection attempt. While no scripts were extracted, the PDF structure and embedded URL strongly suggest an attempt to lead the user to a malicious site, likely for further exploitation or credential harvesting.

Machine Learning

  • Nyx PDF Classifier clean score 0.0334

Heuristics 5

  • 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.
  • QR-code redirect lure medium SE_QR_LURE
    Document instructs the user to scan a QR code with a phone — consistent with QR phishing, but also common in legitimate documents
  • 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/hacker-minecraft-song-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
stream_003_off000036ef.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x36EF 26204 bytes
SHA-256: ee30c839de850f6954c046938a1c5463fcace306dc29b2ab292c17ab8dfb1b88
font_01_sfnt_off000072cc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x72CC 18168 bytes
SHA-256: 37e3c409e679a213a10e0592b8ff177cf348fa9834d19b03b17241e7ed0c948b

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