Malicious PDF — malware analysis report

Static analysis result for SHA-256 b79affc78dfcf51e…

MALICIOUS

PDF

36.8 KB Created: 2021-05-14 22:08:13 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-27
MD5: 6a8466848f49ff97257a374df93a1da2 SHA-1: ddae4ca79ebb6fdb93e25d8236af16d84a75f932 SHA-256: b79affc78dfcf51e65e975144280d37c28b515bb383b99430486d3861c879d01
130 Risk Score

Malware Insights

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

The PDF document contains embedded links that redirect to known malicious infrastructure, specifically promoting a 'game hack' or generator. The document body text and heuristics indicate a lure to download a payload. While no scripts were directly extracted, the PDF structure and embedded URLs strongly suggest an attempt to trick the user into navigating to a malicious site, likely to download further malware.

Machine Learning

  • Nyx PDF Classifier clean score 0.0313

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/how-to-download-minecraft-java-edition-for-free-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_off000033fd.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x33FD 25344 bytes
SHA-256: 6137e69cb57d8a31aad13e41ccdbb64024192b350ddadb856a187a3aea5f0b48
font_01_sfnt_off00006dc6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6DC6 18572 bytes
SHA-256: 372950b09ae56ccdc45362242de33d197b063ee091c9df90a0e91acdbb6b8628

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