Malicious PDF — malware analysis report

Static analysis result for SHA-256 7846a9bfa504faad…

MALICIOUS

PDF

29.1 KB Created: 2021-07-20 20:24:52 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-16
MD5: 1384c24a9c5ac0323591e21d5c8ce9aa SHA-1: 6870d48e93a4c1f87b395cec121989ac9d3476ab SHA-256: 7846a9bfa504faad3bbfe976a88d459b93d7425eb77f73884d470ee931e18e3b
130 Risk Score

Malware Insights

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

The PDF file contains a link that redirects to a known malicious infrastructure, masquerading as a 'free generator / game hack'. This lure is intended to trick users into visiting the malicious site, likely to download further malware or engage in phishing. The document body contains obfuscated text and a call-to-action phrase, reinforcing the deceptive nature of the PDF.

Machine Learning

  • Nyx PDF Classifier clean score 0.0553

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/minecraft-pe-free-ios-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_off000020e6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x20E6 21964 bytes
SHA-256: 89eb44add6f11954bf7b2b89c7319ee1a617663c6f83024ffd68dbb0b199cf9f
font_01_sfnt_off00005168.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5168 17864 bytes
SHA-256: 9df2ada10360c1ec44bdaa5c5cca5c0d6bee254865ff2f5281c544f8bee3309a

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