Malicious PDF — malware analysis report

Static analysis result for SHA-256 f543c08de1d5ff9b…

MALICIOUS

PDF

36.5 KB Created: 2021-05-23 15:36:46 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-08-25
MD5: fe77e22a09f144f8e1ab752ff4788aea SHA-1: 70dc43a487c64df4581bdd82d32b3d46390b78ca SHA-256: f543c08de1d5ff9b5be9bb6787cd11b541b785fc4d02bac11d61e86a1b9c1c37
130 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains a lure for a 'free generator / game hack' which links to a known malicious redirector. The document body also contains text and a URL that reinforce this lure. While no scripts were extracted, the presence of malicious redirector links and the lure 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 0.0718

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-get-minecraft-for-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
stream_002_off00002dbc.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x2DBC 29080 bytes
SHA-256: 7c33a62230e231d3bee1303bd15962f1e3a5bb46a0bfec8122e3035c34f5181b
font_01_sfnt_off00006efc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6EFC 17872 bytes
SHA-256: f310131035db742f338f230ab2c5697c5d59cc25d8943e3e3339342bb09010ba

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