Malicious PDF — malware analysis report

Static analysis result for SHA-256 da70501ffae36107…

MALICIOUS

PDF

42.5 KB Created: 2021-05-14 08:14:43 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-17
MD5: 06ba7387d1d5d90a59f002455cf5cf40 SHA-1: 17ca18972b70d6b586fa7190ebea82a6224acc2e SHA-256: da70501ffae36107166fd425f9c7e2a038d24364004cfdf27306dac887d9b13d
130 Risk Score

Malware Insights

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

The PDF document contains a lure for a "free generator / game hack" which links to known malicious redirector infrastructure. The embedded URL is the primary indicator of malicious intent, likely leading to a further stage of compromise or a phishing page. No scripts were extracted, but the PDF structure and heuristics suggest a malicious redirector is the main goal.

Machine Learning

  • Nyx PDF Classifier clean score 0.0118

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/406889139/how-to-get-free-spins-and-coins-on-coin-master-game-hack In PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_003_off000032c9.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x32C9 24916 bytes
SHA-256: f709f338bb8d8a296fb19f0ae09352b0c72e787c13f6a4a82af42841ba1702d6
font_01_sfnt_off00006c15.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6C15 4216 bytes
SHA-256: 2065e131620157a699a521f4d80e855ced32cd2960ea4b10ad48398a0b56bd63
font_02_sfnt_off00007a8e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7A8E 2788 bytes
SHA-256: 6fd7c7f447d66842f81aa8cf197935b17f22157d0c7e9f95622df1b5b4ddf530
font_03_sfnt_off0000847d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x847D 18224 bytes
SHA-256: c3eeb8e5bbecb0a66d0dccf890560b2772aaf25cfcf2943a976e8e45774626aa

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