Malicious PDF — malware analysis report

Static analysis result for SHA-256 a0d269ff6b03ed0f…

MALICIOUS

PDF

38.9 KB Created: 2021-05-12 06:35:08 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-13
MD5: e904801fceab965a60f01b537ebdf263 SHA-1: aa7ef4fbe99027fedf9dd264d404aa83d2340ad2 SHA-256: a0d269ff6b03ed0f092eefae8997be2813e40cd93e541a614eb0242e9624a18b
130 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a game hack redirect lure, pointing to a malicious URL. The document body and embedded artifacts suggest a lure to a fake generator or hack, likely intended to trick users into visiting a malicious site. While no scripts were directly extracted, the PDF structure and embedded links indicate a social engineering attack.

Machine Learning

  • Nyx PDF Classifier clean score 0.0127

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/coin-master-free-online-game-hack In PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_003_off00002fc7.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x2FC7 26964 bytes
SHA-256: 8d3495566ca5a1536f4930598458dde0ba5bd8e54f59e0f0db2b9da2a9a8a420
font_01_sfnt_off00006e0f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6E0F 2944 bytes
SHA-256: fcfcd28869b8d6c7503d63ed8d48371ec5b580fea2733193e2acbb82b3d30a76
font_02_sfnt_off00007839.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7839 17784 bytes
SHA-256: 5cb4b072a296e1d0a116510b6a928a0a81b450dccfe828cef627c6c52934b7a2

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