Malicious PDF — malware analysis report

Static analysis result for SHA-256 864de02501667fd6…

MALICIOUS

PDF

41.3 KB Created: 2021-05-10 12:02:04 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-24
MD5: 5bc05d5d82f0ceb8bb69ad86aea0b915 SHA-1: 695ab12a4e50c426a88d1a0c9863becd545b1980 SHA-256: 864de02501667fd69e5a0eaf8624592953064e9ae6d241626d9be45c4115f527
130 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains embedded text and links that mimic a "Coin Master Free Shield" generator, a common lure for phishing or malware distribution. The primary link directs to a known malicious redirector, indicating a high likelihood of leading to a malicious payload or phishing site. While no scripts were explicitly extracted, the PDF structure and embedded URLs strongly suggest an attempt to exploit user interest in game-related cheats to drive traffic to malicious infrastructure.

Machine Learning

  • Nyx PDF Classifier clean score 0.0125

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-shield-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_off000039f5.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x39F5 26584 bytes
SHA-256: 8f60311c068312040b29d0c4ecbe524eeb33f21072c9e30f545ce8c77a68ad6e
font_01_sfnt_off00007456.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7456 3444 bytes
SHA-256: 6c64b2d5ed5363ca6cc07fbe34a3bfd9eea5f1aa19e3454382e4953d304576a5
font_02_sfnt_off00008081.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8081 18124 bytes
SHA-256: 0603797a96d274ba874b32f91d1fb50d5f45d88cdb7e6803905a22f8023fb5df

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