Malicious PDF — malware analysis report

Static analysis result for SHA-256 915282868178ce52…

MALICIOUS

PDF

39.5 KB Created: 2021-05-23 18:34:55 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-17
MD5: 67638a9ecc670b3353f368b4a21a5916 SHA-1: de073d22645df24db0a431a726759b9f7d403063 SHA-256: 915282868178ce524532bf0100fcf11eda92d1e180ef78acf6a1a7c941f11ef0
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple links, with a primary focus on a 'Coin Master Daily Free Spins Link' lure, which is a common tactic for phishing or malware distribution. The ML classifier also flagged the PDF as malicious. While no scripts were directly extracted, the embedded URI and game hack lure suggest an attempt to redirect the user to a malicious site, likely for credential harvesting or further payload delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8060

Heuristics 4

  • PDF links to a 'free generator / game hack' redirector high 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.
  • 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
  • External URI info PDF_URI
    PDF contains an external URL action
  • 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-daily-free-spins-link-game-hack PDF link annotation
    • https://cluster-consulting.com/images/free-robux-websites-2021_GM431946152.pdfIn PDF document text
    • https://cluster-consulting.com/images/pokemon-go-free-zapdos_GM1094591345.pdfIn PDF document text
    • https://cluster-consulting.com/images/how-to-get-free-robux-on-phone-2021_GM431946152.pdfIn PDF document text
    • https://cluster-consulting.com/images/coin-master-free-spins-daily_GM406889139.pdfIn PDF document text
    • https://cluster-consulting.com/images/free-robux-generator_GM431946152.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_002_off00003507.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x3507 24328 bytes
SHA-256: 77430355b5c44b369e1f525870bf9ecf84f5c84500730875c53d11d2ed27eabf
font_01_sfnt_off00006c7a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6C7A 3380 bytes
SHA-256: 1dd933c112880b232546f3aab6a17784a8f412d39fd551cc6eb31c5a04c3ce57
font_02_sfnt_off00007863.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7863 18476 bytes
SHA-256: dd1e9edcae6782c480dff53724a1580fadec54e6656b8ddfb273bcd699f2c343

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