Malicious PDF — malware analysis report

Static analysis result for SHA-256 6f45ffb963d05c43…

MALICIOUS

PDF

41.4 KB Created: 2021-05-13 08:32:16 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-29
MD5: 87ae4d2c964670b8ce14596f42dda56c SHA-1: 93fa529dcfbe3e835f45cc3fcedd6d919de5825d SHA-256: 6f45ffb963d05c4359e91efba45b6b32b64c59fb155176d71faef921dbff21aa
76 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple embedded links that redirect to websites offering game hacks and free spins, a common lure for phishing or malware distribution. The ML classifier strongly flagged this PDF as malicious, and the heuristic rules confirm the presence of game hack lures. While no scripts were explicitly extracted, the document's structure and embedded URLs suggest it's designed to trick users into navigating to potentially harmful external sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9994

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.
  • External URI info PDF_URI
    PDF contains an external URL action
  • PDF differential parser failed info PDF_DIFFERENTIAL_PARSE_FAILED
    The cross-check parser (pdfminer.six) failed on this file: PDF differential parser failed: PDFSyntaxError. Static heuristics still ran and any of their findings above are valid; only the differential cross-check signal is missing.
  • 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/free-spins-coin-master-2021-today-game-hack PDF link annotation
    • http://www.salwangurgaon.com/files/hack-coin-master-net_GM406889139.pdfIn PDF document text
    • http://www.salwangurgaon.com/files/coin-master-free-spin-link-today-16-11-2021_GM406889139.pdfIn PDF document text
    • http://www.salwangurgaon.com/files/mcpe-hack-client_GM479516143.pdfIn PDF document text
    • http://www.salwangurgaon.com/files/roblox-place-rewards_GM431946152.pdfIn PDF document text
    • http://www.salwangurgaon.com/files/free-robux-without-any-verification_GM431946152.pdfIn PDF document text
    • http://www.salwangurgaon.com/files/legit-coin-master-hack_GM406889139.pdfIn PDF document text
    • http://www.salwangurgaon.com/files/www-coinmaster_GM406889139.pdfIn PDF document text
    • http://www.salwangurgaon.com/files/roblox-free-robux-website_GM431946152.pdfIn PDF document text
    • http://www.salwangurgaon.com/files/freerobuxhack-us-2021_GM431946152.pdfIn PDF document text
    • http://www.salwangurgaon.com/files/free-robux-gen_GM431946152.pdfIn PDF document text
    • http://www.salwangurgaon.com/files/coin-master-apk-hack-mod-download_GM406889139.pdfIn PDF document text
    • http://www.salwangurgaon.com/files/how-to-get-free-robux-without-any-verification_GM431946152.pdfIn PDF document text
    • http://www.salwangurgaon.com/files/free-robux-generator-2021_GM431946152.pdfIn PDF document text
    • http://www.salwangurgaon.com/files/earn-free-robux-today_GM431946152.pdfIn PDF document text
    • http://www.salwangurgaon.com/files/coin-master-generator-hack_GM406889139.pdfIn PDF document text
    • http://www.salwangurgaon.com/files/coin-master-free-spins-link-2021-blogger_GM406889139.pdfIn PDF document text
    • http://www.salwangurgaon.com/files/free-robux-2021-no-verification_GM431946152.pdfIn PDF document text
    • http://www.salwangurgaon.com/files/hack-coin-master-site-rssingcom_GM406889139.pdfIn PDF document text
    • http://www.salwangurgaon.com/files/can-i-have-robux_GM431946152.pdfIn PDF document text
    • http://www.salwangurgaon.com/files/haktuts-coin-master_GM406889139.pdfIn 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_003_off00004671.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4671 24896 bytes
SHA-256: 9e8b24d38cb9c41bfd8c5d282139b14590932ce08956d0488a716fb395f16756
font_01_sfnt_off00007e7e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7E7E 18644 bytes
SHA-256: fb34871543d4e589edaa7b6b6daea61d4b413826d533968c66bf721badb2f47c

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