Malicious PDF — malware analysis report

Static analysis result for SHA-256 645fe957f541f098…

MALICIOUS

PDF

45.3 KB Created: 2021-05-11 09:31:52 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-29
MD5: f34d3cc40be2358448efbfa44c0c1789 SHA-1: 32904a1d691360b4d3b9800f92c0d537febbf5be SHA-256: 645fe957f541f0983eba97e33180d21741e8cef96eda147356e93d1206b1e0fd
102 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains multiple links and references to game hacks and free spins for games like Coin Master and Roblox. The primary link, https://netcdn.xyz/app/406889139/coin-master-links-free-spins-game-hack, is flagged as a game hack redirector. This suggests the document is designed to trick users into visiting malicious websites, likely for phishing or to download further malware. No scripts were extracted, but the embedded URLs and the nature of the lures strongly indicate a malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9507

Heuristics 5

  • 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.
  • Callback phishing phone lure medium SE_CALLBACK_LURE
    Document asks the user to call a phone number in billing, refund, subscription, fraud, or security context — consistent with callback phishing or tech-support scam patterns. Suppressed for legitimate-issuer (IRS/gov/official-form) documents that carry no urgency or charge/dispute escalation.
  • 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-links-free-spins-game-hack PDF link annotation
    • http://www.b2bonline.ph/uploaded_files/userfiles/files/hack-robux_GM431946152.pdfIn PDF document text
    • http://www.b2bonline.ph/uploaded_files/userfiles/files/coin-master-35-2-hack_GM406889139.pdfIn PDF document text
    • http://www.b2bonline.ph/uploaded_files/userfiles/files/coin-master-hack-tool-no-survey_GM406889139.pdfIn PDF document text
    • http://www.b2bonline.ph/uploaded_files/userfiles/files/free-spins-for-coin-master_GM406889139.pdfIn PDF document text
    • http://www.b2bonline.ph/uploaded_files/userfiles/files/roblox-fly-hack_GM431946152.pdfIn PDF document text
    • http://www.b2bonline.ph/uploaded_files/userfiles/files/my-roblox-avatar_GM431946152.pdfIn PDF document text
    • http://www.b2bonline.ph/uploaded_files/userfiles/files/tiradas-coin-master_GM406889139.pdfIn PDF document text
    • http://www.b2bonline.ph/uploaded_files/userfiles/files/coin-master-hack-2021-app_GM406889139.pdfIn PDF document text
    • http://www.b2bonline.ph/uploaded_files/userfiles/files/coin-master-free-spins-apple_GM406889139.pdfIn PDF document text
    • http://www.b2bonline.ph/uploaded_files/userfiles/files/free-spins-on-coin-master_GM406889139.pdfIn PDF document text
    • http://www.b2bonline.ph/uploaded_files/userfiles/files/roblox-imagine_GM431946152.pdfIn PDF document text
    • http://www.b2bonline.ph/uploaded_files/userfiles/files/how-can-i-get-free-robux_GM431946152.pdfIn PDF document text
    • http://www.b2bonline.ph/uploaded_files/userfiles/files/coin-master-free-spins-link-download_GM406889139.pdfIn PDF document text
    • http://www.b2bonline.ph/uploaded_files/userfiles/files/coin-master-hacks-to-get-spins_GM406889139.pdfIn PDF document text
    • http://www.b2bonline.ph/uploaded_files/userfiles/files/huskybuckscom-free-robux_GM431946152.pdfIn PDF document text
    • http://www.b2bonline.ph/uploaded_files/userfiles/files/free-spins-coin-master-links-twitter_GM406889139.pdfIn PDF document text
    • http://www.b2bonline.ph/uploaded_files/userfiles/files/where-to-get-free-robux_GM431946152.pdfIn PDF document text
    • http://www.b2bonline.ph/uploaded_files/userfiles/files/how-to-hack-roblox-accounts-on-phone_GM431946152.pdfIn PDF document text
    • http://www.b2bonline.ph/uploaded_files/userfiles/files/minecraft-free-download-pc_GM479516143.pdfIn PDF document text
    • http://www.b2bonline.ph/uploaded_files/userfiles/files/how-to-get-free-robux-instantly_GM431946152.pdfIn 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_off00004a32.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4A32 25968 bytes
SHA-256: 31456e09c7ae02591c188473aa94a2098d2aaa34ffe2e744563acc3991a51770
font_01_sfnt_off000085a1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x85A1 2840 bytes
SHA-256: 3fb127b764b9d10f5525bc4de5ec8316de704409ccb0cf21cff3ad8a30d11676
font_02_sfnt_off00008f53.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8F53 18056 bytes
SHA-256: 95118de0f1fa2d9d8d6d34d7ce9f6e9c56d43c25fce4d2a4bd556d275959b9e0

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