Malicious PDF — malware analysis report

Static analysis result for SHA-256 b83f326dd46dbe16…

MALICIOUS

PDF

45.5 KB Created: 2021-05-11 00:32:06 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-29
MD5: 4f949b50f8d0eaed4afb01777a5a6484 SHA-1: 5148f5cc260f32883c162bca5edd7c6422f51342 SHA-256: b83f326dd46dbe16005898f93831386001a802538c57350f5d96966eaccbe3e4
102 Risk Score

Malware Insights

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

The PDF document contains multiple links that are designed to lure users into clicking on them by promising game hacks and free currency. The primary link, 'https://netcdn.xyz/app/431946152/give-me-robux-now-game-hack', is flagged as a high-risk redirector. The document body and heuristics indicate a phishing or scam attempt, likely to lead to further malware downloads or credential harvesting.

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/431946152/give-me-robux-now-game-hack PDF link annotation
    • http://porownaj-laser.pl/images/how-to-hack-roblox-accounts-2021_GM431946152.pdfIn PDF document text
    • http://porownaj-laser.pl/images/rbx-free-robux_GM431946152.pdfIn PDF document text
    • http://porownaj-laser.pl/images/coin-master-free-spins-link-iphone_GM406889139.pdfIn PDF document text
    • http://porownaj-laser.pl/images/coin-master-hack-2021-free_GM406889139.pdfIn PDF document text
    • http://porownaj-laser.pl/images/coin-master-15-free-spin-link-today_GM406889139.pdfIn PDF document text
    • http://porownaj-laser.pl/images/robux-fun-hack_GM431946152.pdfIn PDF document text
    • http://porownaj-laser.pl/images/coin-master-free-spin-links-december-30-2021_GM406889139.pdfIn PDF document text
    • http://porownaj-laser.pl/images/free-roblox-accounts-2021-with-robux_GM431946152.pdfIn PDF document text
    • http://porownaj-laser.pl/images/free-robux-generator-no-human-verification-or-surveys_GM431946152.pdfIn PDF document text
    • http://porownaj-laser.pl/images/coin-master-spin-link-hack_GM406889139.pdfIn PDF document text
    • http://porownaj-laser.pl/images/minecraft-story-mode-free-download_GM479516143.pdfIn PDF document text
    • http://porownaj-laser.pl/images/spinuri-gratis-coin-master_GM406889139.pdfIn PDF document text
    • http://porownaj-laser.pl/images/cmaster-club-coin-master-hack_GM406889139.pdfIn PDF document text
    • http://porownaj-laser.pl/images/coin-master-levels_GM406889139.pdfIn PDF document text
    • http://porownaj-laser.pl/images/free-robux-gift-card-codes_GM431946152.pdfIn PDF document text
    • http://porownaj-laser.pl/images/free-robux-group_GM431946152.pdfIn PDF document text
    • http://porownaj-laser.pl/images/free-roblox-toy-codes_GM431946152.pdfIn PDF document text
    • http://porownaj-laser.pl/images/microsoft-bing-free-robux_GM431946152.pdfIn PDF document text
    • http://porownaj-laser.pl/images/free-account-roblox-2021_GM431946152.pdfIn PDF document text
    • http://porownaj-laser.pl/images/com-roblox_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_003_off00004833.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4833 26904 bytes
SHA-256: 4dc67a02e59df6e24bde9c7b9cf69a8e580fb81c4816a311884c8d9a0e467cf9
font_01_sfnt_off000084e0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x84E0 2840 bytes
SHA-256: 3fb127b764b9d10f5525bc4de5ec8316de704409ccb0cf21cff3ad8a30d11676
font_02_sfnt_off00008e92.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8E92 18444 bytes
SHA-256: da387504e4ee90144f6399ec13e2f6eb5be90933d390e8f78ca10c807e4b036a

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