Malicious PDF — malware analysis report

Static analysis result for SHA-256 2e83064930b68851…

MALICIOUS

PDF

45.6 KB Created: 2021-06-08 00:18:48 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-27
MD5: a534e994a25dfb4d86d517aea10afafd SHA-1: 6bfa412b2c6759383455c3a4084f5e1c8fcf7880 SHA-256: 2e83064930b68851cadd9ef0bd84524769fd8cb78f3cb83df857dc703c67578a
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple links to websites offering 'free Robux' or game hacks, a common lure for phishing or malware distribution. The ML classifier also flagged this PDF as malicious. While no scripts were explicitly extracted, the presence of embedded URLs and the nature of the lure suggest the document is designed to redirect users to malicious content, likely for credential harvesting or further malware deployment.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9864

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.tw/app/431946152/how-to-get-free-robux-earnrobuxzone-game-hack PDF link annotation
    • http://ff-klaffenbach.de/images/minecraft-java-edition-redeem-code-free-2021_GM479516143.pdfIn PDF document text
    • http://ff-klaffenbach.de/images/free-roblox-source-dll_GM431946152.pdfIn PDF document text
    • http://ff-klaffenbach.de/images/roblox-free-clothes-generator_GM431946152.pdfIn PDF document text
    • http://ff-klaffenbach.de/images/free-robux-websites-that-work_GM431946152.pdfIn PDF document text
    • http://ff-klaffenbach.de/images/minecraft-java-hacks_GM479516143.pdfIn PDF document text
    • http://ff-klaffenbach.de/images/coin-master-free-coins-link-2021_GM406889139.pdfIn PDF document text
    • http://ff-klaffenbach.de/images/free-coin-master-coins-and-spins_GM406889139.pdfIn PDF document text
    • http://ff-klaffenbach.de/images/how-do-u-get-free-robux-2021_GM431946152.pdfIn PDF document text
    • http://ff-klaffenbach.de/images/free-spins-coin-master-hack-2021_GM406889139.pdfIn PDF document text
    • http://ff-klaffenbach.de/images/roblox-help-free-robux_GM431946152.pdfIn PDF document text
    • http://ff-klaffenbach.de/images/free-roblox-accounts-2021-with-robux_GM431946152.pdfIn PDF document text
    • http://ff-klaffenbach.de/images/websites-that-give-free-robux_GM431946152.pdfIn PDF document text
    • http://ff-klaffenbach.de/images/coin-master-games-download-free_GM406889139.pdfIn PDF document text
    • http://ff-klaffenbach.de/images/is-minecraft-bedrock-edition-free_GM479516143.pdfIn PDF document text
    • http://ff-klaffenbach.de/images/wahoo-gaming-co-free-robux_GM431946152.pdfIn PDF document text
    • http://ff-klaffenbach.de/images/coin-master-free-spins-facebook_GM406889139.pdfIn PDF document text
    • http://ff-klaffenbach.de/images/coin-master-free-spins-instagram_GM406889139.pdfIn PDF document text
    • http://ff-klaffenbach.de/images/robux-hack-2021_GM431946152.pdfIn PDF document text
    • http://ff-klaffenbach.de/images/how-to-get-free-spins-and-coins-in-coin-master_GM406889139.pdfIn PDF document text
    • http://ff-klaffenbach.de/images/cool-minecraft-hacks_GM479516143.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_004_off00005058.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x5058 27424 bytes
SHA-256: c2416ac41eab5741d8bc7c024ac9dd0b5438246045fd043a02558a396af77336
font_01_sfnt_off00008e98.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8E98 18592 bytes
SHA-256: 77fb62edd8c99990a7e961e1ae4eea7147172ef971f0a843ce75c11a86f8c283

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