Malicious PDF — malware analysis report

Static analysis result for SHA-256 4728a15bbb00f6f0…

MALICIOUS

PDF

44.7 KB Created: 2021-05-11 18:02:43 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-07
MD5: c7194317c4e936743a431a83d843b4db SHA-1: 8301050a56c88b88160019e7ef1a4afe587074b3 SHA-256: 4728a15bbb00f6f0417b551ff897ab9f5223d54f1d697ab336a10274f9c9d7fb
142 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF document employs a common lure of 'free Robux' or game hacks to entice users. It contains a large number of external links, identified as a PDF link farm, directing to various domains like 'greasley.website' and 'netcdn.xyz'. These links likely serve to manipulate search engine results or redirect users to potentially malicious content or further phishing attempts. No scripts were extracted, but the structure and external linking suggest a phishing or SEO manipulation campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9632

Heuristics 5

  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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/431946152/how-to-get-free-robux-hack-2021-game-hack PDF link annotation
    • http://greasley.website/images/how-do-you-get-free-roebucks_GM431946152.pdfIn PDF document text
    • http://greasley.website/images/how-to-get-free-robux-without-verification_GM431946152.pdfIn PDF document text
    • http://greasley.website/images/how-do-you-get-free-roblox-money_GM431946152.pdfIn PDF document text
    • http://greasley.website/images/coin-master-hack-ios-reddit_GM406889139.pdfIn PDF document text
    • http://greasley.website/images/lots-of-robux_GM431946152.pdfIn PDF document text
    • http://greasley.website/images/www-bandicam-com-free-robux_GM431946152.pdfIn PDF document text
    • http://greasley.website/images/roblox-com-free-robux_GM431946152.pdfIn PDF document text
    • http://greasley.website/images/coin-master-hacks-free-spins_GM406889139.pdfIn PDF document text
    • http://greasley.website/images/get-free-robux-2021_GM431946152.pdfIn PDF document text
    • http://greasley.website/images/coin-master-free-spin-and-coins-links_GM406889139.pdfIn PDF document text
    • http://greasley.website/images/hack-para-coin-master-sin-verification_GM406889139.pdfIn PDF document text
    • http://greasley.website/images/how-to-get-free-robux-hack_GM431946152.pdfIn PDF document text
    • http://greasley.website/images/coin-master-links-that-don-t-expire_GM406889139.pdfIn PDF document text
    • http://greasley.website/images/coin-master-hack-spins-download_GM406889139.pdfIn PDF document text
    • http://greasley.website/images/free-spins-and-coins-coin-master_GM406889139.pdfIn PDF document text
    • http://greasley.website/images/free-coin-link-for-coin-master_GM406889139.pdfIn PDF document text
    • http://greasley.website/images/online-hacking-tricks-coin-master_GM406889139.pdfIn PDF document text
    • http://greasley.website/images/free-robux-real-working_GM431946152.pdfIn PDF document text
    • http://greasley.website/images/hack-coin-master-1_GM406889139.pdfIn PDF document text
    • http://greasley.website/images/how-to-get-free-robux-codes-2021_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
font_00_sfnt_off000044fa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x44FA 25140 bytes
SHA-256: c28745e2888db400a9d65c0f31d3d9d2bdc1690c965e8cd68fe04ba157783fa9
font_01_sfnt_off00007f5e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7F5E 2896 bytes
SHA-256: a9734f601ab51531ddc627968baf99e061fe05a52d08fb24eabe5a53f69c0820
font_02_sfnt_off0000895e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x895E 19084 bytes
SHA-256: bf126c80224e4ece1a877f3c45a4e2f725662c205f8b78a709aa4c80730d283c

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