Malicious PDF — malware analysis report

Static analysis result for SHA-256 926475b820daaca3…

MALICIOUS

PDF

49.5 KB Created: 2021-05-17 13:07:16 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-27
MD5: d3bd2b0561a7833447bae482ee495eb6 SHA-1: 9b9bdd39f9a86d43962c627f3f43d38578266613 SHA-256: 926475b820daaca35cec023e875f1b543ff356177fdc841b50887e0745a3639e
102 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains numerous embedded URLs and a DOC BODY that explicitly mentions 'free Robux' and 'Coin Master spins', indicating a lure for users. The PDF_SEO_LINK_FARM heuristic confirms a large number of external links, many of which are likely part of a scam or phishing campaign. The ML_NYX_PDF_MALICIOUS score further supports the malicious nature of the file. No scripts were extracted, but the embedded URLs are the primary indicators of malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9349

Heuristics 4

  • 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.
  • 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-generator-game-hack PDF link annotation
    • http://manfeld.dk/images/how-to-get-free-roblox-money_GM431946152.pdfIn PDF document text
    • http://manfeld.dk/images/free-robux-2021-no-human-verification_GM431946152.pdfIn PDF document text
    • http://manfeld.dk/images/easy-roblox-today_GM431946152.pdfIn PDF document text
    • http://manfeld.dk/images/coin-master-daily-free-spins-link-app_GM406889139.pdfIn PDF document text
    • http://manfeld.dk/images/coin-free-spin_GM406889139.pdfIn PDF document text
    • http://manfeld.dk/images/coin-master-free-spins_GM406889139.pdfIn PDF document text
    • http://manfeld.dk/images/free-roblox-executor_GM431946152.pdfIn PDF document text
    • http://manfeld.dk/images/coin-master-hack-tool-v1-9-download_GM406889139.pdfIn PDF document text
    • http://manfeld.dk/images/how-to-generate-free-coin-master-spin_GM406889139.pdfIn PDF document text
    • http://manfeld.dk/images/coin-master-free-spins-link-blogspot-2021_GM406889139.pdfIn PDF document text
    • http://manfeld.dk/images/coin-master-free-spins-apple_GM406889139.pdfIn PDF document text
    • http://manfeld.dk/images/coin-master-free-spins-hack-2021_GM406889139.pdfIn PDF document text
    • http://manfeld.dk/images/moon-active_GM406889139.pdfIn PDF document text
    • http://manfeld.dk/images/coin-master-free-spin-and-trading-group_GM406889139.pdfIn PDF document text
    • http://manfeld.dk/images/how-to-get-robux-on-phone_GM431946152.pdfIn PDF document text
    • http://manfeld.dk/images/free-links-for-free-coins-and-spins-for-coin-master_GM406889139.pdfIn PDF document text
    • http://manfeld.dk/images/coin-master-free-spins-link-today-twitter_GM406889139.pdfIn PDF document text
    • http://manfeld.dk/images/how-to-change-username-on-roblox-for-free_GM431946152.pdfIn PDF document text
    • http://manfeld.dk/images/how-to-get-infinite-robux_GM431946152.pdfIn PDF document text
    • http://manfeld.dk/images/robux-hack-no-verification_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_off0000517a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x517A 27696 bytes
SHA-256: f06e5e79d2685c0b05987a5b6169489b9a82c2fb611b49c29019db8615a553e0
font_01_sfnt_off00008fc8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8FC8 6100 bytes
SHA-256: f866077ce59d6ea276f75e4af76daa2aab5f3a1a679df144776123d85664d65c
font_02_sfnt_off00009e54.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9E54 18512 bytes
SHA-256: 02a745270f20da848e9c9bdefc0721d63769b74524dfc6c51231bae9bb0d5f7b

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