Malicious PDF — malware analysis report

Static analysis result for SHA-256 a11eab21b0e1a463…

MALICIOUS

PDF

42.7 KB Created: 2021-05-14 06:51:49 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-17
MD5: 62735c9733c6366a4c781daedab0b66b SHA-1: 62c9fe0cec6dae26a6ec785ab2b005cfd69caaa4 SHA-256: a11eab21b0e1a46323bc282fbe3f4e8d45a36a75c3692a65363f99b2fe8c99ce
142 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document employs a common lure of 'free game hacks' to entice users. It contains a large number of embedded links pointing to other PDF files, suggesting a link farm or redirection mechanism designed to lead users to potentially malicious content. The primary URL, https://netcdn.xyz/app/431946152/free-robux-accounts-2021-game-hack, is a key indicator of this campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9971

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/free-robux-accounts-2021-game-hack PDF link annotation
    • http://fradiomas.com/images/free-robux-no-gift-card_GM431946152.pdfIn PDF document text
    • http://fradiomas.com/images/how-do-you-hack-roblox_GM431946152.pdfIn PDF document text
    • http://fradiomas.com/images/coin-master-free-spins-link-2021_GM406889139.pdfIn PDF document text
    • http://fradiomas.com/images/coin-master-hack-2021-apk-download_GM406889139.pdfIn PDF document text
    • http://fradiomas.com/images/coin-master-free-pet-food-links_GM406889139.pdfIn PDF document text
    • http://fradiomas.com/images/clean-master-hack-coins_GM406889139.pdfIn PDF document text
    • http://fradiomas.com/images/coin-master-daily-free-spins-link-2021_GM406889139.pdfIn PDF document text
    • http://fradiomas.com/images/free-gold-cards-coin-master_GM406889139.pdfIn PDF document text
    • http://fradiomas.com/images/free-vip-roblox_GM431946152.pdfIn PDF document text
    • http://fradiomas.com/images/robux-link_GM431946152.pdfIn PDF document text
    • http://fradiomas.com/images/free-robux-promo-codes-2021_GM431946152.pdfIn PDF document text
    • http://fradiomas.com/images/minecraft-ps4-code-free_GM479516143.pdfIn PDF document text
    • http://fradiomas.com/images/how-to-robux_GM431946152.pdfIn PDF document text
    • http://fradiomas.com/images/www-cheatsk-com-coin-master-hack_GM406889139.pdfIn PDF document text
    • http://fradiomas.com/images/earn-free-robux-for-roblox_GM431946152.pdfIn PDF document text
    • http://fradiomas.com/images/free-roblox-hair-codes_GM431946152.pdfIn PDF document text
    • http://fradiomas.com/images/link-for-free-spins-on-coin-master_GM406889139.pdfIn PDF document text
    • http://fradiomas.com/images/how-to-get-free-clothes-on-roblox-2021_GM431946152.pdfIn PDF document text
    • http://fradiomas.com/images/collect-free-spin-linms-coin-master_GM406889139.pdfIn PDF document text
    • http://fradiomas.com/images/easy-how-to-get-free-robux_GM431946152.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_003_off00004a04.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4A04 25332 bytes
SHA-256: 5189e12ea6ed0451aa4e79bdd74807de3700f65475ad49a0882b447e7c26f072
font_01_sfnt_off000083b9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x83B9 18520 bytes
SHA-256: 56624e41a965b33e02442574776651ebbc56d14fd3e4bfe95c3ae0db26e97c49

Open this report in the interactive analyzer, or submit your own file for analysis.