Malicious PDF — malware analysis report

Static analysis result for SHA-256 5c7e98c6a4fd30dd…

MALICIOUS

PDF

48.2 KB Created: 2021-05-14 02:31:38 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-05
MD5: ff34345a6c4938712c4c6176d85db3fa SHA-1: f0d5a5643260d870f43e1640779290f9dffd5a37 SHA-256: 5c7e98c6a4fd30ddd52b8d7ce381d7c30e508c401fa58e68d34ba00f77615ee8
142 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document employs a lure of 'free Robux' and game hacks to entice users. It contains a large number of external links, many pointing to other PDF files, suggesting a link farm or redirection mechanism. The primary URL identified, https://netcdn.xyz/app/431946152/free-robux-today-game-hack, is likely the initial entry point to this network of malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9977

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-today-game-hack PDF link annotation
    • https://wandersuechtig.de/images/how-to-get-free-robux-on-phone_GM431946152.pdfIn PDF document text
    • https://wandersuechtig.de/images/coin-master-links-free-spins_GM406889139.pdfIn PDF document text
    • https://wandersuechtig.de/images/free-robux-generator-for-roblox-2021_GM431946152.pdfIn PDF document text
    • https://wandersuechtig.de/images/free-apk-mod-coin-master_GM406889139.pdfIn PDF document text
    • https://wandersuechtig.de/images/coin-master-links-for-free-spins_GM406889139.pdfIn PDF document text
    • https://wandersuechtig.de/images/coin-master-hack-lost-world-2021_GM406889139.pdfIn PDF document text
    • https://wandersuechtig.de/images/ways-to-get-robux_GM431946152.pdfIn PDF document text
    • https://wandersuechtig.de/images/minecraft-pocket-edition-free-ios_GM479516143.pdfIn PDF document text
    • https://wandersuechtig.de/images/free-robux-redeem-codes_GM431946152.pdfIn PDF document text
    • https://wandersuechtig.de/images/get-gold-coin-master-village-hack_GM406889139.pdfIn PDF document text
    • https://wandersuechtig.de/images/haktuts-coin-master_GM406889139.pdfIn PDF document text
    • https://wandersuechtig.de/images/free-pet-food-for-coin-master_GM406889139.pdfIn PDF document text
    • https://wandersuechtig.de/images/how-to-get-free-robux-easy-no-download_GM431946152.pdfIn PDF document text
    • https://wandersuechtig.de/images/free-robux-no-verification-at-all_GM431946152.pdfIn PDF document text
    • https://wandersuechtig.de/images/roblox-hack-download-pc_GM431946152.pdfIn PDF document text
    • https://wandersuechtig.de/images/coin-master-fan-page-giveaway_GM406889139.pdfIn PDF document text
    • https://wandersuechtig.de/images/get-free-robux-com_GM431946152.pdfIn PDF document text
    • https://wandersuechtig.de/images/can-i-download-minecraft-for-free_GM479516143.pdfIn PDF document text
    • https://wandersuechtig.de/images/how-to-get-free-roebucks-on-roblox_GM431946152.pdfIn PDF document text
    • https://wandersuechtig.de/images/free-robux-no-anti-bot-verification_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
font_00_sfnt_off0000482a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x482A 38024 bytes
SHA-256: 795cbd0b3d013d98c0362a7f732b857088e5c42a222dbfa6a9167c6178d36ef5
font_01_sfnt_off000099ad.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x99AD 18596 bytes
SHA-256: 123b3c01001442c78a22a4b95c046930f1463c344676a890e106be4cc216f6f4

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