Malicious PDF — malware analysis report

Static analysis result for SHA-256 c43591f556bb194c…

MALICIOUS

PDF

46.4 KB Created: 2021-05-11 14:32:02 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-05
MD5: 2f8310721e9b828a3e69fdbca161ac9a SHA-1: 6781e1356491bbdc06a437e9387634f948f03c26 SHA-256: c43591f556bb194c3c4ecc25f6661b2b8def42ddf1dd71e3fe9442557250c8c8
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document was flagged as malicious by an ML classifier. The file routes users through malicious redirector infrastructure and presents a deceptive download button. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8948

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.xyz/app/431946152/how-to-change-your-name-in-roblox-for-free-game-hack PDF link annotation
    • http://bildhauerei-roerig.de/images/how-do-you-get-free-robux-on-roblox_GM431946152.pdfIn PDF document text
    • http://bildhauerei-roerig.de/images/websites-that-give-free-robux_GM431946152.pdfIn PDF document text
    • http://bildhauerei-roerig.de/images/coin-master-cards-hack_GM406889139.pdfIn PDF document text
    • http://bildhauerei-roerig.de/images/best-free-hacked-client_GM479516143.pdfIn PDF document text
    • http://bildhauerei-roerig.de/images/minecraft-apk-free-download_GM479516143.pdfIn PDF document text
    • http://bildhauerei-roerig.de/images/coin-master-game-hunter_GM406889139.pdfIn PDF document text
    • http://bildhauerei-roerig.de/images/get-free-spins-link-in-coin-master_GM406889139.pdfIn PDF document text
    • http://bildhauerei-roerig.de/images/free-coin-master-spins_GM406889139.pdfIn PDF document text
    • http://bildhauerei-roerig.de/images/free-outfits-roblox_GM431946152.pdfIn PDF document text
    • http://bildhauerei-roerig.de/images/free-robux-gift-card_GM431946152.pdfIn PDF document text
    • http://bildhauerei-roerig.de/images/coin-master-hack-download-2021_GM406889139.pdfIn PDF document text
    • http://bildhauerei-roerig.de/images/master-coin-free-spin-daily_GM406889139.pdfIn PDF document text
    • http://bildhauerei-roerig.de/images/coin-master-free-link-facebook_GM406889139.pdfIn PDF document text
    • http://bildhauerei-roerig.de/images/roblox-royale-high-diamond-hack_GM431946152.pdfIn PDF document text
    • http://bildhauerei-roerig.de/images/how-to-get-free-robux-hack_GM431946152.pdfIn PDF document text
    • http://bildhauerei-roerig.de/images/coin-master-hack-mod-apk-download_GM406889139.pdfIn PDF document text
    • http://bildhauerei-roerig.de/images/coin-master-free-spins-link-cheat_GM406889139.pdfIn PDF document text
    • http://bildhauerei-roerig.de/images/link-for-free-spins-on-coin-master_GM406889139.pdfIn PDF document text
    • http://bildhauerei-roerig.de/images/coin-master-hack-2021-ios_GM406889139.pdfIn PDF document text
    • http://bildhauerei-roerig.de/images/60-free-spins-coin-master_GM406889139.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_003_off00004a6a.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4A6A 25092 bytes
SHA-256: 4e89fac0dfa5859293511ea71261628b034f3499f531f1b277b5050d5fc21871
font_01_sfnt_off000084bd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x84BD 3400 bytes
SHA-256: 4b3e0f36ad1e0c7e3ea5c178fd2b4f097d1e01575fc6a4101a8b520db34dfe07
font_02_sfnt_off00008fe7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8FE7 19356 bytes
SHA-256: f5fa8051516efdb430215c32221800eb8c82dc03f6476ac338efe693dcbf881c

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