Malicious PDF — malware analysis report

Static analysis result for SHA-256 cd66dc43d6826d77…

MALICIOUS

PDF

35.4 KB Created: 2021-07-03 12:30:03 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-29
MD5: d8eddcfddb7dbf198d797b40bb7631fb SHA-1: 1611dc54d9a5290796dd775dae9ef91f148d4f4a SHA-256: cd66dc43d6826d777dbb4fdbdc5c751e44546ff36288213957c6f301636a07ee
142 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document acts as a lure, directing users to download game hacks and cheats via numerous embedded links. The heuristic 'PDF_SEO_LINK_FARM' indicates a large number of external links, many of which are SEO-optimized PDF files, suggesting a link farm designed to attract traffic. The primary URL http://netcdn.tw/app/479516143/minecraft-pe-016-0-apk-download-free-game-hack is a direct link to a purported game hack download.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

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 http://netcdn.tw/app/479516143/minecraft-pe-016-0-apk-download-free-game-hack PDF link annotation
    • https://amazingnepaljourney.com/userfiles/files/roblox-hack-robux-download-free-pc_GM431946152.pdfIn PDF document text
    • https://amazingnepaljourney.com/userfiles/files/coin-master-free-cards-and-spin-link_GM406889139.pdfIn PDF document text
    • https://amazingnepaljourney.com/userfiles/files/coin-master-hacks-iphone_GM406889139.pdfIn PDF document text
    • https://amazingnepaljourney.com/userfiles/files/tower-of-hell-roblox-hack_GM431946152.pdfIn PDF document text
    • https://amazingnepaljourney.com/userfiles/files/roblox-no-download-hack_GM431946152.pdfIn PDF document text
    • https://amazingnepaljourney.com/userfiles/files/coin-master-hack-for-ios_GM406889139.pdfIn PDF document text
    • https://amazingnepaljourney.com/userfiles/files/how-to-hack-roblox-accounts-2021-easy_GM431946152.pdfIn PDF document text
    • https://amazingnepaljourney.com/userfiles/files/coin-master-free-spins-and-coins-today_GM406889139.pdfIn PDF document text
    • https://amazingnepaljourney.com/userfiles/files/minecraft-windows-10-free-with-java_GM479516143.pdfIn PDF document text
    • https://amazingnepaljourney.com/userfiles/files/how-to-hack-pizza-place-roblox-2021_GM431946152.pdfIn PDF document text
    • https://amazingnepaljourney.com/userfiles/files/how-to-get-free-robux-on-chromebook_GM431946152.pdfIn PDF document text
    • https://amazingnepaljourney.com/userfiles/files/coin-master-daily-free-spins-link-download_GM406889139.pdfIn PDF document text
    • https://amazingnepaljourney.com/userfiles/files/claim-free-robux-button_GM431946152.pdfIn PDF document text
    • https://amazingnepaljourney.com/userfiles/files/i-need-more-free-spins-on-coin-master_GM406889139.pdfIn PDF document text
    • https://amazingnepaljourney.com/userfiles/files/coin-master-free-coins-hack_GM406889139.pdfIn PDF document text
    • https://amazingnepaljourney.com/userfiles/files/free-premium-roblox_GM431946152.pdfIn PDF document text
    • https://amazingnepaljourney.com/userfiles/files/roblox-fly-hack-cheat-engine-2021_GM431946152.pdfIn PDF document text
    • https://amazingnepaljourney.com/userfiles/files/free-spins-coin-master-hack-2021_GM406889139.pdfIn PDF document text
    • https://amazingnepaljourney.com/userfiles/files/how-to-get-robux-for-free-2021-without-human-verification_GM431946152.pdfIn PDF document text
    • https://amazingnepaljourney.com/userfiles/files/watch-ads-for-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
font_00_sfnt_off00003307.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x3307 22284 bytes
SHA-256: 4e7aada18626b122ae815a2df607cd49139a6918a674a36caa584abd766d11c1
font_01_sfnt_off000063fa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x63FA 19524 bytes
SHA-256: 2c1b2724e9f8d24eaf424e37f542e22724de6abfb49ca65165bfe174736ddb84

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