Malicious PDF — malware analysis report

Static analysis result for SHA-256 74543442aaa36668…

MALICIOUS

PDF

33.6 KB Created: 2021-07-10 02:00:34 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-29
MD5: cfc1c43af17fb35deda5f7c2574fd887 SHA-1: 1ac5b07eb47db06b95208a571672859664d96f42 SHA-256: 74543442aaa366681ee63dfb7a7073690745505807d6fed9849af4fd914f49ca
142 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document is designed as a lure, using keywords related to game hacks and free currency to entice users. It contains numerous links to external websites, many of which appear to be part of a link farm or SEO manipulation scheme. The primary URL, http://netcdn.tw/app/479516143/free-private-minecraft-server-game-hack, is likely a redirector to malicious content or a phishing page. While no scripts were explicitly extracted, the structure and numerous external links suggest a malicious workflow aimed at traffic generation or further compromise.

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/free-private-minecraft-server-game-hack PDF link annotation
    • https://privatearrangements.co.nz/public/files/how-to-be-a-hacker-in-roblox-2021_GM431946152.pdfIn PDF document text
    • https://privatearrangements.co.nz/public/files/free-robux-no-human-verification-no-survey_GM431946152.pdfIn PDF document text
    • https://privatearrangements.co.nz/public/files/coin-master-free-download-pc_GM406889139.pdfIn PDF document text
    • https://privatearrangements.co.nz/public/files/free-ways-to-get-robux_GM431946152.pdfIn PDF document text
    • https://privatearrangements.co.nz/public/files/coin-master-levels_GM406889139.pdfIn PDF document text
    • https://privatearrangements.co.nz/public/files/all-twitter-cheat-codes-mad-city-roblox_GM431946152.pdfIn PDF document text
    • https://privatearrangements.co.nz/public/files/roblox-weight-lifting-sim-hack_GM431946152.pdfIn PDF document text
    • https://privatearrangements.co.nz/public/files/coin-master-daily-spin-free_GM406889139.pdfIn PDF document text
    • https://privatearrangements.co.nz/public/files/adopt-me-roblox-hacks_GM431946152.pdfIn PDF document text
    • https://privatearrangements.co.nz/public/files/free-800-robux_GM431946152.pdfIn PDF document text
    • https://privatearrangements.co.nz/public/files/robuxy-com-free-robux_GM431946152.pdfIn PDF document text
    • https://privatearrangements.co.nz/public/files/free-card-codes-roblox-2021-no-survey-no-download_GM431946152.pdfIn PDF document text
    • https://privatearrangements.co.nz/public/files/how-do-you-install-minecraft-for-free_GM479516143.pdfIn PDF document text
    • https://privatearrangements.co.nz/public/files/free-premium-roblox_GM431946152.pdfIn PDF document text
    • https://privatearrangements.co.nz/public/files/free-spins-from-coin-master_GM406889139.pdfIn PDF document text
    • https://privatearrangements.co.nz/public/files/descargar-hack-de-jailbreak-roblox_GM431946152.pdfIn PDF document text
    • https://privatearrangements.co.nz/public/files/roblox-plus-free-robux_GM431946152.pdfIn PDF document text
    • https://privatearrangements.co.nz/public/files/cheats-para-ben-10-universal-showdown-roblox_GM431946152.pdfIn PDF document text
    • https://privatearrangements.co.nz/public/files/hack-roblox-cheat-engine-64-2021_GM431946152.pdfIn PDF document text
    • https://privatearrangements.co.nz/public/files/how-to-hack-roblox-robux-2021-no-survey_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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000030f8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x30F8 22004 bytes
SHA-256: eba6e9658f714b49a15570947a5871b7e6b6c313d793a185bf69f431d427f14c
font_01_sfnt_off00006145.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6145 18124 bytes
SHA-256: 211e11bb03f7cc83c5e2829b7d2ef769d4fa8cb325cdfd6bec5b2a0daef77f26

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