Malicious PDF — malware analysis report

Static analysis result for SHA-256 7abb3b78ea0da711…

MALICIOUS

PDF

34.0 KB Created: 2021-07-03 14:45:22 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-05
MD5: b70530665415f393fcf905dd8c396506 SHA-1: e85c44d217f0495e60d99ebe63db3237809601f0 SHA-256: 7abb3b78ea0da711ae9e74a16f94ec2116ff9f47348ae87c2a38fe01253608a1
182 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document employs a game hack lure to direct users to a series of external links, many of which point to other PDFs. This behavior is indicative of a link farm or phishing campaign designed to distribute further malicious content or harvest credentials. The presence of multiple game-related lures suggests a broad targeting strategy.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

Heuristics 6

  • 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.
  • Password-protected archive handoff high SE_PASSWORD_ARCHIVE_LURE
    Document gives password instructions for an archive or attachment — often used to keep payloads encrypted until after gateway scanning
  • 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/431946152/roblox-login-hack-game-hack PDF link annotation
    • http://daskrimti-jabar.web.id/library/repository/free-robux-hack-no-verification_GM431946152.pdfIn PDF document text
    • http://daskrimti-jabar.web.id/library/repository/how-to-get-games-for-free-on-roblox_GM431946152.pdfIn PDF document text
    • http://daskrimti-jabar.web.id/library/repository/free-robux-no-password-needed_GM431946152.pdfIn PDF document text
    • http://daskrimti-jabar.web.id/library/repository/roblox-power-simulator-cheats_GM431946152.pdfIn PDF document text
    • http://daskrimti-jabar.web.id/library//repository/robux-fun-hack_GM431946152.pdfIn PDF document text
    • http://daskrimti-jabar.web.id/library//repository/free-robux-scam_GM431946152.pdfIn PDF document text
    • http://daskrimti-jabar.web.id/library/repository/how-do-you-hack-roblox-jailbreak_GM431946152.pdfIn PDF document text
    • http://daskrimti-jabar.web.id/library/repository/coin-master-links-for-free-spins-2021_GM406889139.pdfIn PDF document text
    • http://daskrimti-jabar.web.id/library/repository/coin-master-links-free-spins_GM406889139.pdfIn PDF document text
    • http://daskrimti-jabar.web.id/library/repository/games-like-coin-master_GM406889139.pdfIn PDF document text
    • http://daskrimti-jabar.web.id/library//repository/how-to-get-free-stuff-on-roblox-2021_GM431946152.pdfIn PDF document text
    • http://daskrimti-jabar.web.id/library//repository/coin-master-free-spins-link-blogspot-2021_GM406889139.pdfIn PDF document text
    • http://daskrimti-jabar.web.id/library/repository/coin-master-hack_GM406889139.pdfIn PDF document text
    • http://daskrimti-jabar.web.id/library/repository/how-to-create-clan-in-roblox-for-free_GM431946152.pdfIn PDF document text
    • http://daskrimti-jabar.web.id/library//repository/free-spin-coin-master-apk_GM406889139.pdfIn PDF document text
    • http://daskrimti-jabar.web.id/library//repository/mc-update_GM479516143.pdfIn PDF document text
    • http://daskrimti-jabar.web.id/library//repository/actual-free-robux_GM431946152.pdfIn PDF document text
    • http://daskrimti-jabar.web.id/library/repository/pet-simulator-roblox-gold-chest-hack_GM431946152.pdfIn PDF document text
    • http://daskrimti-jabar.web.id/library/repository/codes-to-get-free-robux_GM431946152.pdfIn PDF document text
    • http://daskrimti-jabar.web.id/library/repository/how-to-get-100-free-spins-on-coin-master_GM406889139.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_off00002ec9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2EC9 22372 bytes
SHA-256: 3f962126e59f33e1b365c1405675a03d21f1665ea8c5896d3468d996c7fa379c
font_01_sfnt_off00006074.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6074 18776 bytes
SHA-256: 715907ad5ec2a296fd3a214c8d873825c0660b28106febf88871b482b0f90582

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