Malicious PDF — malware analysis report

Static analysis result for SHA-256 186948644c91467c…

MALICIOUS

PDF

34.6 KB Created: 2021-07-04 10:35:02 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-18
MD5: 9e19f46d4866e9fbf2d9948dfb1f725d SHA-1: a9c4a581410b69d88a48fba13e800bcd8140553b SHA-256: 186948644c91467c03f8d5c230804b7c099a8926183c64bad1e23d4b322fd4e6
182 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous links to websites offering game hacks and cheats, a common lure for malware distribution. The heuristic 'PDF_SEO_LINK_FARM' indicates a large number of such links, suggesting a malicious intent to drive traffic to potentially harmful sites. The presence of a 'download button' lure and instructions for password-protected archives further supports a malicious workflow aimed at tricking users into downloading and decrypting malware.

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/479516143/minecraft-apk-114-game-hack PDF link annotation
    • http://daskrimti-jabar.web.id/library/repository/roblox-hack-that-lets-you-swear_GM431946152.pdfIn PDF document text
    • http://daskrimti-jabar.web.id/library//repository/free-shields-coin-master_GM406889139.pdfIn PDF document text
    • http://daskrimti-jabar.web.id/library/repository/how-to-get-free-robux-no-survey-2021_GM431946152.pdfIn PDF document text
    • http://daskrimti-jabar.web.id/library/repository/roblox-hack-me_GM431946152.pdfIn PDF document text
    • http://daskrimti-jabar.web.id/library/repository/coin-master-rare-cards-hack_GM406889139.pdfIn PDF document text
    • http://daskrimti-jabar.web.id/library/repository/free-catalog-roblox-java-script_GM431946152.pdfIn PDF document text
    • http://daskrimti-jabar.web.id/library/repository/how-to-hack-any-account-password-roblox_GM431946152.pdfIn PDF document text
    • http://daskrimti-jabar.web.id/library/repository/free-spins-for-coin-master-2021_GM406889139.pdfIn PDF document text
    • http://daskrimti-jabar.web.id/library//repository/how-you-get-free-robux_GM431946152.pdfIn PDF document text
    • http://daskrimti-jabar.web.id/library//repository/free-robux-generator-no-survey-no-download-no-human-verification_GM431946152.pdfIn PDF document text
    • http://daskrimti-jabar.web.id/library/repository/free-2021-roblox-account_GM431946152.pdfIn PDF document text
    • http://daskrimti-jabar.web.id/library/repository/roblox-free-robux-deutsch_GM431946152.pdfIn PDF document text
    • http://daskrimti-jabar.web.id/library/repository/coin-master-hack-ios-download-2021_GM406889139.pdfIn PDF document text
    • http://daskrimti-jabar.web.id/library//repository/websites-to-get-free-robux_GM431946152.pdfIn PDF document text
    • http://daskrimti-jabar.web.id/library/repository/free-roblox-items-codes_GM431946152.pdfIn PDF document text
    • http://daskrimti-jabar.web.id/library/repository/mc-the-miner-freee-robux-hack_GM431946152.pdfIn PDF document text
    • http://daskrimti-jabar.web.id/library/repository/free-spins-coin-master-2021-today_GM406889139.pdfIn PDF document text
    • http://daskrimti-jabar.web.id/library/repository/roblox-retail-tycoon-money-cheat-engine_GM431946152.pdfIn PDF document text
    • http://daskrimti-jabar.web.id/library/repository/free-robux-2021-no-human-verification_GM431946152.pdfIn PDF document text
    • http://daskrimti-jabar.web.id/library/repository/free-800-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_off0000314f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x314F 22772 bytes
SHA-256: 5e732033a0828bc852fd2c5969137aec5aeacbd226e1bf7225ef3b2d4a7a2a13
font_01_sfnt_off00006454.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6454 18372 bytes
SHA-256: cfa1744e15de76beef4250e2e8e5213b12ebb5623f2a1aca1772815b9c3f87cb

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