Malicious PDF — malware analysis report

Static analysis result for SHA-256 3708de250d57aaad…

MALICIOUS

PDF

34.3 KB Created: 2021-07-05 22:01:53 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-29
MD5: 2e78dd74fd7b1eb96d4e5206f2ab785b SHA-1: 71270eb1b297b446ecaeadbee46a5c126501c7ec SHA-256: 3708de250d57aaad1b33b40bea4c125ea6b121b58252eac11fb61a4ae41f3aee
142 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains multiple heuristics indicating it's part of a link farm, specifically luring users with 'game hack' and 'free generator' themes. The document body and extracted URLs point to external sites that host numerous other PDFs, suggesting a coordinated effort to generate traffic or manipulate search results. The primary lure is the promise of in-game currency or hacks, a common social engineering tactic.

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/431946152/oprewards-com-earn-game-hack PDF link annotation
    • http://wadimor.co.id/media/imagesfiles/how-to-get-free-robux-no-scam_GM431946152.pdfIn PDF document text
    • http://wadimor.co.id/media/imagesfiles/roblox-murder-mystery-2-modded-free-admin_GM431946152.pdfIn PDF document text
    • http://wadimor.co.id/media/imagesfiles/roblox-how-to-change-your-username-for-free-2021_GM431946152.pdfIn PDF document text
    • http://wadimor.co.id/media/imagesfiles/robux-com-free_GM431946152.pdfIn PDF document text
    • http://wadimor.co.id/media/imagesfiles/roblox-hack-no-survey-or-human-verification_GM431946152.pdfIn PDF document text
    • http://wadimor.co.id/media/imagesfiles/roblox-javascript-hack_GM431946152.pdfIn PDF document text
    • http://wadimor.co.id/media/imagesfiles/how-to-get-free-robux-on-roblox-in-2021-pycksel_GM431946152.pdfIn PDF document text
    • http://wadimor.co.id/media/imagesfiles/secret-robux-hack-revealed-free-robux-generator_GM431946152.pdfIn PDF document text
    • http://wadimor.co.id/media/imagesfiles/how-to-get-free-robux-in-2021_GM431946152.pdfIn PDF document text
    • http://wadimor.co.id/media/imagesfiles/minecraft-bedrock-edition-free-with-java_GM479516143.pdfIn PDF document text
    • http://wadimor.co.id/media/imagesfiles/roblox-i-got-this-shirt-for-free_GM431946152.pdfIn PDF document text
    • http://wadimor.co.id/media/imagesfiles/how-to-get-free-followers-on-roblox_GM431946152.pdfIn PDF document text
    • http://wadimor.co.id/media/imagesfiles/pubg-uc-free-online_GM1330123889.pdfIn PDF document text
    • http://wadimor.co.id/media/imagesfiles/cheate-pour-roblox_GM431946152.pdfIn PDF document text
    • http://wadimor.co.id/media/imagesfiles/free-robux-hack-us_GM431946152.pdfIn PDF document text
    • http://wadimor.co.id/media/imagesfiles/how-to-get-free-stuff-on-roblox-catalog-on-phone_GM431946152.pdfIn PDF document text
    • http://wadimor.co.id/media/imagesfiles/how-to-get-free-robux-really-works-easy_GM431946152.pdfIn PDF document text
    • http://wadimor.co.id/media/imagesfiles/how-to-hack-a-account-roblox-v3rm_GM431946152.pdfIn PDF document text
    • http://wadimor.co.id/media/imagesfiles/free-good-roblox-exploit_GM431946152.pdfIn PDF document text
    • http://wadimor.co.id/media/imagesfiles/ultimate-free-robux-generator_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_off00003024.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x3024 22232 bytes
SHA-256: 4abc409155ce60041496a95ac7b4e502c0f55da7b64cdbc5cd1aaf29318a7245
font_01_sfnt_off000061a7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x61A7 18820 bytes
SHA-256: 98371626da931bbeb902ee9c6a395854158c625b387237cb0e05488af2fd1844

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