Malicious PDF — malware analysis report

Static analysis result for SHA-256 e6d5de0d588a2d68…

MALICIOUS

PDF

34.3 KB Created: 2021-06-24 08:22:55 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-05
MD5: 32c61cdabfc447bfc620ce6c2a5da438 SHA-1: 48fba50d01b7f7c90e1b02ad9ab1ff889a1c23ae SHA-256: e6d5de0d588a2d68de7668ac87049f000351ea32b07b06de414389789920eb57
142 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF document contains numerous links designed to lure users into clicking on them by promising free game currency or hacks. These links redirect to external sites, including http://netcdn.co/app/431946152/how-to-have-clothe-free-roblox-game-hack, which likely host malicious content or further phishing attempts. The heuristic firings indicate a link farm and a game hack redirect lure, strongly suggesting a phishing or malware distribution campaign.

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.co/app/431946152/how-to-have-clothe-free-roblox-game-hack PDF link annotation
    • https://www.advancissurgical.com/uploads/files/files/free-robux-by-watching-ads_GM431946152.pdfIn PDF document text
    • https://www.advancissurgical.com/uploads/files/files/dress-up-on-roblox-that-are-no-roblox-just-free_GM431946152.pdfIn PDF document text
    • https://www.advancissurgical.com/uploads/files/files/wahoogaming-co-free-robux_GM431946152.pdfIn PDF document text
    • https://www.advancissurgical.com/uploads/files/files/how-to-get-free-shields-on-coin-master_GM406889139.pdfIn PDF document text
    • https://www.advancissurgical.com/uploads/files/files/roblox-accounts-for-sale-free_GM431946152.pdfIn PDF document text
    • https://www.advancissurgical.com/uploads/files/files/hack-coin-master-2021_GM406889139.pdfIn PDF document text
    • https://www.advancissurgical.com/uploads/files/files/coin-master-free-spins-hacktman_GM406889139.pdfIn PDF document text
    • https://www.advancissurgical.com/uploads/files/files/how-to-get-free-robux-no-verification-2021_GM431946152.pdfIn PDF document text
    • https://www.advancissurgical.com/uploads/files/files/games-that-give-you-free-robux_GM431946152.pdfIn PDF document text
    • https://www.advancissurgical.com/uploads/files/files/master-coin-master-free-spin_GM406889139.pdfIn PDF document text
    • https://www.advancissurgical.com/uploads/files/files/coin-master-hack-pc-download_GM406889139.pdfIn PDF document text
    • https://www.advancissurgical.com/uploads/files/files/where-to-buy-pubg-uc_GM1330123889.pdfIn PDF document text
    • https://www.advancissurgical.com/uploads/files/files/coin-master-free-spin-and-coins-links-2021_GM406889139.pdfIn PDF document text
    • https://www.advancissurgical.com/uploads/files/files/coin-master-heaven-daily-free-spins-link-today_GM406889139.pdfIn PDF document text
    • https://www.advancissurgical.com/uploads/files/files/comment-avoir-robux-gratuit-2021-sur-pc-facilement-free_GM431946152.pdfIn PDF document text
    • https://www.advancissurgical.com/uploads/files/files/roblox-robux-cheat-no-human-verification_GM431946152.pdfIn PDF document text
    • https://www.advancissurgical.com/uploads/files/files/how-to-get-minecraft-for-free-on-iphone_GM479516143.pdfIn PDF document text
    • https://www.advancissurgical.com/uploads/files/files/how-to-hack-in-roblox-prison-life_GM431946152.pdfIn PDF document text
    • https://www.advancissurgical.com/uploads/files/files/free-spin-coin-master-app-download_GM406889139.pdfIn PDF document text
    • https://www.advancissurgical.com/uploads/files/files/how-to-hack-minecraft-pe_GM479516143.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_off00002eb3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2EB3 22404 bytes
SHA-256: 4d71004c7263db11b82c6e12cd68e5127d34df787a7942eec3e005bb982070ff
font_01_sfnt_off0000605c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x605C 19200 bytes
SHA-256: becbab1d105a4d601c3eb46d04c7d5d6991a79c246b7f75d41d573fdbff1f94e

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