Malicious PDF — malware analysis report

Static analysis result for SHA-256 864c192addf082ac…

MALICIOUS

PDF

35.5 KB Created: 2021-07-04 08:41:20 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-18
MD5: 49ac1cbdc7056973628d1324dc634cd3 SHA-1: aba89cff5b8614996ab91e7f346bef91113ac141 SHA-256: 864c192addf082ac3aec5f7ba6e105aa49b1354d5aca6ac4b34a7234a6f86c7d
142 Risk Score

Malware Insights

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

This PDF document was flagged as malicious by an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm, routes users through malicious redirector infrastructure and presents a deceptive download button. Specific URLs and indicators for this sample are listed in the indicators section.

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/how-to-get-free-stuff-on-roblox-2021-game-hack PDF link annotation
    • https://new-era.com.tw/image/data/files/get-more-robux_GM431946152.pdfIn PDF document text
    • https://new-era.com.tw/image/data/files/how-to-get-free-robux-for-kids_GM431946152.pdfIn PDF document text
    • http://new-era.com.tw/image/data/files/how-do-u-get-free-robux-2021_GM431946152.pdfIn PDF document text
    • http://new-era.com.tw/image/data/files/hack-roblox-in-game_GM431946152.pdfIn PDF document text
    • http://new-era.com.tw/image/data/files/download-hacked-games-coin-master_GM406889139.pdfIn PDF document text
    • http://new-era.com.tw/image/data/files/how-to-get-coin-master-free-spin-link_GM406889139.pdfIn PDF document text
    • http://new-era.com.tw/image/data/files/omplete-surveys-for-coin-master-free-spins_GM406889139.pdfIn PDF document text
    • https://new-era.com.tw/image/data/files/how-to-get-free-robux-no-human-verification-2021_GM431946152.pdfIn PDF document text
    • https://new-era.com.tw/image/data/files/how-to-change-my-username-on-roblox-for-free_GM431946152.pdfIn PDF document text
    • https://new-era.com.tw/image/data/files/coin-master-hack-no-human-verification-2021_GM406889139.pdfIn PDF document text
    • http://new-era.com.tw/image/data/files/earn-robux-sites_GM431946152.pdfIn PDF document text
    • http://new-era.com.tw/image/data/files/coin-master-free-link-blogspot_GM406889139.pdfIn PDF document text
    • https://new-era.com.tw/image/data/files/is-minecraft-java-edition-free_GM479516143.pdfIn PDF document text
    • https://new-era.com.tw/image/data/files/coin-master-2021-free-spins-link-2021_GM406889139.pdfIn PDF document text
    • https://new-era.com.tw/image/data/files/free-free-robux_GM431946152.pdfIn PDF document text
    • https://new-era.com.tw/image/data/files/hacks-arsenal-roblox-tampermonkey_GM431946152.pdfIn PDF document text
    • http://new-era.com.tw/image/data/files/coin-master-hack-to-get-free-spins_GM406889139.pdfIn PDF document text
    • https://new-era.com.tw/image/data/files/how-to-hack-roblox-using-dll_GM431946152.pdfIn PDF document text
    • https://new-era.com.tw/image/data/files/coin-master-hack-apk-iphone_GM406889139.pdfIn PDF document text
    • https://new-era.com.tw/image/data/files/free-coins-and-spins-for-coin-master_GM406889139.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_off00003183.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x3183 22720 bytes
SHA-256: 048f0cf56a76c99749fb1406f625294b88d79005e9e270893df241920e68c81c
font_01_sfnt_off0000642c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x642C 19460 bytes
SHA-256: 8426f038795ea5d8a795bf0375a678dc031ed66a2a703316a826a74a76c6ece6

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