Malicious PDF — malware analysis report

Static analysis result for SHA-256 d298f32a5617179a…

MALICIOUS

PDF

48.2 KB Created: 2021-06-08 22:05:35 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-25
MD5: 52ab17bf52e16a3bf93e0e0bf21d3c14 SHA-1: 18ca4879e24fe03f281af3528168b6a7b6d3eb25 SHA-256: d298f32a5617179a4c9eca6629b80f3ac113865affe42c08db61a8ac603a00cf
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 0.9796

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 https://netcdn.tw/app/431946152/free-tix-on-roblox-2021-game-hack PDF link annotation
    • https://new-era.com.tw/image/data/files/robux-apk_GM431946152.pdfIn PDF document text
    • https://new-era.com.tw/image/data/files/como-hackear-el-juego-coin-master_GM406889139.pdfIn PDF document text
    • http://new-era.com.tw/image/data/files/free-pet-food-for-coin-master_GM406889139.pdfIn PDF document text
    • http://new-era.com.tw/image/data/files/why-pubg-uc-is-expensive_GM1330123889.pdfIn PDF document text
    • https://new-era.com.tw/image/data/files/coin-master-hack-apk-download-2021_GM406889139.pdfIn PDF document text
    • https://new-era.com.tw/image/data/files/is-minecraft-free_GM479516143.pdfIn PDF document text
    • http://new-era.com.tw/image/data/files/coin-master-free-spins-link-download-hack_GM406889139.pdfIn PDF document text
    • https://new-era.com.tw/image/data/files/roblox-free-body_GM431946152.pdfIn PDF document text
    • https://new-era.com.tw/image/data/files/minecraft-free-apk-download-016-0_GM479516143.pdfIn PDF document text
    • https://new-era.com.tw/image/data/files/free-robux-no-human-verification_GM431946152.pdfIn PDF document text
    • http://new-era.com.tw/image/data/files/coin-master-hack-september-2021_GM406889139.pdfIn PDF document text
    • http://new-era.com.tw/image/data/files/how-to-get-free-spins-on-coin-master-2021_GM406889139.pdfIn PDF document text
    • https://new-era.com.tw/image/data/files/free-items-in-roblox-catalog-working-2021_GM431946152.pdfIn PDF document text
    • http://new-era.com.tw/image/data/files/free-coin-master-spins-2021_GM406889139.pdfIn PDF document text
    • https://new-era.com.tw/image/data/files/how-to-get-free-coins-in-minecraft_GM479516143.pdfIn PDF document text
    • http://new-era.com.tw/image/data/files/roblox-high-school-for-free-to-play_GM431946152.pdfIn PDF document text
    • http://new-era.com.tw/image/data/files/roblox-rape-hack_GM431946152.pdfIn PDF document text
    • https://new-era.com.tw/image/data/files/free-robux-that-actually-works_GM431946152.pdfIn PDF document text
    • http://new-era.com.tw/image/data/files/roblox-free-play-no-download_GM431946152.pdfIn PDF document text
    • http://new-era.com.tw/image/data/files/how-many-levels-in-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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000050c8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x50C8 26320 bytes
SHA-256: 8bd854d89975577cfb069e03a08340f9838b037229733f7881883bc9304777b5
font_01_sfnt_off00008e0a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8E0A 3400 bytes
SHA-256: 4b3e0f36ad1e0c7e3ea5c178fd2b4f097d1e01575fc6a4101a8b520db34dfe07
font_02_sfnt_off00009934.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9934 18468 bytes
SHA-256: 7cf4cdc597cd8508a675a0e8383b054471b0d9457387a7f69685a2b03cff3a83

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