Malicious PDF — malware analysis report

Static analysis result for SHA-256 ed85b154c931ba84…

MALICIOUS

PDF

34.6 KB Created: 2021-07-04 14:54:59 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-25
MD5: f5cac22189ddaa6b4effb5d1450bdb3c SHA-1: 14bdedb352e31d5ca82ba3aa6250478de204f089 SHA-256: ed85b154c931ba840d948d9c38bd70acf70738d7e7ce96fb1a89926ea7c4abb5
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/406889139/coin-master-100-spin-game-hack PDF link annotation
    • http://new-era.com.tw/image/data/files/free-tiktok-followers-quick-and-easy_GM835599320.pdfIn PDF document text
    • https://new-era.com.tw/image/data/files/coin-master-34-4-hack_GM406889139.pdfIn PDF document text
    • http://new-era.com.tw/image/data/files/free-robux-no-survey_GM431946152.pdfIn PDF document text
    • https://new-era.com.tw/image/data/files/v3rmillion-roblox-exploits-noclip-free_GM431946152.pdfIn PDF document text
    • http://new-era.com.tw/image/data/files/software-for-cheat-engin-66-to-not-make-roblox-carsh_GM431946152.pdfIn PDF document text
    • https://new-era.com.tw/image/data/files/is-there-a-free-version-of-minecraft_GM479516143.pdfIn PDF document text
    • https://new-era.com.tw/image/data/files/coin-master-fan-page-facebook_GM406889139.pdfIn PDF document text
    • https://new-era.com.tw/image/data/files/is-there-an-actual-hack-that-work-for-coin-master_GM406889139.pdfIn PDF document text
    • http://new-era.com.tw/image/data/files/how-to-hack-coin-master-computer_GM406889139.pdfIn PDF document text
    • https://new-era.com.tw/image/data/files/roblox-speed-hack-script_GM431946152.pdfIn PDF document text
    • https://new-era.com.tw/image/data/files/synapse-roblox-free-download_GM431946152.pdfIn PDF document text
    • http://new-era.com.tw/image/data/files/robux-and-tix-hack-2021_GM431946152.pdfIn PDF document text
    • http://new-era.com.tw/image/data/files/coin-master-hack-no-download_GM406889139.pdfIn PDF document text
    • https://new-era.com.tw/image/data/files/roblox-hack-me_GM431946152.pdfIn PDF document text
    • http://new-era.com.tw/image/data/files/how-to-get-free-minecraft-coins_GM479516143.pdfIn PDF document text
    • https://new-era.com.tw/image/data/files/free-robux-link_GM431946152.pdfIn PDF document text
    • https://new-era.com.tw/image/data/files/coin-master-spin-link-today_GM406889139.pdfIn PDF document text
    • https://new-era.com.tw/image/data/files/master-free-spins-and-coins_GM406889139.pdfIn PDF document text
    • http://new-era.com.tw/image/data/files/coin-master-rewards-free-spins_GM406889139.pdfIn PDF document text
    • https://new-era.com.tw/image/data/files/how-to-get-free-robux-without-downloading-apps-2021_GM431946152.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
stream_002_off000030dd.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x30DD 22932 bytes
SHA-256: d56a2b7846747aa9b1eeb0f736067aeb48bf41bc3cedf646d002ddc3acb78f4a
font_01_sfnt_off00006481.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6481 18288 bytes
SHA-256: e7eedd1d7f2d1bddccca1a35bcbf42f4aa03d5dcfedc55eaf08a1a6e6f1d261c

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