Malicious PDF — malware analysis report

Static analysis result for SHA-256 dbd6e72f323f12ac…

MALICIOUS

PDF

33.4 KB Created: 2021-07-07 21:28:34 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-25
MD5: 125b9b5c88f21d4b817e3bd22b3ebab3 SHA-1: 231a5f615663ef4852e78d347dc0381783192e25 SHA-256: dbd6e72f323f12acf6d8dda0a53e023b1df25c6e805887d42140d918f9731011
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/479516143/minecraft-free-android-game-hack PDF link annotation
    • https://goodtools.tw/upload/files/find-free-download-of-roblox-zombie-rush-for-windows7_GM431946152.pdfIn PDF document text
    • https://goodtools.tw/upload/files/roblox-robux-hack-mobile_GM431946152.pdfIn PDF document text
    • https://goodtools.tw/upload/files/free-views-on-tiktok_GM835599320.pdfIn PDF document text
    • https://goodtools.tw/upload/files/how-to-get-coin-master-free-spin-link_GM406889139.pdfIn PDF document text
    • https://goodtools.tw/upload/files/dragon-ball-rage-roblox-cheat-engine-hack_GM431946152.pdfIn PDF document text
    • https://goodtools.tw/upload/files/how-to-hack-roblox-game-apocalypse-rising_GM431946152.pdfIn PDF document text
    • https://goodtools.tw/upload/files/free-coin-master-spin-daily-link_GM406889139.pdfIn PDF document text
    • https://goodtools.tw/upload/files/roblox-scp-site-61-admin-cheat_GM431946152.pdfIn PDF document text
    • https://goodtools.tw/upload/files/hack-tool-roblox-pokemon-adventures_GM431946152.pdfIn PDF document text
    • https://goodtools.tw/upload/files/coin-master-hack-tool-v1-9-download_GM406889139.pdfIn PDF document text
    • https://goodtools.tw/upload/files/free-spins-coin-master-app_GM406889139.pdfIn PDF document text
    • https://goodtools.tw/upload/files/coin-master-hack-version-2021-free-download_GM406889139.pdfIn PDF document text
    • https://goodtools.tw/upload/files/free-abandoned-roblox-accounts_GM431946152.pdfIn PDF document text
    • https://goodtools.tw/upload/files/roblox-online-free-no-sign-up_GM431946152.pdfIn PDF document text
    • https://goodtools.tw/upload/files/coin-master-free-spins-and-coins-daily_GM406889139.pdfIn PDF document text
    • https://goodtools.tw/upload/files/free-robux-generator-2021-no-information_GM431946152.pdfIn PDF document text
    • https://goodtools.tw/upload/files/do-you-get-windows-10-minecraft-for-free-with-java_GM479516143.pdfIn PDF document text
    • https://goodtools.tw/upload/files/roblox-dowlowd-for-free_GM431946152.pdfIn PDF document text
    • https://goodtools.tw/upload/files/how-to-get-free-spins-and-coins-on-coin-master_GM406889139.pdfIn PDF document text
    • https://goodtools.tw/upload/files/freerobuxhack-us-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
font_00_sfnt_off00002f48.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2F48 22140 bytes
SHA-256: 708240b683c753b519995d581eb41ca785a499f2c14d251dfe9e910b4274ccf6
font_01_sfnt_off00006000.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6000 18172 bytes
SHA-256: 76a46b6ffa672d4629705b025ed1d2900a12de91bcde6df1b9c7209dc48d6afd

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