Malicious PDF — malware analysis report

Static analysis result for SHA-256 d330c048518ec33d…

MALICIOUS

PDF

34.8 KB Created: 2021-07-09 01:19:09 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-17
MD5: 8266a542ab57529e611ecd6a58567d47 SHA-1: 69e219e1de6791bc375ea91128060b82e0040ab6 SHA-256: d330c048518ec33d42b695e38bc8e0ee7628bc94d315e53fe1632a99dfbbdb40
142 Risk Score

Malware Insights

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

This PDF document contains a large number of external links, many of which are disguised as PDF files related to game hacks and free currency. The primary lure is to trick users into clicking these links, which likely lead to phishing sites or scam pages. The heuristic 'PDF_SEO_LINK_FARM' indicates a mass of external links designed to appear as legitimate content, further supporting the scam-based attack pattern. No scripts were extracted, but the document's structure and content strongly suggest a phishing or scam attempt.

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/are-there-any-coin-master-hacks-that-actually-work-game-hack PDF link annotation
    • http://educhina.mn/editor/files/minecraft-xbox-one-code-free_GM479516143.pdfIn PDF document text
    • http://educhina.mn/editor/files/free-robux-generator-2021-no-human-verification-or-survey_GM431946152.pdfIn PDF document text
    • http://educhina.mn/editor/files/how-to-get-minecraft-for-free-on-ps4-2021_GM479516143.pdfIn PDF document text
    • http://educhina.mn/editor/files/free-robux-codes-2021-real_GM431946152.pdfIn PDF document text
    • http://educhina.mn/editor/files/pasos-para-hackear-coins-master_GM406889139.pdfIn PDF document text
    • http://educhina.mn/editor/files/free-robux-without-any-verification_GM431946152.pdfIn PDF document text
    • http://educhina.mn/editor/files/roblox-how-to-open-cheat-engine_GM431946152.pdfIn PDF document text
    • http://educhina.mn/editor/files/how-to-put-in-hacking-scripts-roblox_GM431946152.pdfIn PDF document text
    • http://educhina.mn/editor/files/coin-master-free-spins-link-today_GM406889139.pdfIn PDF document text
    • http://educhina.mn/editor/files/husky-roblox-free-robux-link_GM431946152.pdfIn PDF document text
    • http://educhina.mn/editor/files/roblox-generator_GM431946152.pdfIn PDF document text
    • http://educhina.mn/editor/files/coin-master-daily-free-spins-link_GM406889139.pdfIn PDF document text
    • http://educhina.mn/editor/files/free-robux-edit-this-cookie_GM431946152.pdfIn PDF document text
    • http://educhina.mn/editor/files/free-roblox-gift-card_GM431946152.pdfIn PDF document text
    • http://educhina.mn/editor/files/free-robux-no-verification-2021_GM431946152.pdfIn PDF document text
    • http://educhina.mn/editor/files/roblox-the-northern-frontier-hacks_GM431946152.pdfIn PDF document text
    • http://educhina.mn/editor/files/coin-master-free_GM406889139.pdfIn PDF document text
    • http://educhina.mn/editor/files/corn-master_GM406889139.pdfIn PDF document text
    • http://educhina.mn/editor/files/how-to-hack-a-minecraft-server_GM479516143.pdfIn PDF document text
    • http://educhina.mn/editor/files/people-who-hacked-roblox-and-got-unlmitited-robux_GM431946152.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_002_off0000316c.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x316C 22656 bytes
SHA-256: fb661c9bee357cc359022a337191e9c660968496547c88eccd2049e59fd59206
font_01_sfnt_off000063e2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x63E2 18764 bytes
SHA-256: fda0f92cf4b877814e31b565e5e35f3727f0f59612dfc2e3edd29183971e4e11

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