Malicious PDF — malware analysis report

Static analysis result for SHA-256 94e083c0cd338761…

MALICIOUS

PDF

35.2 KB Created: 2021-07-06 09:46:07 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-11-22
MD5: 6a35c9a91209c2369a99f600d3ddc44e SHA-1: 899e7f1459a887349d6e4c80983417679e349ece SHA-256: 94e083c0cd338761859322e4579689c918e42be068592d02b6c7b610681d9c58
220 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document is designed as a lure, using the guise of free in-game currency and hacks to trick users into clicking malicious links. The primary link directs to a known malicious redirector infrastructure, which likely serves as a gateway to further malicious content or exploits. The document body and heuristics indicate a scam related to popular games like Coin Master and Roblox.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

Heuristics 5

  • PDF links to a 'free generator / game hack' redirector critical 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. CRITICAL on its own: the /app/<id>/<slug>-game-hack path shape is unambiguous scam infra, and the host rotates so a host-list match can't be relied on.
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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.
  • 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
  • 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/free-coins-and-spins-for-coin-master-game-hack In PDF document text
    • http://www.nelsonssales.com/media/storage/editor/files/how-to-host-a-minecraft-server-for-free_GM479516143.pdfIn PDF document text
    • http://www.nelsonssales.com/media/storage/editor/files/bloxland-where-you-get-free-robux-codes_GM431946152.pdfIn PDF document text
    • http://www.nelsonssales.com/media/storage/editor/files/how-to-hack-coin-master-game_GM406889139.pdfIn PDF document text
    • http://www.nelsonssales.com/media/storage/editor/files/roblox-adopt-me-free-pets_GM431946152.pdfIn PDF document text
    • http://www.nelsonssales.com/media/storage/editor/files/snippet-hack-roblox_GM431946152.pdfIn PDF document text
    • http://www.nelsonssales.com/media/storage/editor/files/how-to-get-free-items-in-roblox-2021_GM431946152.pdfIn PDF document text
    • http://www.nelsonssales.com/media/storage/editor/files/coin-master-free-coins-and-spins-blogspot_GM406889139.pdfIn PDF document text
    • http://www.nelsonssales.com/media/storage/editor/files/robux-maker-free-download_GM431946152.pdfIn PDF document text
    • http://www.nelsonssales.com/media/storage/editor/files/diamond-hack-roblox-royale-high_GM431946152.pdfIn PDF document text
    • http://www.nelsonssales.com/media/storage/editor/files/coin-master-official-fan-page_GM406889139.pdfIn PDF document text
    • http://www.nelsonssales.com/media/storage/editor/files/hacking-games-roblox_GM431946152.pdfIn PDF document text
    • http://www.nelsonssales.com/media/storage/editor/files/claim-free-robux_GM431946152.pdfIn PDF document text
    • http://www.nelsonssales.com/media/storage/editor/files/city17-city-rp-roblox-free_GM431946152.pdfIn PDF document text
    • http://www.nelsonssales.com/media/storage/editor/files/free-tiktok-followers-no-human-verification-or-survey_GM835599320.pdfIn PDF document text
    • http://www.nelsonssales.com/media/storage/editor/files/free-robux-generator-2021_GM431946152.pdfIn PDF document text
    • http://www.nelsonssales.com/media/storage/editor/files/coin-master-100-spin-hack_GM406889139.pdfIn PDF document text
    • http://www.nelsonssales.com/media/storage/editor/files/how-to-get-free-robux-no-human-verification-2021_GM431946152.pdfIn PDF document text
    • http://www.nelsonssales.com/media/storage/editor/files/coin-master-apk-hack-2021_GM406889139.pdfIn PDF document text
    • http://www.nelsonssales.com/media/storage/editor/files/coin-master-free-spins-link-blogspot-today_GM406889139.pdfIn PDF document text
    • http://www.nelsonssales.com/media/storage/editor/files/free-clothing-roblox-hack_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
font_00_sfnt_off000033eb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x33EB 22768 bytes
SHA-256: 4429414757e926debb8716bb23fea2dd85b22ff18f903cb9ffb6bf20cdab1f54
font_01_sfnt_off000066d3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x66D3 18348 bytes
SHA-256: c90f632020bcb1e728f62a43997badda2860e0d329262e99dedc1f8a12c39115

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