Malicious PDF — malware analysis report

Static analysis result for SHA-256 1ac25d1be8f9e171…

MALICIOUS

PDF

37.0 KB Created: 2021-07-04 11:17:38 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-11-20
MD5: 28167e19a26266567cabbdb1f2ff42ef SHA-1: 5ae3717642ef2d89552f54e5da58d7b983cd6c05 SHA-256: 1ac25d1be8f9e1712323a03e7408615bee1a3b8fef5762075229b4342314ef3d
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document contains multiple links that redirect to malicious infrastructure, specifically promoting game hacks and generators. The primary lure is for 'Coin Master Free Link Spin', directing users to http://netcdn.tw/app/406889139/coin-master-free-link-spin-game-hack. The document's structure and embedded links suggest a phishing or scam attempt designed to trick users into visiting potentially harmful sites. No scripts were extracted, but the PDF's nature and embedded URLs strongly indicate a malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9886

Heuristics 4

  • 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.
  • 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/coin-master-free-link-spin-game-hack In PDF document text
    • http://www.r2rfurniture.com/uploaded_files/userfiles/files/free-exploits-for-roblox-2021_GM431946152.pdfIn PDF document text
    • http://www.r2rfurniture.com/uploaded_files/userfiles/files/btools-hack-roblox-2021_GM431946152.pdfIn PDF document text
    • http://www.r2rfurniture.com/uploaded_files/userfiles/files/coin-master-spin-hack-pc_GM406889139.pdfIn PDF document text
    • http://www.r2rfurniture.com/uploaded_files/userfiles/files/roblox-promo-codes-for-free-robux_GM431946152.pdfIn PDF document text
    • http://www.r2rfurniture.com/uploaded_files/userfiles/files/free-robux-redeem-code-hack_GM431946152.pdfIn PDF document text
    • http://www.r2rfurniture.com/uploaded_files/userfiles/files/free-rixty-codes-for-roblox-generator_GM431946152.pdfIn PDF document text
    • http://www.r2rfurniture.com/uploaded_files/userfiles/files/coin-master-hack-mod-apk-free-download_GM406889139.pdfIn PDF document text
    • http://www.r2rfurniture.com/uploaded_files/userfiles/files/coin-master-free-spins-deutsch-download-ios-link_GM406889139.pdfIn PDF document text
    • http://www.r2rfurniture.com/uploaded_files/userfiles/files/free-roblox-cardseasy_GM431946152.pdfIn PDF document text
    • http://www.r2rfurniture.com/uploaded_files/userfiles/files/minecraft-cheats-switch_GM479516143.pdfIn PDF document text
    • http://www.r2rfurniture.com/uploaded_files/userfiles/files/t-shirt-roblox-free_GM431946152.pdfIn PDF document text
    • http://www.r2rfurniture.com/uploaded_files/userfiles/files/2021-free-spins-coin-master_GM406889139.pdfIn PDF document text
    • http://www.r2rfurniture.com/uploaded_files/userfiles/files/is-roblox-studio-free_GM431946152.pdfIn PDF document text
    • http://www.r2rfurniture.com/uploaded_files/userfiles/files/roblox-builders-club-free-2021_GM431946152.pdfIn PDF document text
    • http://www.r2rfurniture.com/uploaded_files/userfiles/files/how-to-hack-roblox-for-robux_GM431946152.pdfIn PDF document text
    • http://www.r2rfurniture.com/uploaded_files/userfiles/files/coin-master-free-coins-facebook_GM406889139.pdfIn PDF document text
    • http://www.r2rfurniture.com/uploaded_files/userfiles/files/coin-master-daily-free-spins-and-coins-2021_GM406889139.pdfIn PDF document text
    • http://www.r2rfurniture.com/uploaded_files/userfiles/files/free-robux-for-kids-no-verification_GM431946152.pdfIn PDF document text
    • http://www.r2rfurniture.com/uploaded_files/userfiles/files/rbxfree-com-free-robux_GM431946152.pdfIn PDF document text
    • http://www.r2rfurniture.com/uploaded_files/userfiles/files/ways-to-earn-robux_GM431946152.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00003152.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x3152 22696 bytes
SHA-256: b2371c1f5904b8495c80598c02491eb9429a04a52c5487df2a9e70292ac28c5b
font_01_sfnt_off000063b9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x63B9 2896 bytes
SHA-256: c1a618813a64314343402b2ec738fc11c4c912460a4c7ae3029924d2f9a229cd
font_02_sfnt_off00006d9e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6D9E 18344 bytes
SHA-256: 4cc6e2dc521752f6662ff63411afc6c7bdb40e83b7743aeaa6a2e3eea921da6e

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