Malicious PDF — malware analysis report

Static analysis result for SHA-256 8c3f87aa6d4d2c3d…

MALICIOUS

PDF

35.5 KB Created: 2021-06-25 19:17:31 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-08-25
MD5: 58b328ecee64f6b6916dc5bed9195eb6 SHA-1: 6ee7f79027f9b01752c1a199bca4d7daa77db859 SHA-256: 8c3f87aa6d4d2c3d96700260f274ece33a3fadbcbd5e0b09f89b0fd563e46224
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple links, including one that redirects to known malicious infrastructure, likely as part of a lure for game hacks or virtual currency. The document body and embedded URLs suggest a phishing or scam attempt aimed at users seeking in-game advantages. No scripts were extracted, but the presence of malicious redirectors and the lure content strongly indicate a malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

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.co/app/431946152/roblox-top-free-robux-game-hack In PDF document text
    • https://new-era.com.tw/image/data/files/roblox-studio-free-robux_GM431946152.pdfIn PDF document text
    • https://new-era.com.tw/image/data/files/how-to-hack-infinity-rpg-roblox_GM431946152.pdfIn PDF document text
    • https://new-era.com.tw/image/data/files/coin-master-free-spins-2021-today_GM406889139.pdfIn PDF document text
    • https://new-era.com.tw/image/data/files/how-to-win-free-robux_GM431946152.pdfIn PDF document text
    • http://new-era.com.tw/image/data/files/is-minecraft-free-on-mac_GM479516143.pdfIn PDF document text
    • http://new-era.com.tw/image/data/files/free-hat-avatar-roblox_GM431946152.pdfIn PDF document text
    • https://new-era.com.tw/image/data/files/how-to-exploit-roblox_GM431946152.pdfIn PDF document text
    • http://new-era.com.tw/image/data/files/coin-master-daily-spins_GM406889139.pdfIn PDF document text
    • http://new-era.com.tw/image/data/files/how-to-get-free-robux-hack-2021_GM431946152.pdfIn PDF document text
    • http://new-era.com.tw/image/data/files/minecraft-building-hacks_GM479516143.pdfIn PDF document text
    • https://new-era.com.tw/image/data/files/coin-master-free-spins-link-2021-today_GM406889139.pdfIn PDF document text
    • http://new-era.com.tw/image/data/files/is-roblox-free-on-ps4_GM431946152.pdfIn PDF document text
    • http://new-era.com.tw/image/data/files/coinmasterdailyfreespins-com_GM406889139.pdfIn PDF document text
    • https://new-era.com.tw/image/data/files/get-free-robux-today_GM431946152.pdfIn PDF document text
    • https://new-era.com.tw/image/data/files/bux-life-free-robux_GM431946152.pdfIn PDF document text
    • https://new-era.com.tw/image/data/files/coin-master-heaven-free-spins-link-2021_GM406889139.pdfIn PDF document text
    • https://new-era.com.tw/image/data/files/jailbreak-roblox-hack_GM431946152.pdfIn PDF document text
    • https://new-era.com.tw/image/data/files/free-roblox-outfits-2021_GM431946152.pdfIn PDF document text
    • http://new-era.com.tw/image/data/files/coin-master-hack-2021-no-survey_GM406889139.pdfIn PDF document text
    • http://new-era.com.tw/image/data/files/roblox-assassin_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_off000033b7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x33B7 22496 bytes
SHA-256: 40416cfc786bf38ba1495b7f5e7ddce2ef3be71076add964dea7387139707b8e
font_01_sfnt_off00006607.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6607 18968 bytes
SHA-256: 285ac19f348f48ecd636c36bf75a5ebafe83f3d45f04b66d843b866306a25049

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