Malicious PDF — malware analysis report

Static analysis result for SHA-256 cf9527e3df84abb4…

MALICIOUS

PDF

34.2 KB Created: 2021-07-05 03:36:22 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-13
MD5: 67d22f9dd8832e26359f21ec4718cc3b SHA-1: 6d27344eaf7bce0f0bd3435042ae1f5e4cc409e2 SHA-256: cf9527e3df84abb4dca78b18528b5f06c9aaeaf4c250d715488570424bc870ef
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.001 User Execution: Malicious Link

The PDF contains multiple links, including one identified as a malicious redirector, that lure users with promises of game hacks and free in-game currency. The primary malicious link, http://netcdn.tw/app/431946152/girl-roblox-avatar-game-hack, is designed to lead users to potentially harmful content. The document body and heuristics confirm the intent to trick users into clicking these links, likely as part of a phishing or scam campaign.

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.tw/app/431946152/girl-roblox-avatar-game-hack In PDF document text
    • https://elearning.manurulkhoir.sch.id/__statics/gudangsoal/files/coin-master-free-link-2021_GM406889139.pdfIn PDF document text
    • http://elearning.manurulkhoir.sch.id/__statics/gudangsoal/files/hacked-roblox-items-on-catalog_GM431946152.pdfIn PDF document text
    • https://elearning.manurulkhoir.sch.id/__statics/gudangsoal/files/apps-for-free-robux_GM431946152.pdfIn PDF document text
    • http://elearning.manurulkhoir.sch.id/__statics/gudangsoal/files/khaos-free-robux-pastebin_GM431946152.pdfIn PDF document text
    • https://elearning.manurulkhoir.sch.id/__statics/gudangsoal/files/roblox-free-robux-hack-youtube_GM431946152.pdfIn PDF document text
    • https://elearning.manurulkhoir.sch.id/__statics/gudangsoal/files/how-to-change-your-username-on-roblox-for-free-2021_GM431946152.pdfIn PDF document text
    • http://elearning.manurulkhoir.sch.id/__statics/gudangsoal/files/free-robux-codes-2021-not-used_GM431946152.pdfIn PDF document text
    • https://elearning.manurulkhoir.sch.id/__statics/gudangsoal/files/hacked-roblox-accounts-list_GM431946152.pdfIn PDF document text
    • https://elearning.manurulkhoir.sch.id/__statics/gudangsoal/files/minecraft-net-free_GM479516143.pdfIn PDF document text
    • https://elearning.manurulkhoir.sch.id/__statics/gudangsoal/files/roblox-cheat-mods_GM431946152.pdfIn PDF document text
    • https://elearning.manurulkhoir.sch.id/__statics/gudangsoal/files/free-coin-and-spin-link_GM406889139.pdfIn PDF document text
    • https://elearning.manurulkhoir.sch.id/__statics/gudangsoal/files/minecraft-education-edition-free_GM479516143.pdfIn PDF document text
    • https://elearning.manurulkhoir.sch.id/__statics/gudangsoal/files/best-roblox-free-ex_GM431946152.pdfIn PDF document text
    • https://elearning.manurulkhoir.sch.id/__statics/gudangsoal/files/coin-master-free-spins-link-today-new-2021_GM406889139.pdfIn PDF document text
    • https://elearning.manurulkhoir.sch.id/__statics/gudangsoal/files/free-roblox-hait_GM431946152.pdfIn PDF document text
    • https://elearning.manurulkhoir.sch.id/__statics/gudangsoal/files/comapp-trekfree-coin-spindaily-link-master_GM406889139.pdfIn PDF document text
    • https://elearning.manurulkhoir.sch.id/__statics/gudangsoal/files/roblox-no-download-hack_GM431946152.pdfIn PDF document text
    • https://elearning.manurulkhoir.sch.id/__statics/gudangsoal/files/hacks-for-roblox-jailbreak_GM431946152.pdfIn PDF document text
    • https://elearning.manurulkhoir.sch.id/__statics/gudangsoal/files/aimbot-for-roblox-free-for-all_GM431946152.pdfIn PDF document text
    • https://elearning.manurulkhoir.sch.id/__statics/gudangsoal/files/what-is-robux_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_off00003106.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x3106 21900 bytes
SHA-256: b027ea943ba792b76a5731eb458ba30db1fc57a34a6ff91a2d3908ade57e9491
font_01_sfnt_off0000610d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x610D 18824 bytes
SHA-256: 5de93663545e585bb3ec51caaed0e7665131e60661237b1a7a5d41b420e717e4

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