Malicious PDF — malware analysis report

Static analysis result for SHA-256 a55cd44dfadd65dc…

MALICIOUS

PDF

42.9 KB Created: 2021-05-12 17:32:18 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-11
MD5: 95aa23032efd092f2ab84bb68a99bc41 SHA-1: 990bbee660e3f362beb542080eb9e43b9a1cfa2a SHA-256: a55cd44dfadd65dc99430163b82454315346c1cbb7b31739367b0a4720760b4d
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document contains links designed to lure users into clicking on them by promising free game items and hacks. The primary link redirects to a known malicious infrastructure, indicating a phishing or scam attempt. While no scripts were explicitly extracted, the PDF structure and embedded URLs suggest a potential for JavaScript execution or further redirection to malicious sites, aligning with common phishing tactics.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9971

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 https://netcdn.xyz/app/431946152/cute-free-roblox-outfits-game-hack In PDF document text
    • http://library.umuslim.ac.id/repository/how-to-get-minecraft-for-free-on-laptop_GM479516143.pdfIn PDF document text
    • http://library.umuslim.ac.id/repository/how-do-you-get-free-robux-on-roblox_GM431946152.pdfIn PDF document text
    • http://library.umuslim.ac.id//repository/what-games-on-roblox-give-you-free-robux_GM431946152.pdfIn PDF document text
    • http://library.umuslim.ac.id//repository/how-you-get-robux_GM431946152.pdfIn PDF document text
    • http://library.umuslim.ac.id/repository/minecraft-hack-app_GM479516143.pdfIn PDF document text
    • http://library.umuslim.ac.id/repository/free-spins-for-coin-master-2021_GM406889139.pdfIn PDF document text
    • http://library.umuslim.ac.id/repository/coin-master-free-spin-and-coin-links_GM406889139.pdfIn PDF document text
    • http://library.umuslim.ac.id/repository/coin-master-daily-free-spins_GM406889139.pdfIn PDF document text
    • http://library.umuslim.ac.id/repository/free-robux-websites-that-actually-work_GM431946152.pdfIn PDF document text
    • http://library.umuslim.ac.id/repository/300-free-spins-coin-master_GM406889139.pdfIn PDF document text
    • http://library.umuslim.ac.id/repository/coin-master-hack-apk-ios_GM406889139.pdfIn PDF document text
    • http://library.umuslim.ac.id//repository/get-free-coins-for-coin-master_GM406889139.pdfIn PDF document text
    • http://library.umuslim.ac.id//repository/how-to-get-minecraft-for-free-on-mac_GM479516143.pdfIn PDF document text
    • http://library.umuslim.ac.id/repository/haktuts-coin-master-hack_GM406889139.pdfIn PDF document text
    • http://library.umuslim.ac.id//repository/minecraft-bedrock-free_GM479516143.pdfIn PDF document text
    • http://library.umuslim.ac.id/repository/free-coin-master-spins-for-today_GM406889139.pdfIn PDF document text
    • http://library.umuslim.ac.id//repository/how-to-hack-roblox-to-get-free-robux_GM431946152.pdfIn PDF document text
    • http://library.umuslim.ac.id/repository/minecraft-pocket-edition-mods-for-free_GM479516143.pdfIn PDF document text
    • http://library.umuslim.ac.id/repository/coin-master-free-2021-spin-link_GM406889139.pdfIn PDF document text
    • http://library.umuslim.ac.id//repository/coin-master-free-spins-april-2021_GM406889139.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_off0000482d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x482D 27492 bytes
SHA-256: e6888a769de656376644de4992530419b47c6238765fe24d7ae5af554d0f3380
font_01_sfnt_off00008556.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8556 18312 bytes
SHA-256: 2199fd6d62bdff63a90b18f1783fe44650e4aecd573f3309c05a38fa35b4e6eb

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