Malicious PDF — malware analysis report

Static analysis result for SHA-256 c026900bf77c022f…

MALICIOUS

PDF

42.9 KB Created: 2021-05-14 21:34:18 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-23
MD5: cce6769cedc29d8627996cc4101bcdb1 SHA-1: 753ced02beae651e5eb88cdac8e0645586f279c2 SHA-256: c026900bf77c022fcb15fcd720da31b747412dba36d292df7018cab9ba714caf
220 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains numerous links designed to lure users to external websites, including a known malicious redirector. The document body and embedded links explicitly mention 'free Robux' and 'game hacks', indicating a social engineering lure to drive traffic to potentially malicious content. While no scripts were directly extracted, the PDF structure and embedded URLs suggest a malicious redirection chain, likely intended to deliver further malware or phishing content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9971

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 https://netcdn.xyz/app/431946152/free-robux-codes-no-human-verification-game-hack In PDF document text
    • https://ethraa-sys.com/userfiles/files/free-robux-generator-without-verification_GM431946152.pdfIn PDF document text
    • https://ethraa-sys.com/userfiles/files/can-u-get-free-robux_GM431946152.pdfIn PDF document text
    • https://ethraa-sys.com/userfiles/files/free-robux-that-actually-works-2021_GM431946152.pdfIn PDF document text
    • https://ethraa-sys.com/userfiles/files/coin-master-free-spins-link-2021_GM406889139.pdfIn PDF document text
    • https://ethraa-sys.com/userfiles/files/coin-master-free-spin-daily-link_GM406889139.pdfIn PDF document text
    • https://ethraa-sys.com/userfiles/files/minecraft-coins-free_GM479516143.pdfIn PDF document text
    • https://ethraa-sys.com/userfiles/files/free-daily-spins-coin-master-2021_GM406889139.pdfIn PDF document text
    • https://ethraa-sys.com/userfiles/files/free-spins-generated-from-coin-master_GM406889139.pdfIn PDF document text
    • https://ethraa-sys.com/userfiles/files/hack-coin-master-android-game_GM406889139.pdfIn PDF document text
    • https://ethraa-sys.com/userfiles/files/free-spins-coin-master-blogspot_GM406889139.pdfIn PDF document text
    • https://ethraa-sys.com/userfiles/files/free-minecraft-mods_GM479516143.pdfIn PDF document text
    • https://ethraa-sys.com/userfiles/files/how-to-get-free-robux-without-verification-or-surveys_GM431946152.pdfIn PDF document text
    • https://ethraa-sys.com/userfiles/files/coin-master-hack-without-human-verification-2021_GM406889139.pdfIn PDF document text
    • https://ethraa-sys.com/userfiles/files/cmaster-club-coin-master-hack_GM406889139.pdfIn PDF document text
    • https://ethraa-sys.com/userfiles/files/roblox-redeem_GM431946152.pdfIn PDF document text
    • https://ethraa-sys.com/userfiles/files/coin-master-32-hack-apk-download_GM406889139.pdfIn PDF document text
    • https://ethraa-sys.com/userfiles/files/coin-master-free-spins-link-2021-no-verification-deutsch_GM406889139.pdfIn PDF document text
    • https://ethraa-sys.com/userfiles/files/free-roblox-hack-us_GM431946152.pdfIn PDF document text
    • https://ethraa-sys.com/userfiles/files/free-robux-without-survey_GM431946152.pdfIn PDF document text
    • https://ethraa-sys.com/userfiles/files/roblox-executor-free-download_GM431946152.pdfIn PDF document text
    • https://www.micIn 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_off000047f0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x47F0 26152 bytes
SHA-256: 1b8b3c86c7e8a2445ccf956686ca238108ac0812043bbe8a79128602e6a78323
font_01_sfnt_off00008305.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8305 19032 bytes
SHA-256: 7535c842b13f5ab09a8d1f6df205e44a1f60a7fdf3d88b4466f5e7b4ed5bfe6e

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