Malicious PDF — malware analysis report

Static analysis result for SHA-256 cf5649312e6f0d47…

MALICIOUS

PDF

42.8 KB Created: 2021-05-13 14:33:37 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-23
MD5: 67d1c88c0671fb2441a5552f7822d45b SHA-1: 2ad67daf6601d5c7fb86a84d2809a275032baf5b SHA-256: cf5649312e6f0d47af36fe89e1e4fd51c4d40ea32dd125e373cd40106f1b13dc
200 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains multiple links designed to lure users into clicking on what appears to be a 'free generator' or 'game hack'. The primary link redirects to a malicious domain known for hosting such lures. The 'ClickFix' heuristic indicates the document likely instructs the user to manually execute a command or open a link, bypassing standard macro security. While no scripts were explicitly extracted, the PDF structure and embedded links suggest a workflow aimed at redirecting users to malicious 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.
  • ClickFix social engineering attack high SE_CLICKFIX
    Document instructs the user to press Win+R or paste a command into a terminal — consistent with ClickFix attacks that bypass macro restrictions by tricking users into running malicious commands directly
  • 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/479516143/minecraft-free-download-game-hack In PDF document text
    • http://enosiderma.gr/images/free-robux-no-verification_GM431946152.pdfIn PDF document text
    • http://enosiderma.gr/images/coin-master-daily-free-spins-link-today-2021_GM406889139.pdfIn PDF document text
    • http://enosiderma.gr/images/free-coin-master-spins-daily_GM406889139.pdfIn PDF document text
    • http://enosiderma.gr/images/roblox-re_GM431946152.pdfIn PDF document text
    • http://enosiderma.gr/images/how-to-get-free-spins-and-coins-on-coin-master_GM406889139.pdfIn PDF document text
    • http://enosiderma.gr/images/roblox-free-hair-boy_GM431946152.pdfIn PDF document text
    • http://enosiderma.gr/images/coin-master-hack-game_GM406889139.pdfIn PDF document text
    • http://enosiderma.gr/images/coin-master-card-hack-apk_GM406889139.pdfIn PDF document text
    • http://enosiderma.gr/images/minecraft-hack-app_GM479516143.pdfIn PDF document text
    • http://enosiderma.gr/images/free-coins-and-spins-coin-master_GM406889139.pdfIn PDF document text
    • http://enosiderma.gr/images/how-to-get-free-robux-without-surveys_GM431946152.pdfIn PDF document text
    • http://enosiderma.gr/images/how-to-free-robux_GM431946152.pdfIn PDF document text
    • http://enosiderma.gr/images/free-card-link-coin-master_GM406889139.pdfIn PDF document text
    • http://enosiderma.gr/images/free-robux-hacker-us_GM431946152.pdfIn PDF document text
    • http://enosiderma.gr/images/how-to-hack-coin-master_GM406889139.pdfIn PDF document text
    • http://enosiderma.gr/images/minecraft-games-online-free-no-download_GM479516143.pdfIn PDF document text
    • http://enosiderma.gr/images/free-redeem-code-for-coin-master_GM406889139.pdfIn PDF document text
    • http://enosiderma.gr/images/coin-master-free-spins-2021_GM406889139.pdfIn PDF document text
    • http://enosiderma.gr/images/roblox-com-free-robux_GM431946152.pdfIn PDF document text
    • http://enosiderma.gr/images/minecraft-pvp-hacks_GM479516143.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_off00004924.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x4924 27736 bytes
SHA-256: 73c969ba439ca25fe20cbd42319ce30448be931fc2826850a766aca6fd76ebae
font_01_sfnt_off00008503.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8503 18292 bytes
SHA-256: eff5919d985126b8591bb7cd3dea6a103dcf6f67049ada279646be2986fdbf31

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