Malicious PDF — malware analysis report

Static analysis result for SHA-256 a7e6252b49025fdd…

MALICIOUS

PDF

44.2 KB Created: 2021-06-14 00:09:06 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-15
MD5: 1e55314ea247a2b47c2e02c0ddccd947 SHA-1: 2a00d23f0cdd6fd29b7ec751c083b7a6c969e443 SHA-256: a7e6252b49025fdd014eba8f78eb02071d833daa759d7a43a1abda0147be339b
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple links, including one identified as a malicious redirector for a 'game hack' lure. The embedded URL http://netcdn.co/app/431946152/roblox-free-robux-hack-no-survey-game-hack is likely intended to lead the user to download further malicious content or visit a phishing site. The presence of multiple similar URLs suggests a campaign distributing lures for popular games.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9976

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-free-robux-hack-no-survey-game-hack In PDF document text
    • https://www.armera.co.uk/uploads/files/files/free-minecraft-skins_GM479516143.pdfIn PDF document text
    • https://www.armera.co.uk/uploads/files/files/coin-master-daily-spin-free_GM406889139.pdfIn PDF document text
    • https://www.armera.co.uk/uploads/files/files/minecraft-bedrock-edition-free_GM479516143.pdfIn PDF document text
    • https://www.armera.co.uk/uploads/files/files/roblox-script-hack_GM431946152.pdfIn PDF document text
    • https://www.armera.co.uk/uploads/files/files/free-coins-coin-master-hack_GM406889139.pdfIn PDF document text
    • https://www.armera.co.uk/uploads/files/files/minecraft-dungeons-free-download_GM479516143.pdfIn PDF document text
    • https://www.armera.co.uk/uploads/files/files/get-coin-master-hack_GM406889139.pdfIn PDF document text
    • https://www.armera.co.uk/uploads/files/files/coin-master-hack-app_GM406889139.pdfIn PDF document text
    • https://www.armera.co.uk/uploads/files/files/free-spin-card-exchange-coin-master_GM406889139.pdfIn PDF document text
    • https://www.armera.co.uk/uploads/files/files/how-to-get-robux-for-free-2021_GM431946152.pdfIn PDF document text
    • https://www.armera.co.uk/uploads/files/files/free-daily-spins-coin-master-2021_GM406889139.pdfIn PDF document text
    • https://www.armera.co.uk/uploads/files/files/coin-master-free-spins_GM406889139.pdfIn PDF document text
    • https://www.armera.co.uk/uploads/files/files/free-roblox-accounts-with-robux-that-work-not-banned_GM431946152.pdfIn PDF document text
    • https://www.armera.co.uk/uploads/files/files/1-billion-robux-hack_GM431946152.pdfIn PDF document text
    • https://www.armera.co.uk/uploads/files/files/coin-master-100-spin_GM406889139.pdfIn PDF document text
    • https://www.armera.co.uk/uploads/files/files/earn-free-robux-on-roblox_GM431946152.pdfIn PDF document text
    • https://www.armera.co.uk/uploads/files/files/how-to-get-free-robux-without-verifying_GM431946152.pdfIn PDF document text
    • https://www.armera.co.uk/uploads/files/files/hack-coin-master-32-mod-apk_GM406889139.pdfIn PDF document text
    • https://www.armera.co.uk/uploads/files/files/free-tiktok-followers-no-human-verification-or-survey_GM835599320.pdfIn PDF document text
    • https://www.armera.co.uk/uploads/files/files/como-hackear-coin-master_GM406889139.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
stream_003_off000049e0.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x49E0 27072 bytes
SHA-256: c69964dde4a8e09e631b2f45d4a8065d304627629f068c4c809a8041d0a2cde8
font_01_sfnt_off00008901.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8901 18780 bytes
SHA-256: ac610e6e066b4e2db207d262b9c750e1d444c633f4e73d2e1b2ee90973883368

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