Malicious PDF — malware analysis report

Static analysis result for SHA-256 056cef3b81e4fc87…

MALICIOUS

PDF

34.1 KB Created: 2021-06-18 22:04:55 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-08-25
MD5: a80a53f94c57ead4e70b542d7a5ef145 SHA-1: a65973f06e91c73d858b74dc5cb84fd2c4663d5d SHA-256: 056cef3b81e4fc87cae9bc0e9f2400519a0b91f8ea5e3a5f7d122ec9f4a70943
220 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous links designed to lure users with promises of game hacks and generators, directing them to a known malicious redirector. The document body and heuristics indicate a phishing or scam attempt, likely using a spearphishing attachment vector. No scripts were extracted, but the embedded URLs are the primary indicators of malicious activity.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

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 http://netcdn.co/app/431946152/hack-para-roblox-jailbreack-coat-y-muchos-mas-game-hack In PDF document text
    • http://balkanin.com/images/how-to-get-free-coins-in-coin-master_GM406889139.pdfIn PDF document text
    • http://balkanin.com/images/free-spins-coin-master-facebook_GM406889139.pdfIn PDF document text
    • http://balkanin.com/images/how-to-get-free-robux-no-human-verification-2021_GM431946152.pdfIn PDF document text
    • http://balkanin.com/images/how-to-get-free-robux_GM431946152.pdfIn PDF document text
    • http://balkanin.com/images/free-robux-no-verify_GM431946152.pdfIn PDF document text
    • http://balkanin.com/images/free-minecraft-alt-accounts_GM479516143.pdfIn PDF document text
    • http://balkanin.com/images/free-robux-codes-generator_GM431946152.pdfIn PDF document text
    • http://balkanin.com/images/coin-master-free-coins-hack_GM406889139.pdfIn PDF document text
    • http://balkanin.com/images/minecraft-pe-hack-client_GM479516143.pdfIn PDF document text
    • http://balkanin.com/images/how-to-try-roblox-accessoryes-for-free_GM431946152.pdfIn PDF document text
    • http://balkanin.com/images/coin-master-daily-free-spins-and-coins_GM406889139.pdfIn PDF document text
    • http://balkanin.com/images/easy-coin-master-hack-without-verification_GM406889139.pdfIn PDF document text
    • http://balkanin.com/images/how-to-use-cheat-engine-on-roblox-one-punch-man_GM431946152.pdfIn PDF document text
    • http://balkanin.com/images/roblox-accounts-for-sale-free_GM431946152.pdfIn PDF document text
    • http://balkanin.com/images/coin-master-free-spins-and-coins-haktuts_GM406889139.pdfIn PDF document text
    • http://balkanin.com/images/free-robux-no-verify-or-password-needed_GM431946152.pdfIn PDF document text
    • http://balkanin.com/images/how-to-get-free-robux-easy-hack_GM431946152.pdfIn PDF document text
    • http://balkanin.com/images/what-is-the-fastest-way-to-get-xp-in-pokemon-go_GM1094591345.pdfIn PDF document text
    • http://balkanin.com/images/free-minecraft-bedrock-server-hosting_GM479516143.pdfIn PDF document text
    • http://balkanin.com/images/how-to-get-minecraft-for-free-on-iphone_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_off00002e06.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2E06 22044 bytes
SHA-256: 18ce5bf8989c0f1bc398d1df0d206dcdd3c4e07ae5f171b8eb5d84ced3681e16
font_01_sfnt_off00005e93.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5E93 19676 bytes
SHA-256: fde87052009d0d7c627251168819012e000b61a648e7faac40e381eefe29eb21

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