Malicious PDF — malware analysis report

Static analysis result for SHA-256 057537d80e573d16…

MALICIOUS

PDF

42.9 KB Created: 2021-05-10 17:01:45 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-26
MD5: f9745919dd6588d9ef3fb958679e9c27 SHA-1: bfb76fc2a05271af8f4779c28cd8c12e8646b398 SHA-256: 057537d80e573d16769ee228bb1627d158232a5c192d73edd2172e14c5946a6a
200 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF document employs social engineering tactics, presenting itself as a 'game hack' or free item generator to trick users into clicking malicious links. The primary link redirects to known malicious infrastructure, indicating a likely phishing or malware distribution attempt. The document's structure and embedded links suggest it is designed to exploit user interest in free in-game items or cheats, a common lure for malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9933

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/hacks-minecraft-game-hack In PDF document text
    • http://ktn.com.br/images/roblox-builders-club-free_GM431946152.pdfIn PDF document text
    • http://ktn.com.br/images/free-robux-no-password_GM431946152.pdfIn PDF document text
    • http://ktn.com.br/images/lazyblocks-com-robux_GM431946152.pdfIn PDF document text
    • http://ktn.com.br/images/free-robux-scam_GM431946152.pdfIn PDF document text
    • http://ktn.com.br/images/coin-master-free-spins-cheat_GM406889139.pdfIn PDF document text
    • http://ktn.com.br/images/how-to-get-free-robux-without-download-apps-or-survey_GM431946152.pdfIn PDF document text
    • http://ktn.com.br/images/coin-master-firebird-card-free_GM406889139.pdfIn PDF document text
    • http://ktn.com.br/images/coin-master-daily-free-spins-link-facebook_GM406889139.pdfIn PDF document text
    • http://ktn.com.br/images/coin-master-spins-hack-2021_GM406889139.pdfIn PDF document text
    • http://ktn.com.br/images/free-robux-generator-2021-no-survey_GM431946152.pdfIn PDF document text
    • http://ktn.com.br/images/free-roblox-boy-hair_GM431946152.pdfIn PDF document text
    • http://ktn.com.br/images/free-back-accessories-roblox_GM431946152.pdfIn PDF document text
    • http://ktn.com.br/images/minecraft-education-edition-free_GM479516143.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00004394.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x4394 25300 bytes
SHA-256: 3d257dbb2b5a94e444fd7559abcb4e319465d4a27caef4d1ce1b59bb4fda5181
font_01_sfnt_off00007d41.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7D41 2880 bytes
SHA-256: 10d025f04f706eb71cdda4f99784df1b9ccb52e48080e43095e0398eaef6f132
font_02_sfnt_off0000872c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x872C 17740 bytes
SHA-256: b4d4c972e4571c6533ebd60601472515a9d19d13ad1d189b55006888a0b23e02

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