Malicious PDF — malware analysis report

Static analysis result for SHA-256 e15fa35e0673ae7f…

MALICIOUS

PDF

31.8 KB Created: 2021-07-19 22:52:41 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-16
MD5: d59dc8320a7fbc7a6cb051c0dada3937 SHA-1: 8382869daca42997e7985adaf3d66e5196d6ab51 SHA-256: e15fa35e0673ae7f162e7c43b4008ef025eb518681e9cb446df6105a689e5b74
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document employs a lure for free Robux or game hacks, directing users to a known malicious redirector. The document body contains obfuscated text and multiple links to potentially malicious domains. The primary attack pattern involves social engineering to trick users into visiting malicious sites, likely for further exploitation or credential harvesting.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9900

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.tw/app/431946152/free-robux-giveaway-game-hack In PDF document text
    • http://volpatoebrum.com.br/_common/admin/scripts/ckfinder/userfiles/files/free-robux-without-downloading-apps_GM431946152.pdfIn PDF document text
    • http://volpatoebrum.com.br/_common/admin/scripts/ckfinder/userfiles/files/minecraft-free_GM479516143.pdfIn PDF document text
    • http://volpatoebrum.com.br/_common/admin/scripts/ckfinder/userfiles/files/coin-master-free-coins-2021_GM406889139.pdfIn PDF document text
    • http://volpatoebrum.com.br/_common/admin/scripts/ckfinder/userfiles/files/how-to-get-robux-for-free-2021_GM431946152.pdfIn PDF document text
    • http://volpatoebrum.com.br/_common/admin/scripts/ckfinder/userfiles/files/free-robux-redeem-codes_GM431946152.pdfIn PDF document text
    • http://volpatoebrum.com.br/_common/admin/scripts/ckfinder/userfiles/files/minecraft-free-ios-2021_GM479516143.pdfIn PDF document text
    • http://volpatoebrum.com.br/_common/admin/scripts/ckfinder/userfiles/files/how-to-get-minecraft-for-free-on-mobile_GM479516143.pdfIn PDF document text
    • http://volpatoebrum.com.br/_common/admin/scripts/ckfinder/userfiles/files/free-robux-no-scam_GM431946152.pdfIn PDF document text
    • http://volpatoebrum.com.br/_common/admin/scripts/ckfinder/userfiles/files/free-spins-on-coin-master-2021_GM406889139.pdfIn PDF document text
    • http://volpatoebrum.com.br/_common/admin/scripts/ckfinder/userfiles/files/how-to-get-free-robux-2021-easy_GM431946152.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
font_00_sfnt_off0000282a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x282A 21556 bytes
SHA-256: ae9059fab6f78f4c36e40c580920503cbb3387c18b0b2f031b8acca6dff7a400
font_01_sfnt_off000057ae.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x57AE 19004 bytes
SHA-256: 53c681b56d2aeec96b089841d9ffc48036577cfa01866e40d4f9479265023228

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