Malicious PDF — malware analysis report

Static analysis result for SHA-256 628d23086c6661e3…

MALICIOUS

PDF

49.5 KB Created: 2021-06-10 19:50:41 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-27
MD5: 3231c4730c9585a65f9a728a02b38442 SHA-1: 2246d6dbb23a6b504fd00548677f4a406b9b46a1 SHA-256: 628d23086c6661e3e80b6e241c8afc693d2cc1249f2d114e1c91311391f59b85
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF document contains embedded URLs and text that lure users with promises of free Robux and game hacks, indicating a phishing or scam attempt. The presence of external URIs and the ML classifier's high confidence score suggest the document is designed to lead users to malicious content, likely a second-stage download. No scripts were extracted, but the document body and heuristics point towards a social engineering attack.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9849

Heuristics 4

  • Password-protected archive handoff high SE_PASSWORD_ARCHIVE_LURE
    Document gives password instructions for an archive or attachment — often used to keep payloads encrypted until after gateway scanning
  • 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
  • External URI info PDF_URI
    PDF contains an external URL action
  • 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.tw/app/431946152/free-robux-using-javascript-game-hack PDF link annotation
    • http://nod74.ru/images/spin-free-coin-master_GM406889139.pdfIn PDF document text
    • http://nod74.ru/images/coin-master-free-spins-link-today-facebook_GM406889139.pdfIn PDF document text
    • http://nod74.ru/images/free-robux-link_GM431946152.pdfIn PDF document text
    • http://nod74.ru/images/free-robux-codes-not-used_GM431946152.pdfIn PDF document text
    • http://nod74.ru/images/how-to-get-hacks-on-minecraft_GM479516143.pdfIn PDF document text
    • http://nod74.ru/images/hacks-for-roblox-rocitizens_GM431946152.pdfIn PDF document text
    • http://nod74.ru/images/how-do-you-get-minecraft-for-free_GM479516143.pdfIn PDF document text
    • http://nod74.ru/images/to-get-free-robux_GM431946152.pdfIn PDF document text
    • http://nod74.ru/images/coin-spin-link_GM406889139.pdfIn PDF document text
    • http://nod74.ru/images/free-robux-hack_GM431946152.pdfIn PDF document text
    • http://nod74.ru/images/how-to-get-free-robux-2021-no-human-verification_GM431946152.pdfIn PDF document text
    • http://nod74.ru/images/coin-master-hack-mod-apk-download_GM406889139.pdfIn PDF document text
    • http://nod74.ru/images/how-to-get-free-robux-without-verification-2021_GM431946152.pdfIn PDF document text
    • http://nod74.ru/images/free-minecraft-account_GM479516143.pdfIn PDF document text
    • http://nod74.ru/images/coin-master-hack-spins_GM406889139.pdfIn PDF document text
    • http://nod74.ru/images/coin-master-hack-without-human-verification-2021_GM406889139.pdfIn PDF document text
    • http://nod74.ru/images/spin-rewards-coin-master_GM406889139.pdfIn PDF document text
    • http://nod74.ru/images/how-to-hack-roblox-2021_GM431946152.pdfIn PDF document text
    • http://nod74.ru/images/hack-roblox-accounts-password-traced_GM431946152.pdfIn PDF document text
    • http://nod74.ru/images/fbchampion-com_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_004_off000051c1.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x51C1 31784 bytes
SHA-256: e64c0207a88500038e63bf8a12b76f3fe023f2515e254f8011a5a9271456371f
font_01_sfnt_off00009bfe.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9BFE 19396 bytes
SHA-256: 172f8a60b145979b38c17077b8e5ee1c779fbd95410585b1330a569f7cb02e14

Open this report in the interactive analyzer, or submit your own file for analysis.