Malicious PDF — malware analysis report

Static analysis result for SHA-256 4d33911a4a24e830…

MALICIOUS

PDF

34.5 KB Created: 2021-07-04 22:35:39 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-13
MD5: 487d0014f48b83724ccceef5ca5129a2 SHA-1: c8c4389e96f7ab144d797fbe3aaede385add990d SHA-256: 4d33911a4a24e8302cbba9e3d7ddf035407f1c24c41db9716c6640f9ff94352a
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document employs a common lure for free game currency and hacks, specifically targeting Robux and Coin Master. It contains multiple embedded URLs that lead to redirectors and further document lures, indicating a phishing or scam campaign. The ML classifier strongly flagged this PDF as malicious, and the presence of redirector links confirms malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

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-thumbnail-game-hack In PDF document text
    • http://www.salwangurgaon.com/files/free-coins-and-spins-coin-master-2021_GM406889139.pdfIn PDF document text
    • http://www.salwangurgaon.com/files/roblox-free-robux_GM431946152.pdfIn PDF document text
    • http://www.salwangurgaon.com/files/charectaer-robux-hack-in-youtube_GM431946152.pdfIn PDF document text
    • http://www.salwangurgaon.com/files/spin-free-coin-master_GM406889139.pdfIn PDF document text
    • http://www.salwangurgaon.com/files/coin-master-hack-2021-free_GM406889139.pdfIn PDF document text
    • http://www.salwangurgaon.com/files/how-do-u-get-free-robux_GM431946152.pdfIn PDF document text
    • http://www.salwangurgaon.com/files/free-robux-accounts-usernames-and-passwords_GM431946152.pdfIn PDF document text
    • http://www.salwangurgaon.com/files/roblox-admin-hack_GM431946152.pdfIn PDF document text
    • http://www.salwangurgaon.com/files/how-to-free-robux_GM431946152.pdfIn PDF document text
    • http://www.salwangurgaon.com/files/coin-master-free-spins-without-human-verification_GM406889139.pdfIn PDF document text
    • http://www.salwangurgaon.com/files/robux-cheat_GM431946152.pdfIn PDF document text
    • http://www.salwangurgaon.com/files/como-hackear-cuentas-en-roblox_GM431946152.pdfIn PDF document text
    • http://www.salwangurgaon.com/files/free-robux-no-gift-card_GM431946152.pdfIn PDF document text
    • http://www.salwangurgaon.com/files/coin-coin-master-hack_GM406889139.pdfIn PDF document text
    • http://www.salwangurgaon.com/files/free-roblox-accounts-with-builders-club_GM431946152.pdfIn PDF document text
    • http://www.salwangurgaon.com/files/hack-download_GM431946152.pdfIn PDF document text
    • http://www.salwangurgaon.com/files/roblox-cheat-tool_GM431946152.pdfIn PDF document text
    • http://www.salwangurgaon.com/files/master-game_GM406889139.pdfIn PDF document text
    • http://www.salwangurgaon.com/files/coin-master-free-spins-moonactive_GM406889139.pdfIn PDF document text
    • http://www.salwangurgaon.com/files/coin-master-free-spin-link-app_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
font_00_sfnt_off0000306b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x306B 22064 bytes
SHA-256: 09dae107e70708b67c4d5c36b79002a14f7ce0cf41ab26e8dd5771eb22b2d0db
font_01_sfnt_off00006130.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6130 19336 bytes
SHA-256: adbfa614176d12f8fda67e6e8d5b73dbc28431768a4cac05a3d314a7f167f1c3

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