Malicious PDF — malware analysis report

Static analysis result for SHA-256 8015d3bcd12f91d6…

MALICIOUS

PDF

34.5 KB Created: 2021-07-04 01:41:48 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-11-22
MD5: ab9ebfbc370fb541f7a495625c27aab5 SHA-1: f30a46fe0df0c952f183f1070213330202202a6a SHA-256: 8015d3bcd12f91d660bbab10b6e4f1efcb4b8aa669bb0950403a5b052a27bb95
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple links, including one to http://netcdn.tw/app/431946152/free-robux-by-watching-ads-game-hack, which is flagged as malicious redirector infrastructure. The document body and embedded URLs suggest a lure for free Robux or game hacks, a common social engineering tactic. While no scripts were explicitly extracted, the presence of embedded URLs and the nature of the lure indicate a phishing or scam attempt, likely delivered as a spearphishing attachment.

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-by-watching-ads-game-hack In PDF document text
    • https://www.dc-itsolutions.com/userfiles/files/how-to-hack-roblox_GM431946152.pdfIn PDF document text
    • https://www.dc-itsolutions.com/userfiles/files/how-to-get-free-robux-com_GM431946152.pdfIn PDF document text
    • https://www.dc-itsolutions.com/userfiles/files/robux-free-online_GM431946152.pdfIn PDF document text
    • https://www.dc-itsolutions.com/userfiles/files/dragon-simulator-roblox-hack_GM431946152.pdfIn PDF document text
    • https://www.dc-itsolutions.com/userfiles/files/how-do-you-get-roblox-money_GM431946152.pdfIn PDF document text
    • https://www.dc-itsolutions.com/userfiles/files/free-roblox-coders_GM431946152.pdfIn PDF document text
    • https://www.dc-itsolutions.com/userfiles/files/coin-master-free-spins-and-coins-haktuts_GM406889139.pdfIn PDF document text
    • https://www.dc-itsolutions.com/userfiles/files/free-spins-coin-master-november-2021_GM406889139.pdfIn PDF document text
    • https://www.dc-itsolutions.com/userfiles/files/games-to-get-free-robux-2021_GM431946152.pdfIn PDF document text
    • https://www.dc-itsolutions.com/userfiles/files/coin-master-free-spins-generator_GM406889139.pdfIn PDF document text
    • https://www.dc-itsolutions.com/userfiles/files/roblox-trade-free_GM431946152.pdfIn PDF document text
    • https://www.dc-itsolutions.com/userfiles/files/roblox-robux-hack-generator_GM431946152.pdfIn PDF document text
    • https://www.dc-itsolutions.com/userfiles/files/coin-master-cheats-free_GM406889139.pdfIn PDF document text
    • https://www.dc-itsolutions.com/userfiles/files/free-robux-quiz_GM431946152.pdfIn PDF document text
    • https://www.dc-itsolutions.com/userfiles/files/free-minecraft-windows-10-account_GM479516143.pdfIn PDF document text
    • https://www.dc-itsolutions.com/userfiles/files/free-spins-coin-master-links-2021_GM406889139.pdfIn PDF document text
    • https://www.dc-itsolutions.com/userfiles/files/how-to-get-free-robux-no-human-verification_GM431946152.pdfIn PDF document text
    • https://www.dc-itsolutions.com/userfiles/files/coin-master-free-spins-only_GM406889139.pdfIn PDF document text
    • https://www.dc-itsolutions.com/userfiles/files/www-bandicam-com-free-robux_GM431946152.pdfIn PDF document text
    • https://www.dc-itsolutions.com/userfiles/files/haktuts-coin-master-free-daily-spins_GM406889139.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_off00002e17.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2E17 22296 bytes
SHA-256: 590b62c353585fbb6d947c75b90c5dbdca83be744a6e4971c8754d3256aacf4e
font_01_sfnt_off00005fd6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5FD6 19660 bytes
SHA-256: f0cdf6166c464805662a9cde01402bcc449eb6222422d9d5af766ad530424c87

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