Malicious PDF — malware analysis report

Static analysis result for SHA-256 f054d0f1a36d1505…

MALICIOUS

PDF

34.4 KB Created: 2021-06-18 02:04:16 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-11-23
MD5: 8f108652d0ef228db68419fee9776e07 SHA-1: 052f3935a98eaa4f47378b5a0c7d9b92c429114b SHA-256: f054d0f1a36d15050435c643bd41fba909962d270eec4bc705548b45bf935716
220 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains numerous links to external sites, including a known malicious redirector at http://netcdn.co/app/431946152/free-robux-only-username-and-password-game-hack. The document body and heuristics indicate a lure for game-related cheats or currency, likely intended to lead users to phishing or malware download sites. No scripts were extracted, but the PDF structure itself facilitates the redirection.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

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.
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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.co/app/431946152/free-robux-only-username-and-password-game-hack In PDF document text
    • http://www.goaheadmigration.com/uploaded_files/userfiles/files/how-to-get-free-robux-leah-ashe_GM431946152.pdfIn PDF document text
    • http://www.goaheadmigration.com/uploaded_files/userfiles/files/app-store-coin-master-free-spins_GM406889139.pdfIn PDF document text
    • http://www.goaheadmigration.com/uploaded_files/userfiles/files/coin-master-daily-link_GM406889139.pdfIn PDF document text
    • http://www.goaheadmigration.com/uploaded_files/userfiles/files/free-coins-coin-master-2021_GM406889139.pdfIn PDF document text
    • http://www.goaheadmigration.com/uploaded_files/userfiles/files/real-robux_GM431946152.pdfIn PDF document text
    • http://www.goaheadmigration.com/uploaded_files/userfiles/files/free-roblox-accounts-with-robux-that-work-2021_GM431946152.pdfIn PDF document text
    • http://www.goaheadmigration.com/uploaded_files/userfiles/files/how-to-change-roblox-username-for-free_GM431946152.pdfIn PDF document text
    • http://www.goaheadmigration.com/uploaded_files/userfiles/files/pokemon-go-free-level-40-account_GM1094591345.pdfIn PDF document text
    • http://www.goaheadmigration.com/uploaded_files/userfiles/files/master-coin-free-spin_GM406889139.pdfIn PDF document text
    • http://www.goaheadmigration.com/uploaded_files/userfiles/files/work-in-a-pizza-place-roblox-swim-cheats_GM431946152.pdfIn PDF document text
    • http://www.goaheadmigration.com/uploaded_files/userfiles/files/coin-master-free-download-app_GM406889139.pdfIn PDF document text
    • http://www.goaheadmigration.com/uploaded_files/userfiles/files/roblox-robux-hack-2021-no-survey-no-download_GM431946152.pdfIn PDF document text
    • http://www.goaheadmigration.com/uploaded_files/userfiles/files/pokemon-go-free-hack-download_GM1094591345.pdfIn PDF document text
    • http://www.goaheadmigration.com/uploaded_files/userfiles/files/coin-master-free-spins-link-2021-today_GM406889139.pdfIn PDF document text
    • http://www.goaheadmigration.com/uploaded_files/userfiles/files/minecraft-aimbot_GM479516143.pdfIn PDF document text
    • http://www.goaheadmigration.com/uploaded_files/userfiles/files/roblox-elemental-battlegrounds-hacks-win10-2021_GM431946152.pdfIn PDF document text
    • http://www.goaheadmigration.com/uploaded_files/userfiles/files/roblox-rape-hack_GM431946152.pdfIn PDF document text
    • http://www.goaheadmigration.com/uploaded_files/userfiles/files/coin-master-free-spins-coins_GM406889139.pdfIn PDF document text
    • http://www.goaheadmigration.com/uploaded_files/userfiles/files/roblox-hack-apk_GM431946152.pdfIn PDF document text
    • http://www.goaheadmigration.com/uploaded_files/userfiles/files/free-coin-master-spins-blog_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_off00003098.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x3098 21384 bytes
SHA-256: 9ab2fc587f85c07e3b562b177f3e52fa3df82a240c8e60f8a5d0fe6f118a9afd
font_01_sfnt_off00005f6b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5F6B 19724 bytes
SHA-256: b1a1bf602f0fd39cf88fd0ca722e9b6168af2da6dc895b8bf7e391349aa518ac

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