Malicious PDF — malware analysis report

Static analysis result for SHA-256 c724b99861af5f12…

MALICIOUS

PDF

35.5 KB Created: 2021-06-27 15:41:07 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-16
MD5: 6ea41a6bf175a7083971e9f628cfb785 SHA-1: 6b834641bcc464bb7452e88c55180e40e1b71a6e SHA-256: c724b99861af5f12ecd36a2f33d9abafd27e830fab4fcc8c42ac80d7702ef9f1
188 Risk Score

Malware Insights

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

The PDF document contains a critical heuristic firing indicating it links to a known malicious redirector disguised as a 'free generator / game hack'. The document body also contains the same URL, reinforcing the lure. The presence of XFA forms and malformed streams suggests exploitation, likely to deliver a malicious payload via the redirector.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

Heuristics 6

  • 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.
  • Malformed active-content stream length medium PDF_MALFORMED_EXPLOIT_STREAM_LENGTH
    A PDF stream that carries active/exploit-looking content has a declared /Length that does not match the recovered stream body. Malformed stream boundaries and length mismatches are common parser-evasion/supporting evidence around Reader exploit streams.
  • XFA form low PDF_XFA
    PDF uses XML Forms Architecture — can contain script logic
  • 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/roblox-mad-city-free-money-game-hack In PDF document text
    • https://katalog.smkn1glagah.sch.id/repository/coin-master-hack-ios-cydia_GM406889139.pdfIn PDF document text
    • https://katalog.smkn1glagah.sch.id//repository/how-to-get-free-roblox-items_GM431946152.pdfIn PDF document text
    • https://katalog.smkn1glagah.sch.id/repository/coin-master-club-hack_GM406889139.pdfIn PDF document text
    • https://katalog.smkn1glagah.sch.id/repository/carlox-hack-de-la-sable-laser-de-goku-oscuro-roblox_GM431946152.pdfIn PDF document text
    • https://katalog.smkn1glagah.sch.id//repository/free-roblox-accounts_GM431946152.pdfIn PDF document text
    • https://katalog.smkn1glagah.sch.id//repository/coin-master-hack-https-coinms-net_GM406889139.pdfIn PDF document text
    • https://katalog.smkn1glagah.sch.id/repository/how-can-i-get-free-spins-on-coin-master_GM406889139.pdfIn PDF document text
    • https://katalog.smkn1glagah.sch.id//repository/how-to-get-minecraft-for-free-on-iphone-2021_GM479516143.pdfIn PDF document text
    • https://katalog.smkn1glagah.sch.id/repository/how-to-get-free-robux-without-hacking-or-human-verification_GM431946152.pdfIn PDF document text
    • https://katalog.smkn1glagah.sch.id//repository/coin-master-2021_GM406889139.pdfIn PDF document text
    • https://katalog.smkn1glagah.sch.id/repository/how-do-you-get-free-robux-on-computer_GM431946152.pdfIn PDF document text
    • https://katalog.smkn1glagah.sch.id/repository/coinmaster-links_GM406889139.pdfIn PDF document text
    • https://katalog.smkn1glagah.sch.id/repository/uprobuxcom-free-robux_GM431946152.pdfIn PDF document text
    • https://katalog.smkn1glagah.sch.id/repository/how-to-hack-roblox-robux-2021-no-survey_GM431946152.pdfIn PDF document text
    • https://katalog.smkn1glagah.sch.id//repository/coin-master-hack-no-survey-2021_GM406889139.pdfIn PDF document text
    • https://katalog.smkn1glagah.sch.id/repository/free-minecraft-account-and-password_GM479516143.pdfIn PDF document text
    • https://katalog.smkn1glagah.sch.id/repository/roblox-free-no-download-unblocked_GM431946152.pdfIn PDF document text
    • https://katalog.smkn1glagah.sch.id/repository/how-to-earn-robux-on-roblox_GM431946152.pdfIn PDF document text
    • https://katalog.smkn1glagah.sch.id//repository/can-you-hack-coin-master_GM406889139.pdfIn PDF document text
    • https://katalog.smkn1glagah.sch.id/repository/coin-master-daily-free-spin-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_off00003212.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x3212 22568 bytes
SHA-256: 14f4cf36739fb3bd3ab36912d4e195991a11a64398173aa2abfedfa1f1e6eaed
font_01_sfnt_off0000649e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x649E 19424 bytes
SHA-256: 585f76d5e14f713b17d9c6b7cbcda310ab53824682ef4e3e57da727c390ae11d

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