Malicious PDF — malware analysis report

Static analysis result for SHA-256 ba1e4e309404342b…

MALICIOUS

PDF

49.1 KB Created: 2021-06-03 13:47:23 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-31
MD5: 39a71860ddf211ca9944391edcd54cbd SHA-1: 330bfefb0d3e38b9f30c90f0d131ca065e6d1535 SHA-256: ba1e4e309404342b48fa9811a309513d110ea8af8848d7f420988b6e23ad3d24
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple links that redirect to a malicious domain, masquerading as a 'free generator' or 'game hack'. The document body and heuristics indicate a lure for free in-game currency or cheats, which is a common social engineering tactic. The embedded URLs are the primary indicators of malicious activity, leading to a known malicious redirector.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9796

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 https://netcdn.online/app/431946152/how-to-get-free-robux-with-inspect-element-2021-game-hack In PDF document text
    • http://www.vetmed.fkh.unair.ac.id/repository/get-free-cards-for-coin-master_GM406889139.pdfIn PDF document text
    • http://vetmed.fkh.unair.ac.id/repository/free-robux-com-2021_GM431946152.pdfIn PDF document text
    • http://www.vetmed.fkh.unair.ac.id/repository/free-robux-codes-2021-real_GM431946152.pdfIn PDF document text
    • http://www.vetmed.fkh.unair.ac.id/repository/unlimited-free-spins-coin-master_GM406889139.pdfIn PDF document text
    • http://vetmed.fkh.unair.ac.id/repository/coin-master-free-spins-2021_GM406889139.pdfIn PDF document text
    • http://vetmed.fkh.unair.ac.id/repository/how-to-hack-and-get-free-robux_GM431946152.pdfIn PDF document text
    • http://vetmed.fkh.unair.ac.id/repository/free-coin-coin-master_GM406889139.pdfIn PDF document text
    • http://www.vetmed.fkh.unair.ac.id/repository/hack-coin-master-free_GM406889139.pdfIn PDF document text
    • http://www.vetmed.fkh.unair.ac.id/repository/minecraft-hack-client-download_GM479516143.pdfIn PDF document text
    • http://vetmed.fkh.unair.ac.id/repository/free-spins-for-coin-master-hack_GM406889139.pdfIn PDF document text
    • http://www.vetmed.fkh.unair.ac.id/repository/how-to-get-free-robux-without-downloading-any-apps_GM431946152.pdfIn PDF document text
    • http://vetmed.fkh.unair.ac.id/repository/free-roblox-shirt-templates_GM431946152.pdfIn PDF document text
    • http://vetmed.fkh.unair.ac.id/repository/how-to-get-minecraft-pe-for-free_GM479516143.pdfIn PDF document text
    • http://vetmed.fkh.unair.ac.id/repository/coin-master-free-spins-2021-app_GM406889139.pdfIn PDF document text
    • http://vetmed.fkh.unair.ac.id/repository/coin-master-free-spins-daily_GM406889139.pdfIn PDF document text
    • http://www.vetmed.fkh.unair.ac.id/repository/roblox-free-robux-website_GM431946152.pdfIn PDF document text
    • http://www.vetmed.fkh.unair.ac.id/repository/roblox-arsenal-hack_GM431946152.pdfIn PDF document text
    • http://vetmed.fkh.unair.ac.id/repository/free-robux-with-no-verification-2021_GM431946152.pdfIn PDF document text
    • http://www.vetmed.fkh.unair.ac.id/repository/real-free-robux-codes_GM431946152.pdfIn PDF document text
    • http://vetmed.fkh.unair.ac.id/repository/free-coins-coin-master_GM406889139.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000533a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x533A 25580 bytes
SHA-256: 8e1656ff4806f06d09123f0d6fa71bd079a30a89338e989b8756d365de9f7e35
font_01_sfnt_off00008ee8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8EE8 3016 bytes
SHA-256: 63aa1324eea2596d97c053612205c875310fc09f6ccd1c31fdd002fbadf38d44
font_02_sfnt_off0000994c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x994C 19680 bytes
SHA-256: bc2dbac8efc5a8514fea072338410436de761ad3c4e2df826870a62178a4430d

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