Malicious PDF — malware analysis report

Static analysis result for SHA-256 4e4de66357eeb75a…

MALICIOUS

PDF

46.1 KB Created: 2021-06-02 01:36:11 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-17
MD5: e9d9e6fc66e34d7bd0b45d51625f53c1 SHA-1: cc76cb27a97a6f3f20851556af07deeadce5c984 SHA-256: 4e4de66357eeb75a37da4b1e8eadc7477384ce661d155beee0fbcc5c00d05d46
142 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous links to external websites, many of which are presented as 'free generators' or 'game hacks' for popular games like Roblox. The heuristic 'PDF_SEO_LINK_FARM' indicates a large number of such links, suggesting a malicious intent to drive traffic to potentially harmful sites. The ML classifier also strongly flagged this PDF as malicious.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9864

Heuristics 5

  • 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.
  • PDF links to a 'free generator / game hack' redirector high 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.
  • 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
  • External URI info PDF_URI
    PDF contains an external URL action
  • 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.xyz/app/431946152/how-to-get-in-to-hacked-roblox-account-game-hack PDF link annotation
    • https://priveecard.com/wp-content/uploads/fsqm-files/roblox-hack-bugmenot_GM431946152.pdfIn PDF document text
    • https://priveecard.com/wp-content/uploads/fsqm-files/free-ways-to-get-robux_GM431946152.pdfIn PDF document text
    • https://priveecard.com/wp-content/uploads/fsqm-files/if-everything-on-roblox-was-free_GM431946152.pdfIn PDF document text
    • https://priveecard.com/wp-content/uploads/fsqm-files/free-unused-roblox-card-codes-2021_GM431946152.pdfIn PDF document text
    • https://priveecard.com/wp-content/uploads/fsqm-files/was-minecraft-ever-free_GM479516143.pdfIn PDF document text
    • https://priveecard.com/wp-content/uploads/fsqm-files/how-to-get-free-tiktok-coins_GM835599320.pdfIn PDF document text
    • https://priveecard.com/wp-content/uploads/fsqm-files/real-way-to-get-free-robux-2021_GM431946152.pdfIn PDF document text
    • https://priveecard.com/wp-content/uploads/fsqm-files/free-minecraft-printables_GM479516143.pdfIn PDF document text
    • https://priveecard.com/wp-content/uploads/fsqm-files/how-to-get-free-robux-2021-no-human-verification_GM431946152.pdfIn PDF document text
    • https://priveecard.com/wp-content/uploads/fsqm-files/roblox-free-ssscripts_GM431946152.pdfIn PDF document text
    • https://priveecard.com/wp-content/uploads/fsqm-files/coin-master-free-spins-promo-code_GM406889139.pdfIn PDF document text
    • https://priveecard.com/wp-content/uploads/fsqm-files/free-roblox-accounts-with-robux_GM431946152.pdfIn PDF document text
    • https://priveecard.com/wp-content/uploads/fsqm-files/prokjs-free-robux_GM431946152.pdfIn PDF document text
    • https://priveecard.com/wp-content/uploads/fsqm-files/free-roblox-exploits-2021-not-blocked-by-antivirus_GM431946152.pdfIn PDF document text
    • https://priveecard.com/wp-content/uploads/fsqm-files/roblox-synapse-exploit-free-cracked_GM431946152.pdfIn PDF document text
    • https://priveecard.com/wp-content/uploads/fsqm-files/blox-fish-free-robux_GM431946152.pdfIn PDF document text
    • https://priveecard.com/wp-content/uploads/fsqm-files/roblox-hack-download-no-survey-no-password_GM431946152.pdfIn PDF document text
    • https://priveecard.com/wp-content/uploads/fsqm-files/how-to-hack-survoivr-in-roblox-pc_GM431946152.pdfIn PDF document text
    • https://priveecard.com/wp-content/uploads/fsqm-files/how-to-hack-roblox-accounts-2021_GM431946152.pdfIn PDF document text
    • https://priveecard.com/wp-content/uploads/fsqm-files/free-minecraft-alt-generator_GM479516143.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
stream_004_off000051e2.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x51E2 26812 bytes
SHA-256: 22e5fd4f23a71b7addc697726bc0dc052dfb864d4c2c9005a8ab54524f1296ce
font_01_sfnt_off00009022.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9022 18764 bytes
SHA-256: 976a38f615d04214f140d2d364f716f7d45d784a3f98a684c567807a92205718

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