Malicious PDF — malware analysis report

Static analysis result for SHA-256 5074bda2509bb655…

MALICIOUS

PDF

48.9 KB Created: 2021-06-03 06:05:04 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-27
MD5: 626bc9db99b1d44c346934db40b46443 SHA-1: c4a1d58038fef12147c22c5ad0a357c8b99e3425 SHA-256: 5074bda2509bb655502d266a2c595fd94cdd442dd928edde8a3d608937aff2c9
102 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document contains numerous embedded URLs that form a link farm, likely intended to direct users to malicious content or downloads. The document body and extracted URLs suggest a lure related to 'free Robux' and in-game items, a common tactic for phishing or malware distribution. The ML classifier strongly indicated maliciousness, supporting the assessment of a malicious download or redirection attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9871

Heuristics 4

  • 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
  • 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.online/app/431946152/free-robux-2021-code-jamais-utiliser-game-hack PDF link annotation
    • http://digilib-ppsunisma.ac.id/repository/how-to-get-free-followers-on-tiktok-without-verification_GM835599320.pdfIn PDF document text
    • http://digilib-ppsunisma.ac.id/repository/free-fire-coin-master_GM406889139.pdfIn PDF document text
    • http://digilib-ppsunisma.ac.id/repository/free-robux-redeem-codes-2021_GM431946152.pdfIn PDF document text
    • http://digilib-ppsunisma.ac.id/repository/coin-master-free_GM406889139.pdfIn PDF document text
    • http://digilib-ppsunisma.ac.id/repository/how-to-get-free-robux-without-verifying-2021_GM431946152.pdfIn PDF document text
    • http://digilib-ppsunisma.ac.id/repository/free-robux-generator-no-survey_GM431946152.pdfIn PDF document text
    • http://digilib-ppsunisma.ac.id/repository/get-me-robux-for-free_GM431946152.pdfIn PDF document text
    • http://digilib-ppsunisma.ac.id/repository/coin-master-fun-free-spins_GM406889139.pdfIn PDF document text
    • http://digilib-ppsunisma.ac.id/repository/how-do-you-get-free-robux-without-paying_GM431946152.pdfIn PDF document text
    • http://digilib-ppsunisma.ac.id/repository/coin-master-free-soins_GM406889139.pdfIn PDF document text
    • http://digilib-ppsunisma.ac.id/repository/how-to-get-free-hair-on-roblox_GM431946152.pdfIn PDF document text
    • http://digilib-ppsunisma.ac.id/repository/games-that-can-be-hacked_GM431946152.pdfIn PDF document text
    • http://digilib-ppsunisma.ac.id/repository/daily-coin-master-spins_GM406889139.pdfIn PDF document text
    • http://digilib-ppsunisma.ac.id/repository/fb-coin-master-hack_GM406889139.pdfIn PDF document text
    • http://digilib-ppsunisma.ac.id/repository/free-daily-spins-coin-master_GM406889139.pdfIn PDF document text
    • http://digilib-ppsunisma.ac.id/repository/www-coin-master-hack-tk_GM406889139.pdfIn PDF document text
    • http://digilib-ppsunisma.ac.id/repository/free-roblox-accounts-with-robux-that-work-not-banned-2021_GM431946152.pdfIn PDF document text
    • http://digilib-ppsunisma.ac.id/repository/is-there-a-way-to-get-free-robux_GM431946152.pdfIn PDF document text
    • http://digilib-ppsunisma.ac.id/repository/free-roblox-money_GM431946152.pdfIn PDF document text
    • http://digilib-ppsunisma.ac.id/repository/free-spins-coin-master-2021-today_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
stream_004_off0000511e.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x511E 30912 bytes
SHA-256: fc83ce7cc586ff4428363c92c16b935b798ff9ef912aab78def3dbe00cbdbfbd
font_01_sfnt_off0000984e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x984E 19728 bytes
SHA-256: 2686c1da6e523bef304cc464516b81fa5503799a3638a7a9e9403f5d127fde66

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