Malicious PDF — malware analysis report

Static analysis result for SHA-256 8e1954d270c61326…

MALICIOUS

PDF

35.1 KB Created: 2021-06-25 21:09:56 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-11-20
MD5: 27f7f9889b9571510261cd1025e4c5fb SHA-1: 301f4e7ea3bd5448168fe5624d7c59bba0f1e88f SHA-256: 8e1954d270c61326b59cc0b7abc4660780423250aa324372c5586ae6112e0572
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains a prominent link disguised as a game hack, which is identified as a malicious redirector. The document body and heuristics indicate a lure to download a file, likely leading to malware. No scripts were extracted, but the embedded URL is the primary indicator of malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

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 http://netcdn.co/app/431946152/hacks-de-roblox-booga-booga-game-hack In PDF document text
    • https://repository.stikesindramayu.ac.id/repository/websites-that-give-you-free-robux_GM431946152.pdfIn PDF document text
    • https://repository.stikesindramayu.ac.id/repository/best-free-alternatives-to-roblox_GM431946152.pdfIn PDF document text
    • https://repository.stikesindramayu.ac.id/repository/hack-coin-master-for-free_GM406889139.pdfIn PDF document text
    • https://repository.stikesindramayu.ac.id/repository/how-do-you-earn-robux_GM431946152.pdfIn PDF document text
    • https://repository.stikesindramayu.ac.id/repository/free-roblox-hack-download-2021_GM431946152.pdfIn PDF document text
    • https://repository.stikesindramayu.ac.id/repository/how-to-get-free-robux-not-a-scam_GM431946152.pdfIn PDF document text
    • https://repository.stikesindramayu.ac.id/repository/free-robux-hack-no-verification-or-survey-2021_GM431946152.pdfIn PDF document text
    • https://repository.stikesindramayu.ac.id/repository/pokemon-go-free-xp_GM1094591345.pdfIn PDF document text
    • https://repository.stikesindramayu.ac.id/repository/robux-earning-websites_GM431946152.pdfIn PDF document text
    • https://repository.stikesindramayu.ac.id/repository/free-robux-gift-card_GM431946152.pdfIn PDF document text
    • https://repository.stikesindramayu.ac.id/repository/free-robux-by-bananaman-world_GM431946152.pdfIn PDF document text
    • https://repository.stikesindramayu.ac.id/repository/free-coin-master-spins-without-human-verification_GM406889139.pdfIn PDF document text
    • https://repository.stikesindramayu.ac.id/repository/coin-master-twitter_GM406889139.pdfIn PDF document text
    • https://repository.stikesindramayu.ac.id/repository/codes-to-get-free-robux_GM431946152.pdfIn PDF document text
    • https://repository.stikesindramayu.ac.id/repository/free-roblox-hack_GM431946152.pdfIn PDF document text
    • https://repository.stikesindramayu.ac.id/repository/comment-avoir-des-robux-gratuitement-no-hack_GM431946152.pdfIn PDF document text
    • https://repository.stikesindramayu.ac.id/repository/how-to-get-free-robux-without-downloading-any-apps_GM431946152.pdfIn PDF document text
    • https://repository.stikesindramayu.ac.id/repository/coin-master-free-bonus_GM406889139.pdfIn PDF document text
    • https://repository.stikesindramayu.ac.id/repository/robuxian-free-robux-hack-script_GM431946152.pdfIn PDF document text
    • https://repository.stikesindramayu.ac.id/repository/roblox-game-hack-download_GM431946152.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_off00003256.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x3256 22504 bytes
SHA-256: 4854c11af7ab4d788c4d8d523aeab81a57f4ced44f0ba5305fcc37e648ad845b
font_01_sfnt_off000064a4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x64A4 18824 bytes
SHA-256: 71ace5bd6e0d1a7240981eee6a8d1cc957659acd06362b40b7fdd574fc2f642c

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