Malicious PDF — malware analysis report

Static analysis result for SHA-256 2232489a78325c0e…

MALICIOUS

PDF

44.7 KB Created: 2021-06-08 22:48:59 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-27
MD5: 7c8a8e6eda7d9fd6e27b69cfcbbd0102 SHA-1: f69bbc82d25dd12bb52ebef256f5a4fc113769ff SHA-256: 2232489a78325c0e22712040307d1568cb795b874f6f48e68782506ce76fd08e
168 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple links to a known malicious redirector, disguised as a 'free generator' or 'game hack' lure. The document body and embedded URLs reinforce this theme, aiming to trick users into clicking through to potentially malicious sites. While no scripts were explicitly extracted, the PDF structure and heuristic firings strongly indicate a malicious redirector workflow.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9865

Heuristics 5

  • 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.
  • Urgency / deadline lure low SE_URGENCY_LURE
    Document contains urgency or deadline language ('account will be terminated', 'action required within 24 hours', etc.) — useful context, but low-signal without other findings
  • 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.tw/app/431946152/free-roblox-card-codes-2021-not-used-game-hack In PDF document text
    • http://library.itekes-bali.ac.id/repository/free-robux-picture_GM431946152.pdfIn PDF document text
    • http://library.itekes-bali.ac.id/repository/freespinandcoin-blogspot-coin-master_GM406889139.pdfIn PDF document text
    • http://library.itekes-bali.ac.id/repository/free-coins-coin-master-link-today_GM406889139.pdfIn PDF document text
    • http://library.itekes-bali.ac.id/repository/free-robux-games-that-actually-work-2021_GM431946152.pdfIn PDF document text
    • http://library.itekes-bali.ac.id/repository/coin-master-link-daily-get-free-spins-amp_GM406889139.pdfIn PDF document text
    • http://library.itekes-bali.ac.id/repository/pubg-uc-with-paypal_GM1330123889.pdfIn PDF document text
    • http://library.itekes-bali.ac.id/repository/coin-master-hacks-for-iphone_GM406889139.pdfIn PDF document text
    • http://library.itekes-bali.ac.id/repository/roblox-free-robux-generator-no-human-verification-2021_GM431946152.pdfIn PDF document text
    • http://library.itekes-bali.ac.id/repository/coin-master-free-spin-whatsapp-group_GM406889139.pdfIn PDF document text
    • http://library.itekes-bali.ac.id/repository/free-robux-easy-and-fast_GM431946152.pdfIn PDF document text
    • http://library.itekes-bali.ac.id/repository/near-tiktok-free-view_GM835599320.pdfIn PDF document text
    • http://library.itekes-bali.ac.id/repository/free-robux-gift-card_GM431946152.pdfIn PDF document text
    • http://library.itekes-bali.ac.id/repository/free-roblox-gift-card_GM431946152.pdfIn PDF document text
    • http://library.itekes-bali.ac.id/repository/free-games-like-coin-master_GM406889139.pdfIn PDF document text
    • http://library.itekes-bali.ac.id/repository/mosttechs-coin-master-free-spins_GM406889139.pdfIn PDF document text
    • http://library.itekes-bali.ac.id/repository/free-roblox-premium_GM431946152.pdfIn PDF document text
    • http://library.itekes-bali.ac.id/repository/coin-master-hack-version-download-2021_GM406889139.pdfIn PDF document text
    • http://library.itekes-bali.ac.id/repository/free-face-roblox_GM431946152.pdfIn PDF document text
    • http://library.itekes-bali.ac.id/repository/bux-free-robux_GM431946152.pdfIn PDF document text
    • http://library.itekes-bali.ac.id/repository/how-to-get-free-robux_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_off000050d1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x50D1 24900 bytes
SHA-256: ab0b8c5d786cd7faa327c8bf56d48eb1537c23681f9510f9d6b6dd19a61a879a
font_01_sfnt_off00008970.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8970 19044 bytes
SHA-256: a939f35e92f8e505f51d0598c36a6068febcb6f808dac93bf4a11c852b49933b

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