Malicious PDF — malware analysis report

Static analysis result for SHA-256 081b5d57d72f1e69…

MALICIOUS

PDF

35.5 KB Created: 2021-07-03 18:41:21 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-18
MD5: 18ddc7566079cddaf88919c9bc176380 SHA-1: 9dc52ba4728b88ca1be547b0da5b6f3d97868331 SHA-256: 081b5d57d72f1e694d3ff045dad0cd8fbe6fb59690995783e8b7e5f08f8a258d
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document was flagged as malicious by an ML classifier. The file routes users through malicious redirector infrastructure and presents a deceptive download button. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

Heuristics 4

  • 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 http://netcdn.tw/app/406889139/free-coin-master-glitches-game-hack PDF link annotation
    • https://library.itn.ac.id/perpusitn/repository/free-robux-500_GM431946152.pdfIn PDF document text
    • https://library.itn.ac.id/perpusitn/repository/roblox-hack-com_GM431946152.pdfIn PDF document text
    • https://library.itn.ac.id/perpusitn/repository/mobihack-roblox-hack_GM431946152.pdfIn PDF document text
    • https://library.itn.ac.id/perpusitn/repository/best-roblox-games-with-free-radio_GM431946152.pdfIn PDF document text
    • https://library.itn.ac.id/perpusitn/repository/roblox-robux_GM431946152.pdfIn PDF document text
    • https://library.itn.ac.id/perpusitn/repository/robux-websites-that-work_GM431946152.pdfIn PDF document text
    • https://library.itn.ac.id/perpusitn/repository/robux-place-rewards_GM431946152.pdfIn PDF document text
    • https://library.itn.ac.id/perpusitn/repository/roblox-admin-hack_GM431946152.pdfIn PDF document text
    • https://library.itn.ac.id/perpusitn/repository/robux-free-promo-codes_GM431946152.pdfIn PDF document text
    • https://library.itn.ac.id/perpusitn/repository/roblox-promo-codes-generator-no-human-verification_GM431946152.pdfIn PDF document text
    • https://library.itn.ac.id/perpusitn/repository/roblox-join-anyone-hack_GM431946152.pdfIn PDF document text
    • https://library.itn.ac.id/perpusitn/repository/coin-master-free-spins-link-today-new-2021_GM406889139.pdfIn PDF document text
    • https://library.itn.ac.id/perpusitn/repository/free-bc-generator-roblox_GM431946152.pdfIn PDF document text
    • https://library.itn.ac.id/perpusitn/repository/join-group-and-get-free-robux_GM431946152.pdfIn PDF document text
    • https://library.itn.ac.id/perpusitn/repository/roblox-free-robux-no-survey-no-save-no-subscription_GM431946152.pdfIn PDF document text
    • https://library.itn.ac.id/perpusitn/repository/free-download-coin-master_GM406889139.pdfIn PDF document text
    • https://library.itn.ac.id/perpusitn/repository/free-roblox-avatar-ideas_GM431946152.pdfIn PDF document text
    • https://library.itn.ac.id/perpusitn/repository/how-do-you-get-roblox-money_GM431946152.pdfIn PDF document text
    • https://library.itn.ac.id/perpusitn/repository/oprewards-com-robux_GM431946152.pdfIn PDF document text
    • https://library.itn.ac.id/perpusitn/repository/free-admin-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_off000035c1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x35C1 22780 bytes
SHA-256: d766d7825b6b9e664c3e370c80379c5e2855efcc1ae832a74fa13784d4b1a8d0
font_01_sfnt_off000068ab.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x68AB 18236 bytes
SHA-256: 32454488b94d40b33c85f556b3341724b540995c802518b1745c1de9dd89cb1f

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