Malicious PDF — malware analysis report

Static analysis result for SHA-256 0983c43742f3ffc1…

MALICIOUS

PDF

48.7 KB Created: 2021-06-07 09:49:14 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-29
MD5: ac8846214b3c2c8e1c8bcc8c1ce52885 SHA-1: 0bbdca361908d8cc76064e5f4dbf27610af4e3fe SHA-256: 0983c43742f3ffc10ef167c4e8f1ca23c022b88e536e51207b8b43f07f0e46c2
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 0.9796

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 https://netcdn.tw/app/431946152/roblox-hack-copy-and-paste-game-hack PDF link annotation
    • https://digilib.stimlog.ac.id/repository/how-to-get-free-robux-generator_GM431946152.pdfIn PDF document text
    • http://digilib.stimlog.ac.id/repository/coin-master-hack-spin-generator_GM406889139.pdfIn PDF document text
    • http://digilib.stimlog.ac.id/repository/roblox-apocalypse-rising-hack_GM431946152.pdfIn PDF document text
    • http://digilib.stimlog.ac.id/repository/how-to-get-roblox-premium-for-free-2021_GM431946152.pdfIn PDF document text
    • http://digilib.stimlog.ac.id/repository/how-to-get-free-roblox-gift-cards_GM431946152.pdfIn PDF document text
    • https://digilib.stimlog.ac.id/repository/coin-master-hack-safe_GM406889139.pdfIn PDF document text
    • http://digilib.stimlog.ac.id/repository/is-there-a-way-to-get-free-tiktok-followers_GM835599320.pdfIn PDF document text
    • https://digilib.stimlog.ac.id/repository/coin-master-spin-hack_GM406889139.pdfIn PDF document text
    • https://digilib.stimlog.ac.id/repository/free-coins--spins-coin-master_GM406889139.pdfIn PDF document text
    • http://digilib.stimlog.ac.id/repository/free-spins-coin-master-links-blogspot_GM406889139.pdfIn PDF document text
    • http://digilib.stimlog.ac.id/repository/free-robux-wheel_GM431946152.pdfIn PDF document text
    • http://digilib.stimlog.ac.id/repository/free-minecraft-packs_GM479516143.pdfIn PDF document text
    • http://digilib.stimlog.ac.id/repository/how-to-hack-people-in-roblox_GM431946152.pdfIn PDF document text
    • http://digilib.stimlog.ac.id/repository/free-minecraft-gift-card_GM479516143.pdfIn PDF document text
    • https://digilib.stimlog.ac.id/repository/coinmaster_GM406889139.pdfIn PDF document text
    • http://digilib.stimlog.ac.id/repository/boku-no-roblox-hack_GM431946152.pdfIn PDF document text
    • https://digilib.stimlog.ac.id/repository/coin-master-free-spins-link-download_GM406889139.pdfIn PDF document text
    • http://digilib.stimlog.ac.id/repository/village-4-coin-master_GM406889139.pdfIn PDF document text
    • http://digilib.stimlog.ac.id/repository/hackear-juego-coin-master-espaol_GM406889139.pdfIn PDF document text
    • http://digilib.stimlog.ac.id/repository/roblox-free-models_GM431946152.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_004_off00005616.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x5616 24896 bytes
SHA-256: 16af58009ff11ae33f1ed87f333a975cbca53dcc8488af1e82b2cbb026d600af
font_01_sfnt_off00008fb5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8FB5 2824 bytes
SHA-256: 94c1b019735d7e491765340abe50b2897410e2ec65ecf141c08bd9f2220897c4
font_02_sfnt_off00009963.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9963 18968 bytes
SHA-256: 0d2468688eb573ccd4da1f5c9ce85810397846f72b7d6aac212884b657c28ff8

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