Malicious PDF — malware analysis report

Static analysis result for SHA-256 7e0f1b1e5919c1c7…

MALICIOUS

PDF

43.2 KB Created: 2021-05-12 23:06:04 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-29
MD5: c79c74ec4b2b8c947519de9086afc883 SHA-1: 166d03e5530d86ef0accbedc9da2cf1aca6a5447 SHA-256: 7e0f1b1e5919c1c76362d62d0708b59567a99d8a278ff6de8f00b732ece6b90e
142 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF document was flagged as malicious by an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm, 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 0.9969

Heuristics 5

  • 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.
  • 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.xyz/app/406889139/get-gold-coin-master-village-hack-game-hack PDF link annotation
    • https://perpustakaan.stieppi.ac.id/repository/free-robux-live_GM431946152.pdfIn PDF document text
    • https://perpustakaan.stieppi.ac.id/repository/roblox-sexually_GM431946152.pdfIn PDF document text
    • https://perpustakaan.stieppi.ac.id/repository/how-to-get-free-robux-on-mobile_GM431946152.pdfIn PDF document text
    • https://perpustakaan.stieppi.ac.id/repository/coin-master-hack-apk-download_GM406889139.pdfIn PDF document text
    • https://perpustakaan.stieppi.ac.id/repository/coin-master-hack-2021-download_GM406889139.pdfIn PDF document text
    • https://perpustakaan.stieppi.ac.id/repository/best-way-to-get-robux_GM431946152.pdfIn PDF document text
    • https://perpustakaan.stieppi.ac.id/repository/coin-master-free-spin-and-coins-links-2021_GM406889139.pdfIn PDF document text
    • https://perpustakaan.stieppi.ac.id/repository/google-coin-master-free-spins_GM406889139.pdfIn PDF document text
    • https://perpustakaan.stieppi.ac.id/repository/coin-master-free-spin-links-december-30-2021_GM406889139.pdfIn PDF document text
    • https://perpustakaan.stieppi.ac.id/repository/how-to-get-free-robux-easy_GM431946152.pdfIn PDF document text
    • https://perpustakaan.stieppi.ac.id/repository/microsoft-roblox-rewards_GM431946152.pdfIn PDF document text
    • https://perpustakaan.stieppi.ac.id/repository/card-hack-for-coin-master_GM406889139.pdfIn PDF document text
    • https://perpustakaan.stieppi.ac.id/repository/free-spins-on-coin-master-2021_GM406889139.pdfIn PDF document text
    • https://perpustakaan.stieppi.ac.id/repository/free-robux-now_GM431946152.pdfIn PDF document text
    • https://perpustakaan.stieppi.ac.id/repository/hack-coin-master-mod-apk_GM406889139.pdfIn PDF document text
    • https://perpustakaan.stieppi.ac.id/repository/coin-master-pet-food-free_GM406889139.pdfIn PDF document text
    • https://perpustakaan.stieppi.ac.id/repository/coin-master-free-spin-whatsapp-group-link_GM406889139.pdfIn PDF document text
    • https://perpustakaan.stieppi.ac.id/repository/how-to-hack-people-in-roblox_GM431946152.pdfIn PDF document text
    • https://perpustakaan.stieppi.ac.id/repository/coin-master-hack-account_GM406889139.pdfIn PDF document text
    • https://perpustakaan.stieppi.ac.id/repository/microsoft-bing-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
stream_003_off00004c44.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4C44 25336 bytes
SHA-256: 07ecd540aeb94c0da25f01f5de14d191fc780f532b6f16e406b58d5dcd29c459
font_01_sfnt_off00008621.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8621 18388 bytes
SHA-256: e77cef24f5c79b9f51e9f70b77304391e5c08dcf7bdeba9a71ee0130a57e30ad

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