Malicious PDF — malware analysis report

Static analysis result for SHA-256 5d3026a934a197e7…

MALICIOUS

PDF

33.1 KB Created: 2021-06-29 20:06:19 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-25
MD5: 90a0b5683d3575448f5c3fe723a2d665 SHA-1: 1332c7f364cd58c4d4b944c9c6d80102119e933a SHA-256: 5d3026a934a197e78d3483053ab81e4a81b479b68a231c6cfdf3139ad153ea2a
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 0.9980

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 http://netcdn.co/app/431946152/hacks-deathnote-roblox-game-hack PDF link annotation
    • https://perpustakaan.itda.ac.id/repository/free-roblox-shop_GM431946152.pdfIn PDF document text
    • https://perpustakaan.itda.ac.id/repository/free-robux-please_GM431946152.pdfIn PDF document text
    • https://perpustakaan.itda.ac.id/repository/free-robux-generator-no-survey-youtube_GM431946152.pdfIn PDF document text
    • https://perpustakaan.itda.ac.id/repository/coin-master-game-android-free-download_GM406889139.pdfIn PDF document text
    • https://perpustakaan.itda.ac.id/repository/t-shirt-roblox-girl-free_GM431946152.pdfIn PDF document text
    • https://perpustakaan.itda.ac.id/repository/coin-master-free-spins-haktuts_GM406889139.pdfIn PDF document text
    • https://perpustakaan.itda.ac.id/repository/counter-blocks-roblox-offensive-hacks_GM431946152.pdfIn PDF document text
    • https://perpustakaan.itda.ac.id/repository/free-robux-generator-2021-no-human-verification-or-survey_GM431946152.pdfIn PDF document text
    • https://perpustakaan.itda.ac.id/repository/how-to-make-free-robux_GM431946152.pdfIn PDF document text
    • https://perpustakaan.itda.ac.id/repository/old-roblox-accounts-free_GM431946152.pdfIn PDF document text
    • https://perpustakaan.itda.ac.id/repository/tp-hacks-script-roblox_GM431946152.pdfIn PDF document text
    • https://perpustakaan.itda.ac.id/repository/timber-roblox-hack_GM431946152.pdfIn PDF document text
    • https://perpustakaan.itda.ac.id/repository/roblox-pink-free-robux_GM431946152.pdfIn PDF document text
    • https://perpustakaan.itda.ac.id/repository/best-free-spins-for-coin-master_GM406889139.pdfIn PDF document text
    • https://perpustakaan.itda.ac.id/repository/free-vip-server-roblox-pet-simulator_GM431946152.pdfIn PDF document text
    • https://perpustakaan.itda.ac.id/repository/tiktok-free-20-likes_GM835599320.pdfIn PDF document text
    • https://perpustakaan.itda.ac.id/repository/coin-master-spin-link-free_GM406889139.pdfIn PDF document text
    • https://perpustakaan.itda.ac.id/repository/coin-master-free-spins-link-no-verification-2021_GM406889139.pdfIn PDF document text
    • https://perpustakaan.itda.ac.id/repository/coin-master-free-spin-redeem-code_GM406889139.pdfIn PDF document text
    • https://perpustakaan.itda.ac.id/repository/free-little-robux_GM431946152.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00002d7b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2D7B 21372 bytes
SHA-256: 8bea1862217d3a30989e54a693de14e31f286f89731cba757b6155776ce7bc57
font_01_sfnt_off00005bf2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5BF2 19092 bytes
SHA-256: ae8129d4fe27272d599d4684e480d18e761c04f8c2aab910c06b4cbe8b8b04de

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