Malicious PDF — malware analysis report

Static analysis result for SHA-256 8dd98679e935f87b…

MALICIOUS

PDF

34.8 KB Created: 2021-07-06 02:22:56 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-25
MD5: 2e756eef191c1a782d8851a2a87ca93a SHA-1: 1a6faf49d023afc6e4a4642fbd28ef488dd7900e SHA-256: 8dd98679e935f87b864170b6b410ec5697947d3b783c1488f3666ade6096621a
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.tw/app/406889139/coin-master-free-spins-link-2021-ios-game-hack PDF link annotation
    • https://perpustakaan.itda.ac.id/repository/pubg-uc-generator-without-verification_GM1330123889.pdfIn PDF document text
    • https://perpustakaan.itda.ac.id/repository/roblox-hack-generator-no-survey-no-download_GM431946152.pdfIn PDF document text
    • https://perpustakaan.itda.ac.id/repository/como-descargar-hack-en-roblox_GM431946152.pdfIn PDF document text
    • https://perpustakaan.itda.ac.id/repository/coin-master-free-spins-moonactive_GM406889139.pdfIn PDF document text
    • https://perpustakaan.itda.ac.id/repository/coin-master-hack-xyz-download-free_GM406889139.pdfIn PDF document text
    • https://perpustakaan.itda.ac.id/repository/10-free-spins-coin-master_GM406889139.pdfIn PDF document text
    • https://perpustakaan.itda.ac.id/repository/want-free-robux-copy-and-paste_GM431946152.pdfIn PDF document text
    • https://perpustakaan.itda.ac.id/repository/roblox-hacks-for-mac_GM431946152.pdfIn PDF document text
    • https://perpustakaan.itda.ac.id/repository/free-robux-so-sick-free-card_GM431946152.pdfIn PDF document text
    • https://perpustakaan.itda.ac.id/repository/roblox-ftw_GM431946152.pdfIn PDF document text
    • https://perpustakaan.itda.ac.id/repository/descargar-roblox-hackeado-para-android_GM431946152.pdfIn PDF document text
    • https://perpustakaan.itda.ac.id/repository/who-is-the-best-hacker-in-roblox_GM431946152.pdfIn PDF document text
    • https://perpustakaan.itda.ac.id/repository/how-do-i-hack-someone-on-roblox-with-edidthiscookie_GM431946152.pdfIn PDF document text
    • https://perpustakaan.itda.ac.id/repository/coin-master-daily-free-spins-link-facebook_GM406889139.pdfIn PDF document text
    • https://perpustakaan.itda.ac.id/repository/critical-strike-hacks-roblox_GM431946152.pdfIn PDF document text
    • https://perpustakaan.itda.ac.id/repository/hack-de-roblox-para-volar_GM431946152.pdfIn PDF document text
    • https://perpustakaan.itda.ac.id/repository/easy-free-robux-todaycom_GM431946152.pdfIn PDF document text
    • https://perpustakaan.itda.ac.id/repository/claimrbx-free-robux_GM431946152.pdfIn PDF document text
    • https://perpustakaan.itda.ac.id/repository/funny-hack-on-roblox_GM431946152.pdfIn PDF document text
    • https://perpustakaan.itda.ac.id/repository/coin-master-hack-without-verification-code-2021_GM406889139.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_off0000300f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x300F 23000 bytes
SHA-256: 05b4b7c1a70b2c51f1c096a4dfaf6f116bcc0092de0f6b9777a96b2333cdc8da
font_01_sfnt_off00006402.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6402 18748 bytes
SHA-256: 785b8830476a1dba2603225cf55ebb3d3433825858fb25e5612ad86a59b30773

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