Malicious PDF — malware analysis report

Static analysis result for SHA-256 934bf1d24d806999…

MALICIOUS

PDF

34.8 KB Created: 2021-07-06 04:59:19 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-27
MD5: 57b03c89b2710df6240e2bb3433d30fb SHA-1: 4e5835e7d7afbc742c5b2fd32369a815c1ca359c SHA-256: 934bf1d24d8069998656c939b51541b404da95fea114588ec0e9bb85528b46ae
142 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains numerous links to external sites, many of which are SEO-optimized link farms promoting game hacks and free items. The primary lure appears to be 'free Minecraft Bedrock Edition download', directing users to a suspicious URL. The ML classifier strongly indicated maliciousness, and the PDF structure suggests a link farm designed to drive traffic to potentially harmful content.

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/479516143/minecraft-bedrock-edition-download-pc-free-game-hack PDF link annotation
    • http://library.unissula.ac.id/fk/repository/roblox-hexus-free-download_GM431946152.pdfIn PDF document text
    • http://library.unissula.ac.id/fk/repository/rbx-free-robux_GM431946152.pdfIn PDF document text
    • http://library.unissula.ac.id/fe/repository/free-card-collection-in-coin-master_GM406889139.pdfIn PDF document text
    • http://library.unissula.ac.id/fk/repository/how-to-get-free-robux-218_GM431946152.pdfIn PDF document text
    • http://library.unissula.ac.id/fe/repository/free-spins-on-coin-master-without-human-verification_GM406889139.pdfIn PDF document text
    • http://library.unissula.ac.id/fk/repository/roblox-weight-lifting-simulator-hack_GM431946152.pdfIn PDF document text
    • http://library.unissula.ac.id/fk/repository/what-is-a-way-to-get-free-robux_GM431946152.pdfIn PDF document text
    • http://library.unissula.ac.id/fk//repository/coin-master-gold-cards-free-link_GM406889139.pdfIn PDF document text
    • http://library.unissula.ac.id/fk/repository/free-robux-and-tix-tricks-amp_GM431946152.pdfIn PDF document text
    • http://library.unissula.ac.id/fe/repository/coin-master-mod-apk-unlimited-spin-download-free-full-version_GM406889139.pdfIn PDF document text
    • http://library.unissula.ac.id/fe/repository/free-spins-coin-master-november-2021_GM406889139.pdfIn PDF document text
    • http://library.unissula.ac.id/fe/repository/free-coin-master-spins-2021_GM406889139.pdfIn PDF document text
    • http://library.unissula.ac.id/fk/repository/hack-coin-master-spin-apk_GM406889139.pdfIn PDF document text
    • http://library.unissula.ac.id/fe/repository/roblox-2021-hack_GM431946152.pdfIn PDF document text
    • http://library.unissula.ac.id/fe/repository/free-robux-codes-november-2021_GM431946152.pdfIn PDF document text
    • http://library.unissula.ac.id/fe/repository/hack-de-roblox-para-tener-robux_GM431946152.pdfIn PDF document text
    • http://library.unissula.ac.id/fk//repository/coin-master-daily-bonus-hack_GM406889139.pdfIn PDF document text
    • http://library.unissula.ac.id/fe/repository/how-to-get-free-spins-on-coin-master-facebook_GM406889139.pdfIn PDF document text
    • http://library.unissula.ac.id/fk/repository/hack-roblox-weight-lifting_GM431946152.pdfIn PDF document text
    • http://library.unissula.ac.id/fe/repository/coin-master-free-coins-and-spins-today_GM406889139.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_off0000328d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x328D 22160 bytes
SHA-256: 896ac0d94f7c0861b412221225158f8b75ea0840ad4645698159d17b02018a2d
font_01_sfnt_off00006323.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6323 19120 bytes
SHA-256: f0fe155c1e53163b1cade4296e0b54f6b6a61c47b1408d2b62092597c44fe41f

Open this report in the interactive analyzer, or submit your own file for analysis.