Malicious PDF — malware analysis report

Static analysis result for SHA-256 a5a5b14739d1da8a…

MALICIOUS

PDF

35.8 KB Created: 2021-07-01 06:20:31 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-05
MD5: e246082b9c07741c21a8707197fb01bf SHA-1: d4aa2775eae3ac642b907bd6f98f42ebd3d0d28a SHA-256: a5a5b14739d1da8a7d7221ab3fe841b9c8f18d04dd29e4f1d1c091f3f203200b
142 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF file contains numerous links designed to lure users into clicking on what appear to be game hacks and generators. The heuristic PDF_SEO_LINK_FARM indicates a large number of these links, suggesting a link farm or SEO abuse tactic. The ML_NYX_PDF_MALICIOUS model also strongly flagged this file. The primary attack pattern involves directing users to potentially malicious external sites via these deceptive links.

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/406889139/coin-master-daily-free-spins-link-today-2021-free-game-hack PDF link annotation
    • http://e-learning.mapuicijantung.sch.id/__statics/gudangsoal/files/coin-master-hack-apk-35-13_GM406889139.pdfIn PDF document text
    • http://e-learning.mapuicijantung.sch.id/__statics/gudangsoal/files/how-to-get-infinite-robux_GM431946152.pdfIn PDF document text
    • http://e-learning.mapuicijantung.sch.id/__statics/gudangsoal/files/free-minecraft-bedrock-server-hosting_GM479516143.pdfIn PDF document text
    • http://e-learning.mapuicijantung.sch.id/__statics/gudangsoal/files/free-robux-codes-no-human-verification_GM431946152.pdfIn PDF document text
    • http://e-learning.mapuicijantung.sch.id/__statics/gudangsoal/files/how-to-get-free-robux-without-surveys_GM431946152.pdfIn PDF document text
    • http://e-learning.mapuicijantung.sch.id/__statics/gudangsoal/files/coin-master-free-download-pc_GM406889139.pdfIn PDF document text
    • http://e-learning.mapuicijantung.sch.id/__statics/gudangsoal/files/how-to-get-a-lot-of-robux_GM431946152.pdfIn PDF document text
    • http://e-learning.mapuicijantung.sch.id/__statics/gudangsoal/files/how-to-get-gold-cards-on-coin-master-hack_GM406889139.pdfIn PDF document text
    • http://e-learning.mapuicijantung.sch.id/__statics/gudangsoal/files/minecraft-tower-defense-hacked_GM479516143.pdfIn PDF document text
    • http://e-learning.mapuicijantung.sch.id/__statics/gudangsoal/files/coin-master-apk-hack-download_GM406889139.pdfIn PDF document text
    • http://e-learning.mapuicijantung.sch.id/__statics/gudangsoal/files/wurst-download_GM479516143.pdfIn PDF document text
    • http://e-learning.mapuicijantung.sch.id/__statics/gudangsoal/files/como-hackear-coin-master-ios_GM406889139.pdfIn PDF document text
    • http://e-learning.mapuicijantung.sch.id/__statics/gudangsoal/files/www-roblox-com-free-robux_GM431946152.pdfIn PDF document text
    • http://e-learning.mapuicijantung.sch.id/__statics/gudangsoal/files/coin-master-free-coins-and-spins_GM406889139.pdfIn PDF document text
    • http://e-learning.mapuicijantung.sch.id/__statics/gudangsoal/files/free-robux-real-2021_GM431946152.pdfIn PDF document text
    • http://e-learning.mapuicijantung.sch.id/__statics/gudangsoal/files/free-robux-no-verification-or-survey_GM431946152.pdfIn PDF document text
    • http://e-learning.mapuicijantung.sch.id/__statics/gudangsoal/files/can-u-get-free-robux_GM431946152.pdfIn PDF document text
    • http://e-learning.mapuicijantung.sch.id/__statics/gudangsoal/files/get-robux-for-free-2021_GM431946152.pdfIn PDF document text
    • http://e-learning.mapuicijantung.sch.id/__statics/gudangsoal/files/free-robux-just-enter-username_GM431946152.pdfIn PDF document text
    • http://e-learning.mapuicijantung.sch.id/__statics/gudangsoal/files/free-robux-no-offers_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_002_off000031a7.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x31A7 23260 bytes
SHA-256: 9f2074cc8db384752d9782b64a271c09128e43818f847c2cc86982aeac27a45e
font_01_sfnt_off0000662c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x662C 19344 bytes
SHA-256: bda18ad7bc028b2989dfdc10c84b9c87c1dbf0242a88a3a6fbf9217f203e509c

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